Thanks for the response Hyperstrike...I settled on a 1gb Geforce 540m...and I'm happy to report that I can run ultra mode using the card, but only if I don't have any other demanding apps running in the background. If I do, the frame rate turns to garbage. But I had it set all the way to ultra mode otherwise and have had no problems. At least, I not up to this point - I've done a few hours of gaming, but no teams - couple of momentary freezes, but then things pick up again - so far, so good.