Hi guy's, similar to TJ's post (GTX 770 vs GTX780Ti) I'm getting quite poor times for a 780 ti. (compared to other's)

Other than the 780 ti running poor times everything else seems normal.(logs ect) I notice no throttling or any suspicious behaviour, temps are kept under control ect, it's just slow.

After reading TJ's thread & seeing Retvari's stunning times (17,000sec's & under)I may see if I can find a copy of WinXP. My times are between 5000-7000 sec's longer(22,000-24500sec's)then Retvari's 780 ti. That's a massive amount of difference.

This is my host: http://www.gpugrid.net/show_host_detail.php?hostid=112153
Specs:
Win x64
Gigabyte 780 ti. Driver ver 331.82
MB: Asus x79 Deluxe
i7 4930k
Boinc 7.2.33
SWAN_SYNC is on.

Anyone else having similar issues?

Thanks for reading.

PS: Does anyone know what effect turning on "KBOOST" would have for Boinc?
KBOOST is a setting available in EVGA presisionX that locks the card in boost mode.

Sorry wrong host :)

This host in question with the 780 ti in it. http://www.gpugrid.net/show_host_detail.php?hostid=164132

Thanks again..

Hi JugNut,

The name you give on the thread is better than I choose.
However my 780Ti is slightly faster then my 770 that's why I chose that name.
Perhaps we get more response here. Anyhow your times are better than mine.

One Noelia WU pushed the card to 1033MHz with a usage of 91%. Now it is back to 875MHz. But the card can run faster, that has now been proven.

At what frequency is your GPU Core Clock running and at what frequency did you set it? What is the temperature?

____________
Greetings from TJ

I have a Win XP disc that came with a used Dell computer I bought from a friend. I have no use for the disk, you can have it if you want it, it comes with a legal/valid key. I'll mail it to you on my dime.

Or I can make it and the key available for download to anyone who wants a copy if someone can tell me how to scrape the bits off the disk and store them in an ISO or whatever format is most convenient.

But rather than get "imprisoned" by an antiquated OS that will soon be unsupported, why not install Linux and get the same performance from your 780ti as you would with XP, some say even slightly better. You could install it once on any machine on your LAN then install a boot image on that machine. All the other machines on your LAN could then boot from that image. The only catch is that the BIOS on your mobo needs to support boot over LAN. The advantage is that you need to update and maintain only the "master" because the "slaves" boot whatever is on the master. The slaves can also run "diskless" and use a partition created on the master's disk or any disk on the LAN. You can probably do all that on Windows too with freeware or it might be proprietary, not sure. The thing is support for it could be dropped at anytime if it's XP based. With Linux the support will be forever as it's an integral part of the OS, always has been and always will be.

____________
BOINC <<--- credit whores, pedants, alien hunters

Thanks for your post guy's.

The 780 ti is at stock clocks. IE Clock: 876MHz (Boost: 928MHz) Memory 7000MHz. (1749mhz) But it's boosts speed has always been 1019mhz for some reason.

After my post I increased the power target & temp target to (max). I'll see how that goes for 24hrs. But the boost has stayed the same so I guess that's it's limit, so WU times are unlikely to get any better, but who knows? it's worth a shot.

@ Dagorath: Thanks for your kind offer. I have an OEM copy of XP somewhere but I think it's locked to whatever PC it came with years ago.(a laptop I think)

Like most PC enthusiasts i've tried a few different flavors of Linux over the years but but I never stuck at it. So my Linux-ease is severely lacking as a result. All my PC's are dedicated boinc rigs & also have mixed GPU's (both AMD & Nvidia) & the last time I tried installing linux I had all kind of trouble installing both video drivers for boinc to use. And when your boinc addicted every second of down time seams like years, it wasn't long before windows was back up & running again:) Although I wonder if my problem is OS specific at all? Next I may give the KBOOST setting in EVGA presisionX a try.

Any other thoughts for TJ or myself guy's?

Hmm you have the same settings I have. I tried that as well indeed, switch everything to maximum but no extra speed yet. Temperature goes quick to 82-83°C then but GPU load remains around 81%.
We have both Win7, thus that could be a factor as Zoltan is suggesting.


____________
Greetings from TJ

Built a new machine with Win7 and a pair of 780Ti. http://www.gpugrid.net/show_host_detail.php?hostid=165832

A little surprised on the difference between XP and Win7 for processing times. Yes, I read it on many a thread, but sometimes one needs to see things up and close before getting smacked in the face extra hard.

A week or so ago when batch of NOELIA_DIPEPT1 came through, the cards were only running at ~45-55% utilization. Decided it would be good to try to run two WUs at once. Up till then, the cards were getting 70-80% utilization pulling 750W according to APC PowerChute off of Seasonic Platinum 1000W PSU.

So searched through old threads to figure out how to write the app_config file. http://www.gpugrid.net/forum_thread.php?id=3319&nowrap=true#29216. Since I already like to be smacked hard, I thought so many cores on the 780ti, that surely I would get some benefit out of running two!

So I ran for a couple of days with 2 WU per GPU, and switched back to start looking at new batch. Like to test on again off again especially since I seemed to be between batches by luck.

Switching back to 1 WU per GPU, I simply removed the App_config. Well, now my times were similar to a GTX680 and utilization is mostly around 50%-60%. Now only pulling 650W.

So I have looked at the usual suspects...

* I like to keep a thread free to keep it snappy since this is my main use rig. So not CPU restricted. acemd keeps 12-13% in task manager per acemd WU.
* Restarted Boinc Manger a few times.
* Warm reboot a few times.
* Cold reboot (~5 minutes off).
* Temps are fine on cards. Like to keep <75°C and are typically 65-70.
* Cards are not downclocking. Well actually, when the load goes closer to 40%, I see the card clock drop and GPU-Z says Performance Cap is limited by "Util" (card utilization).
* I have not changed drivers during this or installed anything new.
* After switching back to 1 WU per GPU, I did add the Intel GPU drivers, but the problem existed before and stayed the same after.
* Looked in client_state and even though they should only indicate time estimates, I tried changing <duration_correction_factor> and <flops>, but they were just corrected back after a couple hours. <avg_ncpus> stayed 0.5 at removing app_config so I made it equal to the <max_ncpus>, but no change in performance.

Besides deleting the project and reattaching or installing new drivers....thoughts on what file has become hung up on wanting to not utilize the cards as much as before?


Other Info:

cc_config
<cc_config>
<options>
<use_all_gpus>1</use_all_gpus>
<start_delay>30</start_delay>
<skip_cpu_benchmarks>1</skip_cpu_benchmarks>
</options>
</cc_config>

app_config (that was originally run for 2 WU per GPU)
<app_config>
<app>
<name>acemdlong</name>
<max_concurrent>9999</max_concurrent>
<gpu_versions>
<gpu_usage>0.5</gpu_usage>
<cpu_usage>0.001</cpu_usage>
</gpu_versions>
</app>
</app_config>

app_config (trying new version to "fix" the issue)
<app_config>
<app>
<name>acemdlong</name>
<max_concurrent>2</max_concurrent>
<gpu_versions>
<gpu_usage>1.0</gpu_usage>
<cpu_usage>0.5</cpu_usage>
</gpu_versions>
</app>
</app_config>

Startup Event Log

2/9/2014 10:47:56 PM | | Starting BOINC client version 7.2.33 for windows_x86_64
2/9/2014 10:47:56 PM | | log flags: file_xfer, sched_ops, task
2/9/2014 10:47:56 PM | | Libraries: libcurl/7.25.0 OpenSSL/1.0.1 zlib/1.2.6
2/9/2014 10:47:56 PM | | Data directory: C:\ProgramData\BOINC
2/9/2014 10:47:56 PM | | Running under account Jeremy
2/9/2014 10:47:56 PM | | CUDA: NVIDIA GPU 0: GeForce GTX 780 Ti (driver version 332.21, CUDA version 6.0, compute capability 3.5, 3072MB, 2839MB available, 6247 GFLOPS peak)
2/9/2014 10:47:56 PM | | CUDA: NVIDIA GPU 1: GeForce GTX 780 Ti (driver version 332.21, CUDA version 6.0, compute capability 3.5, 3072MB, 2925MB available, 6247 GFLOPS peak)
2/9/2014 10:47:56 PM | | OpenCL: NVIDIA GPU 0: GeForce GTX 780 Ti (driver version 332.21, device version OpenCL 1.1 CUDA, 3072MB, 2839MB available, 6247 GFLOPS peak)
2/9/2014 10:47:56 PM | | OpenCL: NVIDIA GPU 1: GeForce GTX 780 Ti (driver version 332.21, device version OpenCL 1.1 CUDA, 3072MB, 2925MB available, 6247 GFLOPS peak)
2/9/2014 10:47:56 PM | | OpenCL: Intel GPU 0: Intel(R) HD Graphics 4600 (driver version 9.18.10.3257, device version OpenCL 1.2, 1624MB, 1624MB available, 200 GFLOPS peak)
2/9/2014 10:47:56 PM | | OpenCL CPU: Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz (OpenCL driver vendor: Intel(R) Corporation, driver version 1.2, device version OpenCL 1.2 (Build 66956))
2/9/2014 10:47:56 PM | | Host name: i7-4770k-jz
2/9/2014 10:47:56 PM | | Processor: 8 GenuineIntel Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz [Family 6 Model 60 Stepping 3]
2/9/2014 10:47:56 PM | | Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss htt tm pni ssse3 fma cx16 sse4_1 sse4_2 movebe popcnt aes syscall nx lm vmx tm2 pbe
2/9/2014 10:47:56 PM | | OS: Microsoft Windows 7: Professional x64 Edition, Service Pack 1, (06.01.7601.00)
2/9/2014 10:47:56 PM | | Memory: 15.87 GB physical, 31.75 GB virtual
2/9/2014 10:47:56 PM | | Disk: 238.25 GB total, 165.67 GB free
2/9/2014 10:47:56 PM | | Local time is UTC -6 hours
2/9/2014 10:47:56 PM | | Config: use all coprocessors
2/9/2014 10:47:56 PM | Einstein@Home | URL http://einstein.phys.uwm.edu/; Computer ID 10123203; resource share 25
2/9/2014 10:47:56 PM | LHC@home 1.0 | URL http://lhcathomeclassic.cern.ch/sixtrack/; Computer ID 10313670; resource share 25
2/9/2014 10:47:56 PM | SETI@home | URL http://setiathome.berkeley.edu/; Computer ID 7189091; resource share 25
2/9/2014 10:47:56 PM | GPUGRID | URL http://www.gpugrid.net/; Computer ID 165832; resource share 100
2/9/2014 10:47:56 PM | SETI@home | General prefs: from SETI@home (last modified 06-Feb-2014 22:07:34)
2/9/2014 10:47:56 PM | SETI@home | Host location: none
2/9/2014 10:47:56 PM | SETI@home | General prefs: using your defaults
2/9/2014 10:47:56 PM | | Reading preferences override file
2/9/2014 10:47:56 PM | | Preferences:
2/9/2014 10:47:56 PM | | max memory usage when active: 4063.87MB
2/9/2014 10:47:56 PM | | max memory usage when idle: 8127.75MB
2/9/2014 10:47:56 PM | | max disk usage: 10.00GB
2/9/2014 10:47:56 PM | | max CPUs used: 6
2/9/2014 10:47:56 PM | | max download rate: 98304 bytes/sec
2/9/2014 10:47:56 PM | | max upload rate: 49152 bytes/sec
2/9/2014 10:47:56 PM | | (to change preferences, visit a project web site or select Preferences in the Manager)
2/9/2014 10:47:56 PM | | Not using a proxy
2/9/2014 10:47:57 PM | | Suspending computation - initial delay

Thank you for the suggestion. I have put app_config back in place and set it with <cpu_usage>1.0</cpu_usage>. I do not think this is the issue since the CPU times are on par with GPU time, task manager is running 12-13% solid, and I have spare CPU cycles. Will see tonight if any differences.

Times do seem to be stabilizing on WU's with the change, but same speed as a 680 still. Previously, it was saying 0.87 CPU for WU. Still seems odd, and will watch if the daily work volume increases. GPU utilization is still low at 50% for both GPU's and only pulling 630W currently.

skygiven, Thank you for your time and thoughts. This is just an odd situation. See below responses. See below responses.

Jeremy, I'm running SANTI_MAR tasks on a 770 and 670 under W7 and seeing 80% GPU utilization while running 6 CPU tasks.

Is SLI on?

What are the GPU clocks and what are you using to control the fan speed (MSI Afterburner for example)?

Might be worth adding a modest OC on the GPU and saving the profile; just in case the GPU's are going into a reduced power state and not recovering properly (say the GDDR5 stays low).

skgiven, had to check your name a little closer. Sorry about that, you have been skygiven in my head the whole time reading the forums. :)

Disabled the Intel GPU projects, and restarted and the Santi_MARwtcap's running jumped up from 50% to 70% utilization. Will continue to watch, but it looks like that may have been the issue.

Not exactly sure why this would be the case since I have the CPU running at 4.1ghz and the acemd were each getting 12-13% shown in task manager. I'll take it though. I'll report back to see if this holds.

Thank you.

The times are back normal for 780Ti's under Win7.

The times are the Santi_MAR422 and Santi_MARwtcap are 19,850 - 20,750 seconds for last 5 WUs.
The times before the switch were 23,450 - 24,650 seconds for previous 5 WUs.

So using the iGPU on the i7-4770k on Win7 cost 21% performance drop on the 780Ti GPUGrid processing for at least the Santi MAR422/wtcap WUs. This is even with a free thread being left on the CPU. Interesting.

skgiven, thank you for helping me find the issue.

The times are back normal for 780Ti's under Win7.

The times are the Santi_MAR422 and Santi_MARwtcap are 19,850 - 20,750 seconds for last 5 WUs.
The times before the switch were 23,450 - 24,650 seconds for previous 5 WUs.

So using the iGPU on the i7-4770k on Win7 cost 21% performance drop on the 780Ti GPUGrid processing for at least the Santi MAR422/wtcap WUs. This is even with a free thread being left on the CPU. Interesting.

skgiven, thank you for helping me find the issue.

TJ,
I use the EVGA Precision app for monitor/control, and try to keep ~<70C. My app_config and cc_config files are short.

cc_config
<cc_config>
<options>
<use_all_gpus>1</use_all_gpus>
<start_delay>30</start_delay>
<skip_cpu_benchmarks>1</skip_cpu_benchmarks>
</options>
</cc_config>

app_config
<app_config>
<app>
<name>acemdlong</name>
<max_concurrent>2</max_concurrent>
<gpu_versions>
<gpu_usage>1.0</gpu_usage>
<cpu_usage>1.0</cpu_usage>
</gpu_versions>
</app>
</app_config>

The swan_sync env variable is setup.
Boinc is now set to use 99% of the CPU's (7 threads where 2 are for GPUGrid), 100% of CPU Time. While computer is in use is checked, and use CPU while computer is in use is checked. Activity menu has Run Always and Use GPU Always both checked.

Even though both cards were purchased in one order directly from EVGA, they are performing a little bit different. In the tower case, the lower card is always at max voltage 1.175v. If I sync the card settings (precision feature) to 100% power target, 0 GPU Clock Offset and 0 Memory offset, the lower card will boost to 1150Mhz at 64C at 1.175v and the upper card will boost to 1162mhz at 69C at 1.161v. I have to take the time to switch the card positions in the board to ensure it is a card difference some day, but for now, it is just interesting.

Still seeing how far I can boost them, but currently having good success with 1188 and 1212mhz. These cards are on air so working rather well for winter. Probably will change when summer gets here.

I hope this info helps.

Thank you for the information Jeremy. It gives me information to fiddle with my card.

I see you have the card run at higher clock speed then I have. Mine is running at 875MHz. We have more or less the same cc-config but I don't use an app_config.
I will first try to boost the clock and see what happens.

To my opinion EVGA are the best cards, but last year they where not available when I wanted an 780Ti.

I have two GTX660's from EVGA in another rig and they slightly differ as well. If I sync the cards, the clock speed and temperature of the second card, in the slot further away from the CPU, is little lower and a few degrees lower.
____________
Greetings from TJ

I have increased to GPU core clock and also the voltage little to try to achieve same times as Jeremy. However if a WU has run for a few seconds the GPU clock goes to 875.7MHz, very occasionally to 920-930MHz for a few minutes. GPU load is 78% with Santi's. Temperature is 72°C.
Do I need to set the voltage lower or higher?
____________
Greetings from TJ

I have increased to GPU core clock and also the voltage little to try to achieve same times as Jeremy. However if a WU has run for a few seconds the GPU clock goes to 875.7MHz, very occasionally to 920-930MHz for a few minutes. GPU load is 78% with Santi's. Temperature is 72°C.
Do I need to set the voltage lower or higher?

Temperature is currently at 68°C. I can not get it low. This card will power itself down when reached 109°C. So as long as I can keep it below 80°C it should be okay. Ambient temperature will only increase as the season gradually warms.
____________
Greetings from TJ

I give up.

____________
BOINC <<--- credit whores, pedants, alien hunters

I just replaced my two 680s with two 780Tis. Only on my first run with the new cards, but so far the times seem better.

Running 334.89:
SANTI_MAR GPU utilization 72% @ 1137MHz
NOELIA_FXA GPU utilization 79% @ 1124MHz

I always have one card in my case that boosts just a bit higher than the other.

Looking at the current progress and comparing it against my runs on the 680s, it looks like the NOELIA task will complete about 2 hours faster, and the the SANTI task will complete about 1.5 hours faster.
____________

I just replaced my two 680s with two 780Tis. Only on my first run with the new cards, but so far the times seem better.

Running 334.89:
SANTI_MAR GPU utilization 72% @ 1137MHz
NOELIA_FXA GPU utilization 79% @ 1124MHz

I always have one card in my case that boosts just a bit higher than the other.

Looking at the current progress and comparing it against my runs on the 680s, it looks like the NOELIA task will complete about 2 hours faster, and the the SANTI task will complete about 1.5 hours faster.

EVGA GTX 780Ti 03G-P4-2883-KR.
____________

Completed times on first WUs:

NOELIA - 18110s
SANTI - 20764s

This is a great improvement over the GTX 680s, however I think I'm now running into one of the issues mentioned above in this thread. After the card running NOELIA finished it started on a SANTI and downclocked from 1124MHz to 980MHz. The other card stayed at it's boost speed of 1137MHz after completing a SANTI and beginning a NOELIA.

I have Nvidia preferences set for maximum performance. Temps are good - the card at 1137MHz is at 70C and the card at 980MHz is at 60C. Utilization for NOELIA/SANTI is still the same.

Edit: Hmm, may have jumped the gun a bit. Rebooted and now back to 1124/1137. Maybe the Nvidia preferences needed a reboot to take effect? I'll have to check again after these WUs finish.

Edit 2: ...and now it has downclocked to 980 again - the same card both times. It is the card I'm running my displays from. Never had an issue with the 680s downclocking.
____________

Edit: Hmm, may have jumped the gun a bit. Rebooted and now back to 1124/1137. Maybe the Nvidia preferences needed a reboot to take effect? I'll have to check again after these WUs finish.

Edit 2: ...and now it has downclocked to 980 again - the same card both times. It is the card I'm running my displays from. Never had an issue with the 680s downclocking.

Temperature is very model, brand and even individual card depending. My primary EVGA GTX660 runs at 75°C steady with radial fan at maximum speed which is 75% for this card and will not become any cooler. But is steady at 940MHz for 6 days without booting. Some WU's, especially Santi's can down clock the card a bit but it will go up again if that WU finishes.
____________
Greetings from TJ

Temperature is very model, brand and even individual card depending.

Why not use HWiNFO and its Sensor logging ?

Why not use HWiNFO and its Sensor logging ?

I have installed it and used it, but the readings differ with other programs that read all sort of system information but especially temperatures differ. I have started a thread about temperature readings and it seems everyone has it own preference for a reading program.
____________
Greetings from TJ

Since your objective is to keep the GPU temperature below a limit then believe the application that reports the highest temperature. If you can keep the temp reported by that app below the limit then you can be quite certain it actually is below the limit.[/quote]

____________
BOINC <<--- credit whores, pedants, alien hunters

I think there's a lot of users logging data using HWiNFO and it can directly draw graphs too. Here's one example, though for AMD, but NV is similar:

I have installed it and used it, but the readings differ with other programs that read all sort of system information but especially temperatures differ. I have started a thread about temperature readings and it seems everyone has it own preference for a reading program.

BTW, I have already contacted the author of BoincTasks about an integration with HWiNFO and he thinks it's a good idea, but is currently very busy. But I think this might be implemented sometime.. would be definitively interesting to see all sorts of sensor information from HWiNFO via BoincTasks.

You're the author, excellent :-) Integration with BoincTasks would be very handy for all BOINC volunteers. BT runs on Linux too under Wine so integration would be cross platform compatible... perfect. I'm moving this "log data and graph it" thing to lowest priority on my "would like to code it" list and I intend to try HWiNFO for Linux ASAP. No, wait!! The hwinfo package for Linux is a different package! Or did you author it for Linux as well? If not then I would be interested in collaborating with you to make a Linux version of your HWiNFO so users can have the same experience on both platforms. First I have other stuff to clear off my plate but perhaps in a couple months...

I was thinking more like I write the Linux version and make it look and feel like the Windows version as much as possible. The collaboration part would involve very little work from you. But that's a topic for a different discussion in a different thread some time in the future. PM if interested or I might PM you about it in a month or so. Right now I'm just discovering the power of GKrellM for Linux. I overlooked it for a while but today the light went on and I realized just how much it can do. It's awesome and will be included in Crunchuntu.

____________
BOINC <<--- credit whores, pedants, alien hunters

I was thinking more like I write the Linux version and make it look and feel like the Windows version as much as possible. The collaboration part would involve very little work from you. But that's a topic for a different discussion in a different thread some time in the future. PM if interested or I might PM you about it in a month or so. Right now I'm just discovering the power of GKrellM for Linux. I overlooked it for a while but today the light went on and I realized just how much it can do. It's awesome and will be included in Crunchuntu.

Under Windows, NVSMI shows the GPU temps and drivers for all cards, and more info for Titans, Quadro's and Teslas.
It's found in C:\Program Files\NVIDIA Corporation\NVSMI (nvidia-smi.exe) and can be accessed from a command prompt in Windows.
I think it might also be found in Linux, but I haven't checked.

I have increased the voltage of my 780Ti to 1.185mV and not rebooted the system. At first this didn't help. Temperature is steady at 72°C with ambient temperature of 27°C.
Eventually clock speed went up to 1032MHz, from 875MHz. It depends on the WU and varies within crunching a WU but clock speed is definitely higher.
The GPU load however is not changing, stay around 75% with a Santi and just over 80% with a Noelia.
The times however have increased with around 2000 seconds. So even for the crunchers with post XP there is hope :)

(I am still not confident enough to go over to Linux.)
____________
Greetings from TJ

Which exact temperatures differ, can you please post which sensor is it and which value? Also what other tools do you use, which show different values ?
I believe most tools use NVAPI to read NV GPU temperatures on later families and so HWiNFO does, so I'm really wondering that there are differences.
Let me know about any issues and I'll look at that, since I'm the author of HWiNFO ;-)

I don't know which sensors are the problem but I find all different reading when checking the CPU temps. You program has a lot of information, which is great!
But I have an Asus MOBO and Asus gives a software package with it for temperature control and readings. However is too high, according to a lot of others with same MOBO.
Then there is CPUID HWMonitor, also used by many, (give very high readings with AMD CPU), CoreTemp32, TThrottle and RealTemp. If I check my CPU temperature with all programs, then there is a range in differences of 13 degrees! So for me, as I don't have the technical knowledge, it is difficult to decide which program I can believe. If I use the hottest I should be safe is the main advice. That is true, but if the CPU runs actually 13 degrees colder, I could set the fan lower which reduced sound. And I don't have to shut down my rigs to often in summer when ambient temps go to 35°C.
Therefore I need to know which program I can trust.

Thanks you for the explanation Mumak.
____________
Greetings from TJ

The times however have increased with around 2000 seconds. So even for the crunchers with post XP there is hope :)

I hope you meant Decreased :)

TJ,

Glad to see you figured out a way to get better performance out of your cards. Mine are at 1187 mV on max boost, so you're probably right where you should be. Your GPU utilization for Santi and Noelia also look about the same as my cards.
____________

Yes thank you Matt. As I saw better times with other crunchers with same OS, it should be possible for me too. And I like to experiment a bit and change only a little at a time to see the results. Perhaps I increase 1 or 2 mV more to see if it can a bit more better. But so far I am happy with the results.
____________
Greetings from TJ

Hi guys :)

I've similar problem with 780ti on Gentoo-Linux

"Long-Run" is very very slow to complete
"Shorts" run fine if I set an app_config 1CPU+1GPU (~ 1h15m - 1h40m)
if run "short" with default value , Wu takes very long time (over 6-8 hours ! )

sometime app_config is skipping and WU's starts with 0.865Cpu+1Gpu

Now I am running "Long-Run" Wu (0.865cpu+1gpu - default) and after ~4h30m progress show me 14%

supsending all other projects (except Gpugrid) this WU after ~ 20min it is at 25% progress

20 min ---> 11% !!

[edit] After a while This WU was gone :(

Now Im'm runnin a new Longrun with gpugrid only

completed this task
Only this task was running in this host


Long Runs Computation time : ~5h

<core_client_version>7.2.0</core_client_version>
<![CDATA[
<stderr_txt>
SWAN : FATAL : Cuda driver error 700 in file 'swanlibnv2.cpp' in line 1803.
# Time per step (avg over 3220000 steps): 1.946 ms
# Approximate elapsed time for entire WU: 18484.331 s
21:41:01 (30309): called boinc_finish

</stderr_txt>
]]>

I finally got a Noelia task on my GTX780Ti,and runs smooth with a steady GPU use of 90% which is way better then the 74% of Santi's and 66-72% of Gianni's.
So not only WDDM is hampering the performance of the 780Ti but also the way a GPUGRID WU is programed. As said before: I like the Noelia WU's.
____________
Greetings from TJ

So not only WDDM is hampering the performance of the 780Ti but also the way a GPUGRID WU is programmed.