Extremely Fatal Overheating Problem

Hey DevHardware. First up, specs:
Intel Core 2 Quad Q6600 2.4Ghz
Asus P5N-D motherboard
OCZ 667FSB Ram
Thermaltake 430 watt Power Supply
XFX 8800 GT

Speedfan Pic
(well I can't post URLS but
Core 0: 98C
Core 1: 99C
Core 2: 100C
Core 3: 98C

Same happens in CoreTemps.

It's been at these temperatures for a month, 120C when playing Half-Life 2, and it shuts down within 30 minutes in Half-Life 2. It shuts down in 3 - 5 hours on Idle. The problem is a broken pin, a few months ago when I bought the computer, I let my brother put it together. I come into my room, he's trying to put the heat sink on pushing as hard as he can. Problem being he forgot to put on the spacers.
Anyway, I need advice. Should I sell the computer and get a build with AMD and ATI? I was thinking of
AMD Phenom X3 720
ATI Sapphire 4870 HD
G.Skill 1066 2x2GB Ram
MSI K9A2 Platinum Motherboard
Antec EA650 650 watt PSU.
And some Arctic 5 thermal paste.
But the question(s) are
1. should I sell it? I know I should sell the whole build as just a processor won't get any looksies.
2. What build would you recommend for a $800 ish build (and thats after selling it)

I personally would stick with what you got and just buy a decent after market heatsink. No need to upgrade your CPU. If anything just add memory and a newer video card(Although that PSU isn't going to cut it with a beefy VC such as 4870x2)

btw, you would be technically downgrading if you went with that AMD CPU

well even with a stock heatsink on a Q6600 in any operating environment shouldnt be hitting temperatures that high, so it sounds to me like the broken pin on your heatsink is preventing the heatsink from making proper contact with the processor.

But I am with Brian on this, dont bother upgrading anything in your PC, just purchase a decent after market heatsink, and install it properly this time. There is no reason to sell the pc as it is still considered pretty modern, though you could stand to upgrade to some DDR2 800 instead of 667...but thats only because 2gb of the stuff is like $20 these days A better video card is always a good idea, but unless you are running a pretty high resolution I dont see an 8800 GT holding you back in any modern games.

Sounds like your running in a case with no fans!!

I doubt that - so take Stang's and Brian's advice and get an aftermaket heatsink and hope it cools down. Apply some Arctic Silver 5 or OCZ freeze in between the heatsink and the CPU in the interim, if another, better, aftermarket heatsink fan isn't an option!!

only hitting high 60s at 3.6ghz its got to be your heatsink try re-seating it.