Hi everyone im new to the forum and i actually joined because this is bugging me so much!!
2 Days ago my 2 new Twin Frozr ll R650 GB cards arrived and i couldnt wait to get going!
So i uninstalled all drivers from previous card (hd 4890) and installed both cards into the x16 lane slots and attached the crossfire bridges. Installed new drivers and couldnt wait to play a game so i logged onto wow and i had worse fps than
my previous card!, 35 fps on max settings.
I then decided to run 3dmark11 and 3dmark vantage benchmarks and scored very low compared to similar systems. I then ran a benchmark just with 1 card and scored low again.
I am really frustrated as i have spent alot of money on these 2 GPU's and really need all the help i can get, i do have descent computer hardware and software knowledge but its not good enough in this case obviously!
Custom Built System Specs:
i7 920 stock at 2.66 GHZ
Asus P6T SE Motherboard
HIPER S625 PSU
I did have a suspission that it may be the psu but results show that the hd 6950 is less power demanding than my older hd 4890. So what could be the problem?!
okay found your psu...650 watts if I'm correct...it may be just that...your card is rated to have a 500 watt or greater w just one card so the 6950 is designed to back throttle if it cant get the power it needs...this may be the problem...I wld def look into a better power supply...corsair has a fgew good ones that are 750 watts...even 800 wld be a good safe bet...
your i7 and psu is bottlenecking your dual gpu config. To check if this is true remove one gpu and run the same benchs .Fresh install the latest ati catalyst driver. Upgrade your psu because your dual gpu needs more head room.OC your cpu to 3ghz
Could you do us all a favor and post your 3dmark11 score and or vantage score on normal performance setting.
It is quite normal and expected that anyone running at stock settings will get a "your system is performing below others with a similar system". This is because most their database is based on overclocked systems.
You also did not mention brand on that 625w PSU. That is below the recommended power, and unless it's a good brand, it unlikely enough.
It would also be helpful if you downloaded GPU-Z and posted some screenshots for both cards. I'm most interested in what the bus interface says.