My computer turns off while installing windows xp

[double d]

I recently formatted my hard drive, but when I try to install windows xp my computer will automatically turn itself off with no warning. I know this sounds like a power supply issue, but my power supply is 650 watts and not even 2 months old. I took out my gtx 285 graphics card, which hogs a lot of power, but the same thing still happens. I know it's not the hard drive either because my computer did the same thing with another hard drive. All my fans are working fine and nothing is overheating. Here are links to my power supply, graphics card, cpu, and motherboard.

Newegg.com - Antec EarthWatts EA650 650W Continuous Power ATX12V Ver.2.2 / EPS12V version 2.91 SLI Certified CrossFire Ready 80 PLUS Certified Active PFC "compatible with Core i7/Core i5" Power Supply - Power Supplies

Newegg.com - AMD Phenom X4 9750 Agena 2.4GHz 4 x 512KB L2 Cache 2MB L3 Cache Socket AM2+ 125W Quad-Core Processor - Processors - Desktops

Newegg.com - BFG Tech BFGEGTX2852048OCE GeForce GTX 285 2GB 512-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card - Desktop Graphics / Video Cards

::Tyan Computer Corporation:: System Boards detail

 

[SYL\X/3K]

Compare the voltage levels in the BIOS under "hardware monitor" to see if it matches or is close to what it suppose to be. Also what kind of temperatures are you getting from the BIOS for the CPU ?

 

[Press_Corpse]

+1 sounds like a heating issue to me.

What kind of thermal paste did you use?
How much of it was used as well.

 

[baih777]

if you are using more than one stick of ram, try again with only one stick. if it still shuts off then try one of the other sticks of ram.