vtx3d hd7870 x-edition 2gb help

sundays

Honorable
Oct 15, 2013
10
0
10,510
Hello
I upgraded my video card to an vtx3d hd7870 x-edition 2gb getting powered by an coolermaster 450w bronze
When playing more demanding games the computer crash!
I did run 3dmark test and video card passed without errors reported.
my question is if i need to change my PSU for a stronger one or there is other tests that i can run to make sure my video card is ok?
the video card was bought new 3 months ago...

many thanks
 

sundays

Honorable
Oct 15, 2013
10
0
10,510
Motherboard: gigabyte gama785gm - us2h
processor: amd phenom II x6 1090t (3.2 - 3.6 turbo)
Ram: 4 gb ddr2 1066 corsair cm2x2048-8500c7
PSU: coolermaster 450w bronze single rail 12v 35A
video: vtx3d hd 7870 x-edition 2gb
hdd: 500gb 7400 rpm seagate
640gb 7400 rpm wd
other parts:
samsung bluray
dvd writer
6x120mm fans

hope this help
thanks