Hey all,
I'd like to quick report about my Xbox 360 (New Zealand Launch Console, so around April Last Year, Hitachi Drive) so people can read my experience with the box, and with my breakage/repair.
My console was used daily (4 Hours+) for about 3 Months before I decided to crack it open and rewrite the drive firmware. At the same time I replaced the thermal paste with arctic silver. The 360 then functioned perfectly for another 5 Months before I downloaded the January 6 update. After about 2 Days, I was playing topspin, and the box froze. 3 Red lights.
Now I read anything and everything I could find on the net about this problem (This thread being the best resource!) I've seen the toothpick trick, the towel trick, and the heatgun trick. I decided I'd go for the least lethal first.
I then opened it up, disconnected the fans, and let it melt itself for a bit (aka, the towel trick, just without the towel). It started back up, but was inconstant and wasn't stable.
Tried the toothpicks, no change, so biffed the toothpicks.
I then added a 12v fan header to the motherboard and added an 80mm fan to the top of the GPU Heatsink, sucking the air off it. It got a little more stable, but wasn't really functional.
I then pulled the heatsinks off again, and came to the conclusion the clamps provided are rubbish. The Clamping force is shit.
I then heatgunned the GPU Only. Not very long, a couple of minutes, While it was hot (But after I had heatgunned it), I used a piece of wood and put a bit of pressure on the GPU Core, pushing it down.
I then removed the clamp mounts off the heatsinks and replaced them with nuts and bolts that go through the heatsink and motherboard with Washers on each end (To keep the pressure even). You will need to bend the fins on the GPU Heatsink.
You need to make sure the bolts are tightened properly, and evenly, you wouldnt want to overtighten one and crack a core!
I then put the 80mm Fan back onto the GPU Heatsink, Connected the 360 back up, and it's been running great since!
While it doesn't fit in the case anymore, mainly due to the DVD drive having to be moved, I'm not complaining!
So for those of us who are having issues, I think alot of it can be down to crappy heatsink clamp design as well.