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Grabbed a decent Firestrike Ultra 4K score just now
http://www.3dmark.com/fs/4550809
Still some more tweaking can be had. Card hit 35 degrees with the radiator fans on full pelt.
Finally decided to install the Kraken G10 on my top 980 as the 80c temp in Far Cry 4 was getting to me too much I needed to cool. Top 980 was 80c bottom 980 was 70/71c
Took off the G1 cooler and they seem to have overdone it a bit with the TIM. I was also surprised that the heatplate for the VRM's did not make contact with all of them fully. The indentations on the right showed only half of the chips were touching it.
Decided to try it with the backplate on as the bolts were just long enough for me to turn the hand screws on and tighten them. Once it was assembled I then took the pump back off to make sure I got good contact with the GPU then re-applied the pump again.
The VRM's were the biggest problem so in the end I used a combination of RAM heatsinks and the VRM cooler from the Gelid 290x kit.
Switched back on and it seems to have balanced the two 980's temperatures. Before the top one was always about 10c hotter even at idle (which is what I saw with my 970's) now they idle the same temperature. Fired up Far Cry 4 and after about an hours gaming checked the temps and the top one maxed at 70c and the bottom one was the same. So good result for me. The radiator only has a case fan pointing at it running at constant 800rpm so to get 70c is pretty good. If I change the fan for a higher static pressure one and possible knock it upto 1000rpm could get lower temps.
Anyway here are a few pics
Reasons I did it.
1. Cost of full water loop
2. Poor mounting options for radiator in case and hassle of building/testing/maintaining
3. Already had the G10's and a H55.
It was only easy to fit because I had done it several times before with my 970's. Its fiddly to get the pump fitted onto the G10 onto the 980 but as I had done it a few times before I got the knack. Biggest problem is length of pipes on Corsair AIO they are just too short.
Must admit was expecting a bigger drop in temps as my top 970 dropped 20c but that was using the X41 I suppose with the bigger radiator (the one on the CPU). I think its worth it as I got a 10c drop and quieter case. Dont forget this is Far Cry 4 I've not see what temp drops I get in other games. The fans at 80c are quite loud. Might see what a X41 would do. Basically its balanced the two gpu's temperature wise, dropped the top one 10c and thats with a 1506mhz/7600mhz overclock too. So in reality the temperature drop might be a bit more if I moved the GPU's back to stock. As for aesthetics I dont really mind because the case has no window and I dont pay too much attention to whats inside apart from it being tidy. ie could have done with a red 120mm<>140mm adaptor but they were out of stock
You should get loads lower than that.
My 980 max's at 50C 100% gpu usage with my H55 and kraken.
I have 980 SLI. Makes a difference when you have a hot GPU below another! Also please note my temp stated was in just one game, Far Cry 4. I just ran 3dMark 11 3 times and the max temp on the top one was 63c.
Like I said I do have a few things to improve it like change the fan on the radiator.
Mine sit mid 50's in Hardline etc and under water. Fans are turned right down though.
Must be something odd going on with FC4 as I just ran 3d Mark for an hour and the top one maxed at 59c. Its now idling cooler than the bottom one by 3c. Maybe it had not settled in yet and still had air in the loop as it had been given a bit of a shake and had been sat for a month or so.
Anyone tried FC4 with their 980(s) under water ?
edit: Just played for 15 minutes and its 60c whereas before it was 75c and climbing. Maybe I was right about the air.