I'd check and make sure you didn't bump the case and the pushpins on the heat sink didn't get displaced from the motherboard. You're HS may not be seated properly for some reason or another. You don't mention it, but have you checked to make sure the fan on the heatsink is spinning when fired up?
And that's after about 12 seconds of Prime95. Prior to this week it would never get above 83 and 84 on Cores 1 and 2 no matter how much Prime95 I ran.
Yes, the fan is on and is always at 100%. It just cleaned it of dust.
Any other suggestions? I'm really reluctant to removing or checking the heatsink since it involves removing the motherboard and that's very time consuming.
Also, I am overclocked to 3.5GHz @ 1.275V, the same as it's been for nearly a year now. I am using OCZ Freeze and have the XIGMATEK Dark Knight 120mm cooler, which is supposed to be very good but kinda sucks.
Alright I'll check the heatsink and replace the thermal paste if necessary, but I don't have time to do it until tomorrow so I'll post back here later when I'm done.
Thanks for the suggestions!
And honestly, there more I think about it the more I know that something has to be drastically off, since I'm barely overvolted at all, and running with an awesome heatsink and great cooling, yet getting near 100C after just a few seconds of load.
Is there any specified length of time for regular replacements of thermal paste? I hear some people telling me it lasts 3 months and some say it lasts 10 years. I built my PC last June and I haven't changed the paste since then.
Here's what you get for a 14 year old messing with $2,300 worth of technology . . .
I removed the heatsink and replaced all the Thermal paste with my year-old OCZ Freeze (old=bad?). I put it all back together, and started it up. It rebooted itself around 6 times before posting and saying that it reset the BIOS because of a bad overclock. I started it up, and booted into Vista. Just as it was about to reach the login page, the screen went purple at the edges and the PC Shut off. I rebooted, and made it into the BIOS. The current CPU temp said 105C!!!! Yes, 105C. Anyway, I shut it off for a bit, rebooted, and then it said 56C, which is what it had always been before. I tried to boot into Vista, it reset halfway through boot. Now every time I get into the BIOS, it says 85C.
WTF did I do? I'm pretty sure I did the thermal paste and heatsink correctly although obviously I couldn't have . . .