GA-G41M-ES2H video driver not responding

[oleshka]

Hello!

Gigabyte GA-G41M-ES2H F1 BIOS.
2x1Gb Kingston DDR2-800.
DualCore Intel Pentium E5300, 2600 MHz.
Sapphire AMD Radeon HD 6570 (1024 Mb).
Enhance Electronics ATX-0250GA 500W.
WDC WD6400AAKS-65A7B2 (640 Gb, 7200 RPM, SATA-II).
Asus Xonar DG Sound Card.
ASUS DRW-24B3ST.
Microsoft Windows 7 Professional 32 bit Service Pack 1

Video driver does not respond and the computer freezes sometimes with embedded video. Error: "GfxUI has stopped working".

[oleshka]

Motherboard as soon as that of the store.
Voltage on the motherboard power connector, and Sapphire AMD Radeon HD 6570 and Windows 7 Professional 32 bit Service Pack 1 (aero theme):
+5 VSB 5.16V (when the computer is off)
+3 VDC 3.36-3.37 (desktop) 3.35-3.36 (FurMark + LinX)
+5 VDC 5.01-5.02 (desktop) 5.02-5.03 (FurMark + LinX)
+12 V1DC 12.43-12.44 (desktop) 12.33-12.34 (FurMark + LinX)
Temperature by readings of HWMonitor 1.21: hdd 33, video 43, cpu 32 (desktop);
hdd 35, video 76, cpu 46 (FurMark).