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HD7970 Sapphire (ref) Asic 88%, bad for Overclock?

post #1 of 3
Thread Starter 
Received from a friend, Sapphire HD7970 reference with ASIC of 88% to be replaced by my Gigabyte HD7950 with WF3 asic 64%.
I'm having trouble to oveclock this card. When i set 1100/1600 1.25v i got BSOD, the problem is not in memory, since I already tested the overclock only in memories and it worked perfectly.
The board can spend hours running Furmark, MSI Kombustor or OCCT, but a few minutes in Starcraft 2 or Dayz so I receive vpu recovery or worse, BSOD.
I received a BSOD in AIDA64 stressing the VGA only increasing the Power Control to +20.
The temperature with the cooler running 100% quite hit 90º Starcraft2 and VRMs 100º, I do not know if it's worth I keep this card and buy a new cooler, or if I better stay with my current VGA GA HD7950 WF3.

It is possible that it is really bad for overclocking with a 88% asic? my idea was to get a higher overclocking with this card. mad.gif

I noticed that the voltage at GPUz plate reaches vary up 1.495ve this is very strange.
When I change the voltage to 1.25v or 1.18v or 1.10v for example, just take me to the voltage of your standard range is 0.9V to her até1.495v. I think that is causing the BSOD.
I've tested the bios GHz ATI official who took the TechPowerUp, but had the same problems.
With my Gigabyte and with 1100/1575 with 1.18v, do not know if I should change then the
Can you help me? I have to decide today.
Sorry for my bad english.
post #2 of 3
You need to cool the card better.

90c is to hot for that card.

Get a aftermarket cooler or waterblock.
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post #3 of 3
High asic cards are hotter. Also they use a lot less volts but they scale worse with more volts. Golden card for mining not that much for water or extreme oc
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