Ok.. could you tell me which driver your using at the moment? Also have you tried to increase the fan speed on the cards? If you haven't and don't know how there are a number of ways. 1. Download something called 'Ntune', which is a utility by Nvidia and has the option to increase fan speed within it. Get it here: NVIDIA nTune

2. Rivatuner. This is a great utility for overclocking and other graphical tweaks. It is also capable of controlling the fans with settings enabling you to set up a high and low limit. Get it here: RivaTuner v2.08 download from Guru3D.com (I use Rivatuner and can vouch that it's a great little utility)

3. I just thought of another option although this is perhaps a little more drastic. The connection lead on the graphics card fan has several different coloured wires all intertwined.. If you pull the lead from out of it's socket you can then use a sowing needle to detach the blue wire from the connector block. You can then use tape to make it safe against the main body of wires. What this will do is make the fan run at 100% all the time and I've actually done it to my 8800GTS. It does make for a little extra noise but I don't have to worry about the fan not cooling my card.. Anyhow it's your choice.

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