Planeshift uses very little bandwith, so that\'s no the problem. Planeshift does use pretty much RAM, so you could put some more in your computer. But still, the lag you\'re experiencing is pretty extreme. You could try downloading and installing the latest drivers for your videocard, if you have the wrong drivers/they\'re messed up/standard drivers/outdated, then Planeshift is very likely to lag. A friend of mine had it too, took him ages to make one step. Downloaded and installed the latest NVidia drivers and everything worked fine again.
Try it, and good luck!
By the way, you say you think you fixed, then what did you do? And if PS won\'t load now, then how do you know it\'s fixed?
And isn\'t VRAM just some kind of swap file? A kind of RAM but then on your hard drive? Well, if he has 32 gigabyte left, that shouldn\'t be a problem.