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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1182

post #11811 of 38704
Quote:
Originally Posted by Grobinov View Post

Its different for all cards really in my case I can get to 1180 core at 1.234V but after that my heat tolerance goes way down. At 1200 core I start to artifact at 62°C so its impossible to reach that clock for me on air. It seems that some card really become sensitive to heat at higher clocks and volts.
I suggest to slowly upping the volts and clocks and see where it leads you. Some cards are stellar but if you are unlucky like me you won't be seeing 1200 mhz on air.
Good luck mate biggrin.gif
Oh yh you can preety much go up to 1.3V if you can keep the heat down or if you dont have a heat sensitive card - as I said before it can be a hit or miss tongue.gif

I must be really lucky with 1205/1770 stable on stock voltages and with the ref cooler. I have to admit i am hesitant on upping the voltages as i heard rumors about the vrms failing with high temps? I wish i had a waterblock so bad as this card is turning out to be an animal biggrin.gif

Also whats your asic value? mine is not that high at 77%, maybe that is something to do with heat sensitivity?
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post #11812 of 38704
Quote:
Originally Posted by BradleyW View Post

It has only started since overclocking the VRAM.

Well it could also be the afterburners fault thats why I always restart it if I'm having clock issues - but I have no experience with CF so my advice is preety much useless here biggrin.gif
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post #11813 of 38704
Quote:
Originally Posted by darkstar585 View Post

I must be really lucky with 1205/1770 stable on stock voltages and with the ref cooler. I have to admit i am hesitant on upping the voltages as i heard rumors about the vrms failing with high temps? I wish i had a waterblock so bad as this card is turning out to be an animal biggrin.gif
Also whats your asic value? mine is not that high at 77%, maybe that is something to do with heat sensitivity?

My ASIC is 75.3% but it seems I have lost the silicone lottery since my core hates heat at above 1200 core.... altho I do have a Dual X cooler so at least my card is quiet but 62C at 1.25V is asking abit much biggrin.gif

VRMS can handle up to 120°C altho its not reccomended to have them running so high. Reference cooler cools them down quite good so I doubt you have anything to fear. You can check the VRM temps in HWInfo64 if you are really worried tho tongue.gif

EDIT: Messed up my edit sorry about the double post
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post #11814 of 38704
Wow... so the ASIC has a lot to do with it... for me the main card is 71 and the second 75. I bet that the 75 one could probably handle way more than the 71.... frown.gif
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post #11815 of 38704
Quote:
Originally Posted by Derko1 View Post

Wow... so the ASIC has a lot to do with it... for me the main card is 71 and the second 75. I bet that the 75 one could probably handle way more than the 71.... frown.gif

Not really... I've seen some nicely clocked 7970 on air here on OCN with ASIC way lower and much higher than me so its not really a good indicator

As far as I know ASIC reading was mostly built around NVidia so its not realy representative for AMD
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post #11816 of 38704
Ok AB won't work now. If i OC via AB, it reduces the usage on my second GPU and will not set the clocks for GPU2, resulting in lower performance. However, the same OC in CCC yeilds far higher fps due to the overclock.

How can i battle this?
Cheers.
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post #11817 of 38704
Quote:
Originally Posted by BradleyW View Post

Ok AB won't work now. If i OC via AB, it reduces the usage on my second GPU and will not set the clocks for GPU2, resulting in lower performance. However, the same OC in CCC yeilds far higher fps due to the overclock.
How can i battle this?
Cheers.

Wonders of Crossfire - hopefully someone with CF experience will be able to assist you here biggrin.gif
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post #11818 of 38704
Quote:
Originally Posted by BradleyW View Post

Right, looks like 1165Mhz is the limit on my core.
What is the average voltage for 1200Mhz+ and what is the max safe voltage for air cooling/long term use.

Yea, you're clear to go up to whatever you'd like as long as you keep your temps in line. On water, I'm running the voltage sliders maxed out (1.3 and 1.7 respectively) and overdrive is 20%.

The other solution to fix the idle clocks is to create two profiles. One is stock clocks, one is overclocked. Then, inside the options of Afterburner, there's an option on one of the tabs to set 2d clocks and 3d clocks to specific profiles. Set 2d to the stock profile so idle clocks go super low, and set 3d to your overclock. You can even have the stock/overclock switch voltage too if you want.
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post #11819 of 38704
Quote:
Originally Posted by JedixJarf View Post

If HWbot accepts it then its good enough for OCN biggrin.gif

That is what I am talking about. Let the pros decide what is legit. cool.gif

NVIDIA probably has some hidden tweaks in their drivers for 3dMark11 anyways. biggrin.gif
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post #11820 of 38704
Quote:
Originally Posted by Feyris View Post

Yes, that is the Sapphire Dual X OC. How can I steal the Bios for you? I will get right on it when I figure out how. Trixx has a save bios feature that gives me a .bin file but I feel like that is not it.

GPU-Z has BIOS save and upload feature. You can save your BIOS and upload it to Techpowerup database.

http://www.techpowerup.com/downloads/2137/TechPowerUp_GPU-Z_v0.6.2.html
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