ohh!! this is very great point! Thanks, guys. I will check tonight dust and heat

Ok, guys/gals I have a question. Still new to all this mining stuff, so...  I've been mining litecoins for a while now
I have radeon 7970 and 6770 and bunch of CPU miners (around 30khash/s)
Not sure what happened ddos or what, but miners wouldn't connect to pool-x or ozco.in. When i finally was able to connect, every miner would have like 95% off stale shares
after while and working with cgminer settings, (cgminer --scrypt --worksize 256 --shaders 1792  --lookup-gap 2 -g 1 --thread-concurrency 8000 --intensity 13 -o http://pool:9332 -u xxxx.x -p xxx ) I got stale around 10% but speed dropped significantly. Before I had 530khash/sec on my 7970 now I have like 490 and different settings wont bring it up (just makes more stale shares) and while my speed overall is dropped, suddenly I see pool-x users get crazy hashrates, like 12700khash and ozco.in is even more. So... two questions:
Does anybody know what do they use? Asics or something?  and what settings could I use to improve my speed? I've tried various of different options for cgminer, but only get more stale.
Thanks

Damn, you were right, they do overheat... 10 minutes is all they last when I start LTC mining. Intel CPUs keep mining and mining and mining... No issues. I knew that AMD processors run hotter therefore my heat sinks and cooling aren't pathetic. Heck, I even put window box fan next to opened case, when I had excessive heat problems, that usually solves, but not this time... Yet ATI video cards do BTC mining just fine without overheating. So, what should I do? get water cooling?

Hey, guys (gals too), I've been reading this forum for a while, now I decided to register and ask a question while I am at it...
So, while I'm doing GPU bitcoin mining, I figured I should utilize my CPUs as well. I have 3 computers with Intel CPUs. Xeon X3430 (windows 2003 x64), i7 (windows XP x64), quadcore Intel (freebsd) these computers mine just fine and I get about 27kHash/sec. Now, I also have 3 AMD machines Athlon II x4 (XP, win7, freebsd all x64) and this is where it gets interesting. After about 5-7 minutes of mining and reaching speeds about 23-24kHash/sec they shutdown. No problems with them otherwise until I start miner... same software, same settings on all of them. I turn them back on and they stay on fine, and no bios warning messages that the computer was shutdown due to thermal event or something like that. And I start miner... and they off again. So... AMD CPUs are no good for mining or something?