I have no idea what's wrong with my PC

[Torpov]

Okay, so long story short: for the past few days, my PC has been acting odd. Mostly graphics drivers crashing, others it'd act sluggishly and take forever to do things. I looked at the temps and the CPU was hitting 130 degrees C, so I figured something with the CPU was up. I took everything apart, dusted, reapplied thermal paste on the CPU, put everything back together, and... nothing. The computer wouldn't POST if I had all of my memory (two pairs of 2gb sticks) installed. Nothing was blocking the slots or anything. If I install one pair, the computer will start. Install the other, it won't. Install any single stick and the computer will start. After it booted, I shut it down and installed the rest. Sometimes it would boot, others it wouldn't. I took the RAM out again and ran Memtest on each, and there were no errors. After that, the computer began booting normally. But now, the graphics drivers (290.something, whatever the newest non-beta ones are) still crash, and now the GPU temperature is increasing.

So here I am wondering what's going on with my PC since the CPU was going nuts, then the memory, then the GPU. I think it's haunted.

Here's what Speccy spat out:

Operating System
MS Windows 7 Professional 64-bit SP1
CPU
AMD Phenom II X4 945: 59 °C
Deneb 45nm Technology
RAM
8.00 GB Dual-Channel DDR3 @ 2499MHz (9-9-9-24)
Motherboard
MICRO-STAR INTERNATIONAL CO.,LTD 790GX-G65 (MS-7576) (CPU1): 59 °C
Graphics
DELL E197FP (1280x1024@60Hz)
1023MB GeForce GTX 560 (EVGA): 70 °C
Hard Drives
596GB Western Digital WDC WD6400AAKS-00A7B2 ATA Device (SATA): 45 °C
233GB Western Digital WDC WD2500JB-00REA0 ATA Device (PATA): 42 °C
466GB Seagate ST3500830AS ATA Device (SATA): 47 °C

[BiN4RY]

It's possible that your case has very poor airflow

[Shadaez]

8.00 GB Dual-Channel DDR3 @ 2499MHz

this is way high, are you sure it's correct? If you have 2500mhz RAM it might be a little unstable... try lowering it to 1600mhz

[Torpov]

It does since it's an Antec P180, but the temperatures have never been [I]that[/I] high, even in the middle of summer.

[QUOTE=Shadaez;38597777]8.00 GB Dual-Channel DDR3 @ 2499MHz

this is way high, are you sure it's correct? If you have 2500mhz RAM it might be a little unstable... try lowering it to 1600mhz[/QUOTE]

Yeah, I noticed that. Speccy has to be misreporting because nothing else says the RAM is that speed.