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Originally Posted by kevineugenius  I had a guy interested in the machine so I didn't do anything to the grease. It was all still in nice little squares and I wanted him to know I hadn't dinked around with it. He did say it overheated on him about 20 minutes after I left... lol.
I had it on the fanless Thermaltake cooling pad when I ran it, so maybe that pad actually works more than I thought it did. On my software testing, I didn't notice any difference in reported temps, but apparently there was. Either the software reports it wrong, or it is RAM chips overheating and not the CPU or GPU themselves... At any rate, the TT pad is a good investment for $35, no battery drain, no noise, foldable so it fits in more places than a standard cooling pad does.
The only REAL solution I can think of... go on ebay and buy an MXM II Geforce 6600 and a 1.66 ghz processor for the lowest heat generation possible. I have found Arctic Silver Ceramique to be the best compound, I don't like OCZ though some people swear by it. Its too sticky, can't get your heatsink back off after application.
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Once you break the seal on a heatpad, you need to install a new one, so if you took the heatsinks off, then reinstalled them without new thermal grease or new heatpads, that's likely what is causing your heat issues. The 5750 can run warm, but it shouldn't overheat.
Heatpads and thermal grease have chemicals in them that keep them sticky until they go through a few heat cycles. Once they come to temperature though, these chemicals set between the chip and heatsink. If that "set" is disturbed, you seriously diminish the heat transfer and it will cause increased temperatures.
If you still have the laptop, I'd clean off the heatpads and either install new ones, or use AS5. It will work better than nothing, or the compromised heatpads you have left...
