I've read in a few places that upgrading the RAM in a T420 (or any Sandy Bridge laptop) can provide a speed boost for the Intel HD3000 IGP. Specifically, faster RAM will show a noticeable improvement. Can anyone here sound off on this? My Google-Fu hasn't come up with much on the subject, so I figured I'd ask around. I'd like to upgrade the RAM in my T420 to 8GB eventually.