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7970 OC question

Luumi

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Hey there. I've got my Sapphire 7970 OC clocked to 1200/1800 using MSI afterburner with 1250mV set gpu voltage and 1630mV memory voltage. However, I'd like to ask if people have found any tricks when going over 1200mhz, since I can't run 3dmark11 stable for example with 1230mhz even with super high set gpu voltage - like 1350mV in Trixx, the voltage will drop to 1260mV under load and I still start to see green and/or red balls in my screen that are massive.

I've used atiman ulps disabling program and I can confirm that Enable_ulps setting is disabled in regedit 0000 and 0001 sections.

Is there anything I could try since, I'd like to try some benching with higher gpu clock to just play around with my hardware or just accept the fact that my GPU won't reach those clocks without hardware modifying and subzero cooling.
Both VRM and gpu temps are ok, like high 50s and mid 60s under load.

Cheers, Luumi
 

the54thvoid

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I have two 7970's. The first one (Powercolor LCS) hit 1300MHz on 1.3v. It's a water cooled card so no probs. I managed a few stable runs on 3DMark11.

My second card (MSI) really struggled to be stable at 1150MHz (under water too). I used the old "/xcl" trick in afterburner to allow me to overclock higher than what CCC would allow with this card but it just didn't like being faster than about 1125. I'd get bad artifacting in unigine and 3DMark11 at higher clocks and voltages.

I'm crossfired now so both are running at a very comfortable 1050 core, 1500 memory.

It is luck of the draw sometimes. But still, if you consider 925 was the initial stock for the 7970, even a 'lowly' 1050MHz is a 13.5% OC.

1200MHz is nearly a 30% overclock - which is silly fast. (But not as silly as a 40% overclock @1300 :cool:)
 

Luumi

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Yeah, it just feels stupid that it wont be stable no matter how much I increase the voltage. My friend got 1300 stable with 1.3v, which feels annoying :< comparing to mine, although 1200 is still a nice overclock as you said.

I'm using mode 2 unofficial overclocking mode and 1025 graphics prosessor mode, which didn't help at all if you ask me.

I don't think ASIC quality has much to do since mine is 81,6% and my friend's is 72% and he gets so much better overclocks than I so, a sad thing :(, both running on air.
 
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1200 is still very high on air and temps not going over 60c i would be very happy if my card could do that.
 
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