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Project: Cooling the MSI R7970 TF 3GD5/OC BE with Arctic Accelero Xtreme 7970 plus Extra Heatsinks for VRMs - Page 2

post #11 of 36
btw what are your vrm temps with just the stock heatspreader?
post #12 of 36
here is a quick run through 3dmark 11. Clocks at 1200/1600@1.250v. max gpu1 was 48, max gpu2 was 47. Vrm gpu 1= 58,47 VRM gpu 2 = 62,45.
post #13 of 36
so would you say the following screenshots on their for sale website are correct for vrm temp?
http://www.swiftech.com/hd7900-hsf.aspx

also what type of cooling are you using to cool the brms besides the heatsink?
post #14 of 36
Just the stock heat plate with the stock fan. I'm SURE my temps. Would be MUCH higher if I ran the same test with furmark. It by far produces the highest temps. I imagine their data is accurate. Not sure if those heatsinks will fit with an AIO cooler or not. It's made for their universal water blocks.
post #15 of 36
btw what is he stock voltage on the 7970 and what did you use to overclock it to those settings?
post #16 of 36
It's a 7950. Stock voltage on my two cards are 1.094v. I modified the bios to boost the power tune to +50. It doesn't need that much, but why not? Then just after burner beta version. Adjusted the core voltage to 1.250 to hit 1200 and memory voltage is stock.

If you are gunna overclock see what you can get out of it without raising the voltage. I don't know what your stock voltage is so you may not need to raise it much to achieve a pretty good overclock. If you are gunna raise voltage do it in SMALL increments and watch core temps and vrm temps closely!
post #17 of 36
so you essentailly have a 7970? (7950 at 7970 speed)? I have the same card but 7970, i was curious what i could expect.
post #18 of 36
I would assume it outperforms a 7970 clocked at stock speeds. There are two of them in crossfire so obviously together they definitely outperform a single 7970. But yea, I would think one of my cards at 1200/1600 would outperform some 7970's if they were clocked at their stock clocks. Every card performs slightly different but you definitely will see performance gains with overclocking. I would be a little concerned with the vram being naked. Get some heatsinks or modify the stock heatsink like I suggested so you can have some cooling and a fan blowing on the vrm's atleast.
post #19 of 36
I'm going to run some benchmarks at different clock speeds and I will post results for you. I'm going to try a 1300 mhz run first.
post #20 of 36
ordered this to hopefully take care of the vrms, please give me your opinion, this plus h60 watercooler.
http://www.swiftech.com/HD7900-HSF.aspx

also could use some advice on what to heatsink on the back of the card (non gpu side), have some extra expensive little copper heatsinks with little needle fins upto 14mm.
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