I'm baffled

[Rayzn]

I recent bought an e6600, a new motherboard, a 650w psu, and 2gigs of gskill ram along with vista. I kept my hard drive and video card. I installed vista and didn't like it so I reinstalled xp and everything was running fine. And then a few days ago I noticed it running a lot slower. Maps would like a while to load while playing CS:S and BF2 and my mouse would cursor would freeze but only the cursor I could still move around. Then I ordered a 8800gts a few days so I did a clean reinstall again and installed everything but my video card drivers because I would have time to use the computer before it came anyways. I installed a few games as well thinking once the card came I could plug it in and install the drivers and I would be fine. Think again, I powered it up and it ran very sluggish, it was running a little sluggish after the second install but I thought it might of been me having no video card drivers on the computer. After a few minutes of using it the computer just shut down. I'm confused as to what is wrong with it.

 

[benzylic]

I'm going to assume that the computer won't turn on at all now.
Maybe the PSU crapped out on you, what brand was it? Do the LED lights on the mobo turn on when you try to turn on the PC, or do any fans spin. I've never heard of a PSU slowing down a computer though.

Now I'm going to assume the computer does still turn on.
You're hard drive may have gone bad, that would slow down your computer.

EDIT: It could be a heat issue, that could slow down the computer with the CPU throttling itself. Make sure the heatsink is on there good and tight.

Either way we need more info and what you tried to do after it shut itself down.

 

[wanderer27]

CTRL-ALT-DEL

See what processes you have running and check if any of them are hogging the CPU.

 

[Rayzn]

Another thing I forgot to add before I got my video card I was installing world of warcraft and it said that my cpu speed doesn't meet the requirement which is clearly does.

 

[mechBgon]

Like mxrider says, confirm that the heatsink is firmly locked down (and that its fan is running properly). CPU overheat can cause emergency throttling and shutdowns. You might want to go into the BIOS and look in the hardware monitoring section for the CPU temperature to confirm that it's in the normal range.

If your computer is in an enclosed space, then also get it out into the open where it can get cool air, and make sure your case's exhaust fan is running normally.

 

[Rayzn]

I just took a better look at it and it seemed a cable might have been blocking the heatsink fan on the cpu from spinning. I am hoping it was that that was causing and i didn't just put it accidently when I just opened the case.

 

[Rayzn]

Another thing, I keep forgetting to tell these things. After the reformat of windows I installed easy tuner, the software that came with my motherboard's cd and I ran the software and there was an option to update the drivers for the motherboard so I did so and when it rebooted some process failed to start up at the boot and it does it at each boot up.