I come from Polish, so at the start I apologize for my language. Namely, I would like to know what gives a better result: 7850 2GB in Crossfire or Radeon HD 7970. Probably I would choose 7970, but today I received a MSI 7850 2gb TFIII who came back from repair and it turned out not that it is out of order and I do not want to wait two weeks for repair again. With us on the Polish side, some write that Crossfire does not work good sometimes and causes some cuttings?.
CPU: Intel Core i5 3570k
Cooler hanteks PHTC14PE_BK
MOBO: Gigabyte GA-Z77X-UD5H
GPU: MSI HD 7850 TwinFrozr III 2GB OC
RAM: 2x4gb Kingston HyperX 1333MHz
PSU: Chieftec Nitro II 85+ 850W
SSD: Corsair Force GT 90GB
HDD: Seagate Barracuda XT 3.0 TB
CASE: Fractal Design Define R4 Titanum z 4x120mm i 2x140mm + controler AKASA
LCD: Samsung SyncMaster 2033HD 1600x900
The two 7850 in crossfire will work better than the 7970 but if you are having trouble with your 7850 i would say go with the 7970 because the 7850s in crossfire aren't that much greater than the 7970.