BSOD/Freeze

Hey guy's I am having some problems while playing under load my screen will freeze and everything gets distorted or I'll get a bsod some times. I'm not sure exactly whats causing the problem because when I did some upgrades i also switched to a newer bios and can't find the old one. Here are specs

Intel Q8300 @ 2.5Ghz
HIS HD 5450
Golden Field 500w PSU
4g ram
ECS MCP73T-AD motherboard
Windows 7 32bit

Now the motherboard I cant seem to find the bios for and this crash randomly happens when playing games and rarely on desktop. I ran Whocrashed and getting these

crash dump file: C:\Windows\Minidump\051112-18142-01.dmp
This was probably caused by the following module: dxgkrnl.sys (dxgkrnl+0x8D07B)
Bugcheck code: 0x116 (0xFFFFFFFF85A95510, 0xFFFFFFFF935A626C, 0x0, 0x2)
Error: VIDEO_TDR_ERROR
file path: C:\Windows\system32\drivers\dxgkrnl.sys
product: Microsoft® Windows® Operating System
company: Microsoft Corporation

crash dump file: C:\Windows\Minidump\070808-15802-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x38C5B)
Bugcheck code: 0xA (0xEE8E, 0x2, 0x0, 0xFFFFFFFF8306D189)
Error: IRQL_NOT_LESS_OR_EQUAL
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System

I thought at first it was video card needing to much power because It only had a 230w so I switched to the 500w. I also tried installing video card drivers again

What's the VID of the chip, and what does CPU-Z show as the current Vcore while running Prime?