HD 6990 Preview/Review

[Heinz68]

I just got my new Sapphire 6990 today.. And I am not getting a very good OC score. First one is with 2600K @ 4.5Ghz memory 2133MHz 7-10-7-21 1T and 6990 stock 830/1250 scored a 34,381 then I ran it with same setting, but with new 6990 at 970/1300 only a 34,543
Could it be new drivers issue, or CPU bottle neck? Not a very big jump with a high OC compared to my 5970 card stock vs high OC.. Am I missing something here...

And for the record the card at 100% fan speed sounds like a freaking leaf blower on steroids.. But beside going def in my left ear, the card never really got hot on my benches 59C or lower..

No I never did flip the switch I wanted to see if it would work through the ATI control center, but after reading I need to flip the switch, but by doing this voids the warranty and I wanted to see how great of a card it is compared to the 5970.

Where did you read that using the BIOS switch voids the warranty? The BIOS switch sets the clock and voltage to HD 6970 level and the card is design for that. It does not make any sense to put the switch there if it voids the warranty.

Yes I believe some crazy OC which would need much higher voltages than the switch provides could void the warranty.

What voltage settings did you use for the 970/1300 OC? Why did you use 100% fan speed even for reference settings clocks.

Anyway my HD 6990 is in the mail so I should find out soon by myself.

EDIT
Just finished reading the HardwareCanuck review about the HD 6990 OC, you need to use the switch for higher OC also didn't know about the CCC Power setting slide which is new, probably for the HD 6990 only.