Quote: Original post by mumpo
I would recommend a Radeon HD 4670. They are several times more powerful than your 6800 GT, have an up-to-date feature set, and don't use much power at all; they get all they need straight from the PCI-E slot. They are also inexpensive and not effected by the manufacturing flaws present in many recent NVIDIA cards which have been causing high failure rates.
Yeah I'd recommend a Radeon 4850 at least but then again you'd be cutting it close with your powersupply.
If you want to stick with Nvidia a 8800GTS was the best upgrade for a while there.