Hi
I recently brought a SSD which uses a PCIe link card which requires PCIe 4X to work.
My motherboard already plugged with 2 ATI 5970 graphic cards under PCIe setting of 16x 16x 1x
I plugged the SSD link card (raid card) to the 3rd PCIe slot and went to Bios and change the northbridge chipset > PCI Express Selector, from [auto] to 16x [8x 8x] (options are auto, 16+8+8, 16+16+1)
After bootup, everything is working good, except when I begin to test the crossfire using 'Alien vs predator benchmark'
When going in crossfire mode, i can see the ATI crossfire logo on topright corner, and i can see there are activities under each of the 4GPUs. However, the screen flicker every frame, like odd frame's resolution is different from even frame's resolution.
I also tested with 'Heaven' benchmark tool, same thing happened.
By disabled crossfire, the flicker gone, but i don't want to just use single GPU instead of 4 i owned
I checked and already changed the crossfire bridge which links the 2 cards
I reinstalled CCC and also went back to 10.11 from 10.12
I swap the 2 5970 cards from the motherboard
I even did a clean install of windows7 and then CCC
problem still there
I read some suggestion about down tune the memory clock to 900MHz to fix flicker problem, but under CCC AMD overdrive, the min Memory clock is 1000MHz
So my question, does 5970 crossfire need run on 16x + 16x PCIe? or am i doing anything wrong?
Current Config:
Win 7 x64 Ultimate
Intel i7 Extreme i7-975
ASUS P6X58D Premium http://ca.asus.com/product.aspx?P_ID=wurRaDZ8lo4Ckukj&templete=2
ATI 5970 + ATI 5970
OCZ IBIS 3.5" HIGH-SPEED DATA LINK SSD
Intel X25-M 160G
WD Black 2T
6 X 2G Skill DDR3-2000
22" + 30" +22" (1680x1050 + 2560x1600 + 1680x1050)
Thanks very much for your time
I recently brought a SSD which uses a PCIe link card which requires PCIe 4X to work.
My motherboard already plugged with 2 ATI 5970 graphic cards under PCIe setting of 16x 16x 1x
I plugged the SSD link card (raid card) to the 3rd PCIe slot and went to Bios and change the northbridge chipset > PCI Express Selector, from [auto] to 16x [8x 8x] (options are auto, 16+8+8, 16+16+1)
After bootup, everything is working good, except when I begin to test the crossfire using 'Alien vs predator benchmark'
When going in crossfire mode, i can see the ATI crossfire logo on topright corner, and i can see there are activities under each of the 4GPUs. However, the screen flicker every frame, like odd frame's resolution is different from even frame's resolution.
I also tested with 'Heaven' benchmark tool, same thing happened.
By disabled crossfire, the flicker gone, but i don't want to just use single GPU instead of 4 i owned
I checked and already changed the crossfire bridge which links the 2 cards
I reinstalled CCC and also went back to 10.11 from 10.12
I swap the 2 5970 cards from the motherboard
I even did a clean install of windows7 and then CCC
problem still there
I read some suggestion about down tune the memory clock to 900MHz to fix flicker problem, but under CCC AMD overdrive, the min Memory clock is 1000MHz
So my question, does 5970 crossfire need run on 16x + 16x PCIe? or am i doing anything wrong?
Current Config:
Win 7 x64 Ultimate
Intel i7 Extreme i7-975
ASUS P6X58D Premium http://ca.asus.com/product.aspx?P_ID=wurRaDZ8lo4Ckukj&templete=2
ATI 5970 + ATI 5970
OCZ IBIS 3.5" HIGH-SPEED DATA LINK SSD
Intel X25-M 160G
WD Black 2T
6 X 2G Skill DDR3-2000
22" + 30" +22" (1680x1050 + 2560x1600 + 1680x1050)
Thanks very much for your time