Hi!

Two GTX 980 on Ubuntu, followed the FAQ guide, work fine. but...
I get 4 GPU WU but only one GPU is running, the (0) GPU.
I tryed to low CPU usage to 50% on WCG WU.... no success here.

Did a need to edit somekind of confing file or maybe connect the (1) GPU to a monitor.

Thank!

Francois,

When you start up BOINC, the Event Log should have 4 lines that look like this:

Thu 13 Oct 2016 01:45:20 PM CDT | | CUDA: NVIDIA GPU 0: GeForce GTX 970 (driver version 361.42, CUDA version 8.0, compute capability 5.2, 4095MB, 4004MB available, 3919 GFLOPS peak)
Thu 13 Oct 2016 01:45:20 PM CDT | | CUDA: NVIDIA GPU 1: GeForce GTX 970 (driver version 361.42, CUDA version 8.0, compute capability 5.2, 4096MB, 4004MB available, 3919 GFLOPS peak)
Thu 13 Oct 2016 01:45:20 PM CDT | | OpenCL: NVIDIA GPU 0: GeForce GTX 970 (driver version 361.42, device version OpenCL 1.2 CUDA, 4095MB, 4004MB available, 3919 GFLOPS peak)
Thu 13 Oct 2016 01:45:20 PM CDT | | OpenCL: NVIDIA GPU 1: GeForce GTX 970 (driver version 361.42, device version OpenCL 1.2 CUDA, 4096MB, 4004MB available, 3919 GFLOPS peak)

Thank alot for the reply Captain Jack,

My two GPU show in the log at start up of BOINC.
I have suspend the WCG projet and now my two GPU are working.
If I resume WCG just one GPU is working.


Surely something about projet priority in BOINC or inside projet setting.

Francois,

I had the same thing happen with WCG recently. Some of the WCG tasks had a short deadline time so BOINC prioritized them in front of the GPU tasks. I had to limit the WCG tasks until they finished so the GPU tasks would keep running. If I remember correctly, the high priority WCG tasks were Fight Aids @ home tasks.

Glad you found a way to get it going.

Remember to open NVidid X Server, goto the Thermal Settings of your GPU's, Enable GPU Fan Settings and increase the fan speed to >70%.

I changed the "Store at least xx day of work" in computing preferences to 0.1 and "Store additional work" to 1. Now everything is crunching.

I'm unable to control or find the fan option in Nvidia X Server...

(0) GPU load at 90% 68C Fan at 50% (monitor connected)Gigabyte windforce.
(1) GPU load at 70% 68C Fan at 20% EVGA SC ACX2.0

The 2 WU are not the same maybe that explain why.
(0) is a SDOERR
(1) is a GERARD

Francois,

To enable the fan control option, you have to set cool-bits to 4 (or greater). Instruction on how to do that can be found in this thread:

http://www.gpugrid.net/forum_thread.php?id=4305&nowrap=true#43503

Once that is set, open up Nvidia X Server Settings, on the left pane right below GPU0 should be an option for "Thermal Settings". Click on Thermal Settings. In the middle of the right pane should be a check box for "Enable GPU Fan Settings". When you check that box, there will be a slider underneath where you can set % fan speed. Same for GPU1.

Hope that helps.

Your solution is under COOLBITS:http://www.gpugrid.net/forum_thread.php?id=3525&nowrap=true#33760
Sorry have not seen that it is alredy answered.

Coolbits worked for the GPU0 fan adjustment but not the GPU1

I connected a monitor to GPU1, but no change.

In the file i have these line did i need to add somehting like another Identifer "Screen1"?

Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "Coolbits" "4"
SubSection "Display"
Depth 24
EndSubSection

I got it... in NVIDIA X SERVER, needed to activate the 2nd monitor, this will add line in the config file for Screen1, so just adding Option "Coolbits" "4" to Screen1 section activate the fan option.

How to save in Nvidia X Server?.... rebooting make the fan setting return to default.

In boinc manager, how many CPUs does it say on each GPU task? 1 CPU + 1NV? 0.5 CPU + 1NV? If you haven't set an app_config file, do so and lower the cpu_usage number to allow for more GPU work to be running at once. I have changed this number before and CPU threads would stop/start depending on the leftover CPU cores left.

<cpu_usage>.25</cpu_usage>

NV settings in linux will have to be reset after each restart along with your OC.