I'm working on it for 2 days, but it hopeless...
I used a Sapphire HD5770 in a Gigabyte H55M-USB3 motherboard (Win7 64bit), it worked well. Two days ago I bought an ASUS EAH5770 Cucore card.
- I uninstalled all drivers, deleted all Ati and AMD releated file and registry entry, just as suggested this time
- I put the ASUS card and the CF cable (just one, because ASUS card has only one slot)
- I installed the newest ATI driver pack
Both of cards is working, Catalyst Control Centre shows Sapphire card as "Active", and Asus card as "Disabled".
CrossFire tab in CCC doesn't appear (where it should be?).
GPU-Z shows CF is disabled.
The motherboard is CF compatible but the two PCI Express slot is not same:
- 1 x PCI Express x16 slot, running at x16 (PCIEX16) (Note 5)
(The PCIEX16 slot conforms to PCI Express 2.0 standard.)
- 1 x PCI Express x16 slot, running at x1 (PCIEX4_X1)
GPU-Z shows the PCI bus statuses:
Sapphire: PCI-E 2.0 x16 @ x16 2.0
ASUS: PCI-E 1.1 x16 @ x1 1.1
This would be the problem? I don't know these bus and crossfire compatibility conditions.
Or something else?
I tried to change the cards, the PCI statuses doesn't depend on the card, and the problem persists.
I used a Sapphire HD5770 in a Gigabyte H55M-USB3 motherboard (Win7 64bit), it worked well. Two days ago I bought an ASUS EAH5770 Cucore card.
- I uninstalled all drivers, deleted all Ati and AMD releated file and registry entry, just as suggested this time
- I put the ASUS card and the CF cable (just one, because ASUS card has only one slot)
- I installed the newest ATI driver pack
Both of cards is working, Catalyst Control Centre shows Sapphire card as "Active", and Asus card as "Disabled".
CrossFire tab in CCC doesn't appear (where it should be?).
GPU-Z shows CF is disabled.
The motherboard is CF compatible but the two PCI Express slot is not same:
- 1 x PCI Express x16 slot, running at x16 (PCIEX16) (Note 5)
(The PCIEX16 slot conforms to PCI Express 2.0 standard.)
- 1 x PCI Express x16 slot, running at x1 (PCIEX4_X1)
GPU-Z shows the PCI bus statuses:
Sapphire: PCI-E 2.0 x16 @ x16 2.0
ASUS: PCI-E 1.1 x16 @ x1 1.1
This would be the problem? I don't know these bus and crossfire compatibility conditions.
Or something else?
I tried to change the cards, the PCI statuses doesn't depend on the card, and the problem persists.