Sapphire 7970 OC dual x

Hej!

Jag har köpt 7970 innan 2 veckor sen, men idag så de visar
"Low FPS drop" Glitchy eller pixelated screen...
De hender bara med BF3 :/
Jag har testad de med Crysis 1 & 2 och de händer inte så.

(BF3 settings ultra + blur off)
FPS jag får Average FPS 63 men jag skulle få 80+ FPS

Link1:

Link2:

Glichy saken är inte över HUD bara I spelet, tror jag

shnälla hjälp mig.

PC info:

Processor Information:
SPU: I5 (MAX 55c temp)
Speed: 3200 Mhz
4 logical processors
4 physical processors

Network Information:
Network Speed: 100MB/s up 10MB/s

Operating System Version:
Windows 7 (64 bit)
NTFS: Supported

Video Card:
Driver: AMD Radeon HD 7900 Series

DirectX Driver Name: aticfx32.dll
Driver Version: 8.981.2.0
DirectX Driver Version: 8.17.10.1136
Driver Date: 26 June 2012
Desktop Color Depth: 32 bits per pixel
Monitor Refresh Rate: 75 Hz
DirectX Card: AMD Radeon HD 7900 Series (MAX 53c TEMP)
Number of Monitors: 1
Number of Logical Video Cards: 1
Desktop Resolution: 1440 x 900
Primary Display Size: 20.00" x 12.52" (23.58" diag)
50.8cm x 31.8cm (59.9cm diag)
Primary VRAM: -1024 MB

Sound card:
Audio device: Speakers (3- Logitech G35 Heads

Memory:
RAM: 8151 Mb

Total Hard Disk Space Available: 1984043 Mb
Largest Free Hard Disk Block: 728183 M