I'm currently at driver 12.8 because its the most stable one for me, after trying to upgrade to 12.9 it gave me this kind of image

http://puu.sh/1TFbl  - same thing happened with .10, .11 and .12

So I tried 13.1 which is the latest, the same thing happened

http://puu.sh/1TF98

I can't go beyond 12.8 because everytime I try to upgrade my driver it gives me this kind of display.

Anyone knows what the problem is and how I can fix it?

My spec:

Operating System
    MS Windows 7 Ultimate 64-bit SP1
CPU
    Intel Core i7 920 @ 2.67GHz    44 °C
    Bloomfield 45nm Technology
RAM
    6.00 GB Triple-Channel DDR3 @ 532MHz (8-8-8-20)
Motherboard
    Gigabyte Technology Co., Ltd. EX58-UD4P (Socket 1366)    40 °C
Graphics
    H243H (1920x1080@60Hz)
    AMD Radeon HD 6900 Series (Sapphire/PCPartner)    44 °C
Hard Drives
    932GB Western Digital WDC WD1001FALS-00J7B1 ATA Device (SATA)    41 °C
Optical Drives
    NUF JW1A3KLQ SCSI CdRom Device
    HL-DT-ST DVD-RAM GH22NS30 ATA Device
Audio
    AMD High Definition Audio Device

Install a driver which produces the effect seen on those pictures and check

1. Idle GPU/memory clocks

2. Idle GPU voltage

3. Idle temperature

4. Load GPU/memory clocks

5. Load GPU voltage

6. Load temperature

7. PCIe speed

8. LEDs on the card

9. Event viewer in windows for suspicious errors.

Do you see anything strange (except for the image quality of course).

CPU: AMD Phenom II X4 810 @ 3250MHz | RAM: Kingmax 2x2GB DDR2 800 @ 833MHz| MoBo: MSI K9A2 CF v1.0 (BIOS: 1.D)| GPU: Asus HD 6850 1024MB (DirectCu) @ 850/1100MHz | Display: L24FHD | PSU: PC Power & Cooling Silencer 750 Quad | OS: MS Windows 95 x64 Edition, Lubuntu 13.04

CPU: Pentium 4 Northwood S478 @ 3200MHz | RAM: 1,5GB DDR 400| MoBo: Gigabyte GA-8S661FXMP-RZ | GPU: Abit Geforce Ti 4200 | Display: Dimarson 19" CRT | PSU: Noname 400W | OS: MS Windows XP Pro, Lubuntu 12.04

Sorry for the very late reply, I haven't had time to do so - I'll try to post later.