So this was the RAM I got:
http://store.yahoo.com/pcmemory-stores/51pc33ddrsta.html

So that's the stuff. There's a sticker on the sticks that say tey have a warranty, so I suppose I can send them back. Who knows if they'll just replace it with the same or actually give me my money back.

Oh, I should point out that the RAM isn't even warm, so it's definitely not overheating.
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Matt