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Most 6950s VRAM can probably clocked way higher

post #1 of 7
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I found using GTA4, and then furmark, that 1520 MHz was about my highest stable VRAM, it never artifacts at that speed, and the longest furmark test was ~2h until I stopped it.

I use TRIXX for the clocks since its OC limits are 1200/1600

Here's some driving around and a rampage in GTA4 with 947/1520 @1.2V, I'm pretty sure one of these must be the memory temp on my non-ref card



I don't know what the safe VRAM temps are, I only use 947/1520 for GTA4 and crysisWH, but it helps for sure

A lot of people list 13xxMHz in their sigs, have you actually tried higher, they can probably do a lot more

(Also I can't wait for a BD, so that I can get over about 50-70% average GPU load, and also CF)
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post #2 of 7
1520 is insanely high... mine won't go over 1400

although my core can handle 1020mhz.
post #3 of 7
With the error correction you're not likely to see artifacts.

You should do a Vantage run to see if ecc is kinking in, note any performance drop offs.
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post #4 of 7
Any good research done on the error correction etc. Like a review of the different frequencies. Or will it be completely random with every chip.

rule of thumb??
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post #5 of 7
Quote:
Originally Posted by noahhova View Post
Any good research done on the error correction etc. Like a review of the different frequencies. Or will it be completely random with every chip.

rule of thumb??
Pretty random really, each and every card is different.

Vantage is a really good indicator of memory correction, I'll lose about 3k on my gpu score if ecc is kicking in.
Just watching it run and I'd never know.
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post #6 of 7
I get artifacts in Kombuster at 1400, so I've kept mine at 1375... I'm more than happy with that performance!

Core around 1000 @ ~1.25 I get crashes, so I've just left it at 900/1375. Can't go wrong, a heckuva lot more performance than I laid out for!
post #7 of 7
Got 6 cards, 5 clock 1450+ 1 does 1400 only.
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