I am running three EVGA GTX 980 reference super clocked cards. The cards run at 1240 core clock and are supposed to boost to 1396. The two lower cards do boost to 1396 but sometimes the top card hits 1497 in heavy gaming. I am running stock super clocked cards with no tweaking or over clock on my part but why is the top card boosting more than it should at times while the other two boost normally?
With the 980 it will keep increasing the clock speed until your hit the TDP or Temperature Limit for that card. If one card has a better GPU that uses less voltage it will run at a higher clock speed.
According to EVGA's website, your GPU's boost clock is 1367, not 1396. If it's going that high (to 1497), then you must have some overclocking enabled.. I have two GTX 980 FTWs, and the boost clock takes them to 1392 MHz. Usually you get less boost in SLI mode, compared to running them in single card configuration.
Are you watercooled? I just tested mine in single card configuration, and the max boost clock was 1430, which is quite a bit higher than in SLI which was 1392.. And since you have Tri SLI, your boost shouldn't be that high at all.. Or maybe you just lucked out and got herculean GPUs
Here are 4 EVGA SC 980s the same as the OPs running stock They were running the Heaven 4 bench @2160p maxed for this test. At stock they were all pretty close together but when overclocked GPUs can reach different boosts depending on the silicon lottery.
No, just standard reference coolers, no water. When the top card boost to over 1400 it temps out at around 74c.
That's a little odd... I thought in SLI the clocks of the 'better' cards would adapt to work with the clocks / boost frequency of the lowest clocking card, as in the worst clocker. Well, I guess I was wrong
I read it on the Nvidia page, so I thought it was that way. Maybe I'm getting Teisco wrong, but to me it reads like one of his three cards runs a different boost than the others during use.
The only explanation I have would be if the game does not properly support SLI but I cant remember that I've experienced this. Weird
High temps I have a single gtx 980 and when I boot the temps go up to a stable 60C. the gpu fas start to blow. After some time (a few hours) while Ive been playing the temps will drop to low/mid 40C. Ive noticed that the vol/clocks go down as well. What im wanting is the clocks to start low and go up if and when needed. Ive tried using after-burn and gpu tweak and both will not adjust the settings. So im stuck. Any help is good guys.. postimg.org/image/kdcqelbep/
