thinkpadcollection wrote:Should not be a problem.

Cheers, Jason

Thanks, I hope the bios posts with the new fan

AFAIK discrete GPU and integrated-only models of T420 have the exact same motherboard, component positions etc. except GPU part. I want to attach the good heatsink 04W0408 used in discrete models to my T420. Is it possible?

The T520 has a better heat sink than the T420 that can dissipate more heat. Would it work? I think it will (I have read older posts from others who say that it is theoretically possible). But after seeing how HOT mine can get with a 2640m with four threads at full load (about 90C)... I don't think ...

RealBlackStuff wrote:T420 only supports i7-2620M.
It's the T520 that supports i7-2630QM, i7-2720QM and i7-2820QM.

Actually what I mean by support is that would it work if I plugged i7 2630qm? Same socket, same bios.

I am planning to buy one today. Does it support? I will apply Arctic Silver 5 on it.