earwicker7
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I'm overclocking my HD7970s, and I'm hitting a bit of a wall. I'm trying to find out what the max memory clock is using Afterburner/Kombustor; my methodology is to run it in one minute intervals, and if that works, kick it up a notch, try it for another minute, if it fails, boost the voltage and try again (I will eventually run a few 30 minute torture tests once I narrow things down, but that's down the road a bit). I can manage 1825 at 1.174V, so my next move was 1835 at 1.174V, which crashed. I boosted the voltage to 1.181V, and it crashed. Just for the heck of it, I then turned it back down to 1825 at 1.181V, and it crashed. So basically, it will run 1825 at 1.174V but not at 1.181V, which strikes me as a bit unusual, as I usually think of higher voltage as being more stable. This is all with temperatures no higher than 50 degrees. I was able to run my HD5970 at 1.3V for a couple of years with no stability problems at all, so I was assuming I could do the same on the HD7970.
Long story short... is there a possibility that this card just won't go over 1.174V, or is this just a tweaky phenomenon that may just disappear at the next highest voltage? It's two MSI R7970-2PMD3GD5 cards, and I've got a 1500W power supply, if that helps.
Long story short... is there a possibility that this card just won't go over 1.174V, or is this just a tweaky phenomenon that may just disappear at the next highest voltage? It's two MSI R7970-2PMD3GD5 cards, and I've got a 1500W power supply, if that helps.