I recently bought a second 2gb Hd4850x2 to quadfire I have enabled all 4 gpus in CCC it has decreased performance while gaming compared to my old single 2gb hd4850x2 I disabled two of the gpu's and performance was back to where it was but I ran MSI afterburner and the onscreen display server and it only shows one gpu running I'm not sure whats causing the problem I tested my gpus in GPUZ and they all work PLEASE HELP this is my driver- Driver Packaging Version 8.821-110126a-112962C-ATI
Catalyst Version 11.2
Provider ATI Technologies Inc.
2D Driver Version 8.01.01.1123
2D Driver File Path /REGISTRY/MACHINE/SYSTEM/ControlSet001/Control/CLASS/{4D36E968-E325-11CE-BFC1-08002BE10318}/0002
Direct3D Version 7.14.10.0812
OpenGL Version 6.14.10.10524
Catalyst Control Center Version 2011.0126.1749.31909
AV Stream (T550 Pro) Driver Version 6.14.10.394
Catalyst Version 11.2
Provider ATI Technologies Inc.
2D Driver Version 8.01.01.1123
2D Driver File Path /REGISTRY/MACHINE/SYSTEM/ControlSet001/Control/CLASS/{4D36E968-E325-11CE-BFC1-08002BE10318}/0002
Direct3D Version 7.14.10.0812
OpenGL Version 6.14.10.10524
Catalyst Control Center Version 2011.0126.1749.31909
AV Stream (T550 Pro) Driver Version 6.14.10.394