Will start of with a bit of PC specs:
It's a Dell Dimension 9100 from 2005, 3.2GHz P4, 2GB RAM, 160GB SATA HDD, Ati Radeon HD 4350 512MB GFX card.
To the problem, however not a necessity to read if you don't care about the background story:
From out of nowhere my computer freezes. I shut it down, and try to start it back up. Dell screen loads with a huge amount of artifacts all over the screen. It changes over to the XP loading screen, with a huge amount of artifacts there as well. After it has loaded, the screen goes blank and the screen shuts off (button on the screen turns from green to orange). I figured it was the graphics card, so I went and bought a new one (the 4350) to replace it with the old nVidia GeForce 7800GTX 256MB card that was in before. Said and done, the computer started up. Happy as I was, I tried to put some pressure on the graphics card just to see what it could do; if it was any better than the older one.
After I while it started smelling burnt. I immediately turn the computer off and feel the PSU. It was extremely hot. I let the computer rest for a while (about one hour) and then turned it back on. It ran fine this time. No temperature rise or anything. Then went out for a while (turned it off before I went out) and then came back home and turned the PC back on. This time, the PSU fan wouldn't spin. After about a minute or two, it started spooling up.
This morning, I started the computer and went in to take a shower. After about 15-20 mins, I come back and I can feel that burnt smell again when I entered the room. Took the side cover off, and the fan wasn't spinning. I shut the PC off, and restarted it after about 10 mins. I looked at the fan while the PC was starting, and it had problems coming up to speed. After half a minute or so, it got up to speed. I fear the PSU is failing.
I believe I need to replace the PSU in this Dimension 9100, however I hear that a Dell is a ***** to replace components in. I also read something about replacing the PSU only with an "ATX" PSU. What's an "ATX" PSU, and what's the difference between an ATX and a "regular" one?
I was thinking about this one: "Corsair PowerSupply (PSU) 650W TX ATX". Will it fit?
Any help is greatly appreciated, Thanks!