That explains a lot. The machine looks new enough to make this a warranty issue. Even if you built it.
Nothing jumps out except the comment on clock speeds.
I'll keep this simple by giving the facts; my computer is custom built, it's not cheap and it's absolutely fit for gaming. The computer itself runs extremely well as I use it mainly for designing, music and internet. The only issue is that when I'm playing specific games, even on the lowest settings, it causes my monitor to go black and my fans to speed up. I have to then reboot the computer, which anyone with Windows 7 knows is a hassle. I've attempted to play games with multiple graphics cards but no matter what I do it's always the same. I can run The Sims 4, Tomb Raider and Fable III on max graphics just fine but when I run Half-Life 2 on the lowest graphics it crashes pretty quickly. I've set my core clock to 405 MHz and my memory clock to 1000 MHz, which has helped significantly, but the problem still persists. I'll give my specs below and if anyone can help me I'd be very appreciative. I'm willing to go out and buy another motherboard or a processor if that's the case, whatever it takes to make my gaming machine actually game.
<span>Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.140303-2144)
<span>Language: English (Regional Setting: English)
System Manufacturer: GBT___
<span>System Model: NVDAACPI
<span>BIOS: Award Modular BIOS v6.00PG
<span>Processor: AMD Phenom(tm) II X4 925 Processor (4 CPUs), ~2.8GHz
<span>Memory: 8192MB RAM
Available OS Memory: 8192MB RAM
Page File: 3170MB used, 13210MB available Windows Dir: C:\Windows
DirectX Version: DirectX 11DX
Setup Parameters: Not found
User DPI Setting: Using System DPI System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode
<span id="INSERTION_MARKER">Card name: NVIDIA GeForce GTX 580