[Raliant]

I just finished my new rig (AMD Athlon 64 X2 Brisbane, nVidia 8600GT (BioStar) 512MB, ASUS M2N-SLI, to name the major parts.) and every so often, about fifteen to twenty minutes into a game, the entire system freezes up. Using speed fan, I've the absolute highest VCore temp at 70C, so I don't think it's an overheating problem (although, it is located right above a super hot North Bridge heatsink...). Could there be anything hardware related causing this? Thanks!

(Oh, I've also tried moving the vid card to the other PCI E x16 slot, but I get a Windows boot error, then repeated "Boot Device Failures.")

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North Bridges shouldn't be "super hot" - warm maybe, but definitely not "super hot".
You might try putting another fan in to pull hot air out to try and help the temperatures a bit under load.

[Neil Jones]

North Bridges shouldn't be "super hot" - warm maybe, but definitely not "super hot".
You might try putting another fan in to pull hot air out to try and help the temperatures a bit under load.

[Raliant]

It seems to be the video card. I've tried using an old PCI card, and it works fine, albeit gives me sucky graphics. I've RMA'd a replacment. If that one doesn't work, I'll get a different card (the reviews were so-so on this one, but the price was good, so I went for it).

As for the north bridge, it wasn't super hot, I just meant it was warm. Compared to everything else in the case, the north bridge is the hottest portion according to SpeedFan, but well within operational temperatures.