PC crashes when gaming

HT is HyperTransport bus, for some reason the information on there is compromised.
Mostly this is due to:

1 Ram running wrong timings or broken

2 Powersupply not delivering enough stable power

3 Broken CPU

4 Broken videocard or other PCIe device

5 Broken motherboard

It's normally not caused by drivers or BIOS revision.
But if you think it is, verify against XP 32bit, see if it happens there too.
Swap parts until you found the guilty part, not much more you can do.

first thing i would do, is check your ram timings and voltage in the bios, make sure they match up to what the stick can handle, next i would check the CPU voltage, make sure power saving features are off, and the voltage should be over 1.3v @ 3.0ghz (i think, 1.425 is nominal?)

next if that all fails, try another stick of ram.. what brand is your ram? make/model?

if that fails or you have no other memory to try, take the sapphire out and give it a good looking over, make sure theres no buldging or exposed capacitors.. if thats good, keep it out, and try your onboard video for a while, see if you can get it to crash using your onboard video.. if you have another video card, test it in there instead, see if u can get a crash.. its a pretty complex problem it sounds like, it will take time to trouble shoot it probably.

also check your bios version your running, you may need an update, it has helped some others with that problem

ok,I have also googled about the problem and found that many parts can cause the problem.so I started with the psu and got the following information from bios
vcore:1.384
3.3v :2.294
5v:4.924
+12v:11.880
so, are these reading normal?
what energy saving feature should i turn off. is spread spectrum one of them?
my bios version is the latest from msi

no, things like cool n quiet technology, what dooes cpu z say yer voltage is? cpu voltage i mean.. what are your ram timings in the bios? auto? give all the bios settings u can.. cpu vcore, ram volts, ram timings multiplyer, ht nb voltage and multiplyer, every thing

your 3v rail is a bit low, 2.29 isnt right, should be closer to 3.0 what does hardware monitor say your voltages are in windows? cpuid hardware monitor

oops! it was 3.29 not 2.29
I dont know how to check RAM timing but but its a Apacer DDR3-1333 RAM.
in bios DRam timing is auto. i used cpu-z to see it.
It says

SPD Tab
Module size: 4096 MBytes
Max bandwidth: PC3 10700(667MHz)
Manufacturer: Apacer technology

Timing table:
JDEC#1 - JDEC#2 - JDEC#3 - JDEC#4
Frequency: 457MHz- 533MHZ - 609MHZ - 685MHZ
CAS# Latency: 6.0- 7.0- 8.0- -9.0
RAS# to CAS#: 6- 7- 8- 9
RAS# Percharge 6- 7- 8- 9
tRAS: 17- 20 - 22- 25
tRC: 23- 27- 30- 34
command rate:
voltage: 1.50- 1.50- 1.50- 1.50

MEMORY Tab

Timings
DRAM frequency: 666.8 MHZ
FSB : DRAM : 3:10
CAS# latency(cl): 9.0 clocks
RAS# to CAS#(tRCD): 9 clocks
RAS# percharge(tRP): 9 clocks
Cycle time(tRAS): 24 clocks
Bank cycle time(tRC): 33 clocks
Command rate (CR): 1T
DRAM idle timer:
Total CAS#(tRDRAM)
Row to column (tRCD):