My Palit GTX 760 died after four months of 24/7 GPUGrid, but Amazon France gave me a full refund :). So I spent an extra €40 and bought an MSI GTX 770, the one with one fan and which exhausts out the back of the tower; what DO you call that type of GPU???

The 770 arrived today and is busy crunching in 27C ambient. Should I be worried about its 80C temperature?

80c is not a favorable temperature as this can cause errors and potentially shorten the life of the card. Usually it is a good idea to keep video cards at 70c (some may say otherwise) or lower to help lower potential error rates and increase the video cards life.

You can increase the maximum fan speed for your video card, usually 85% or up to 100% depending on the video card, to help lower the temperature. The video card fan speed can be automatically adjusted by using the fan curve feature (button on the lower right hand side) and increase the fan speed or fan curve as the video card increases temperature. If that does not work you can lower the GPU clock offset (if available) or memory clock offset (if available), or power target to slow down the video card and along with the increased fan temperature should bring your video card temperature to the desired temperature. May take some trial and error to get the numbers down as each computer environment is different.

If you have specific questions about adjusting the fan curve, just let us know.

Hm single fan gpus are not the best for full crunching i think. I dont use 7xx cards but all single fan gpus i had are ran over 80degres, with heavy blowing AC sometimes it is a bit under 80. without AC nearly 90 or below. Top is/was 93. But i never had dead cards, but that does not mean this temps are good for them ^^ buut you are only running at 64% fan speed thats not so fast for single cooling. Set it to fixed 70 and i think your fine.
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I have a GTX 770 Classified that ive been using for the past two month. Because it makes my room really warm, I lowered the fan speed and keep temperatures at about 84f. Reading Nvidia's spec sheet, it says max temp is like 95.

I don't think you should be worried too much as long as you do not get GPUGrid errors. GTX 770 is basically a GTX 680 with slightly higher boost frequencies and GPU boost 2.0 that will limit frequencies to avoid temps higher than 80°C (when 680 could go 90°C and more).

I have 2 GTX 770 cards (1150 MHz and 1137 MHz), they usually have temps as below, with fan manually set to 90% :
- 74-76°C for tasks using 350-400 Mo GDDR5 (like SANTI)
- 78-80°C for tasks using 800+ Mo GDDR5 (like BARNA5)
(Maxwell 750 Ti is crazy good : 49-53°C, 1280 MHz on BARNA5, 1306 MHz on SANTI)

In my experience the more video memory a task uses, the higher the temps, sounds logical. Though, I have been too lazy to downclock memory and see if it can decrease temps for high memory tasks.

Thanks everyone for your input :)

I initially ran my new 770 for 24 hours on my spare Dell i7. Two WUs completed and one failed. I then installed it on my home-built ASUS, where it joined my faithful PNY 660.

For the past few days I've been trying to balance three variables:

. GPU temps via EVGA Precision X
. Mobo temps via ASUS Thermal Radar
. Fans noise, to satisfy she who must be obeyed.

I got the fans noise OK and Thermal Radar is just below the 60C warning on PCIE1. Both GPUs are running at 80C in an ambient temp of 26C; it's high summer here in the South of France. I take comfort from the post that says the 770 can go up to 95C. I hope I'm not fooling myself...

As always, I recommend setting up a fan curve that hits Max Fan at approximately 1 degree lower than the temp that limits clocks.

So, for your card, I believe that means having a curve that hits Max Fan at 79*C (since 80*C is where boost starts thermal-limiting on a Boost v2.0 GPU).