Originally Posted by prefect42
My experience with x86_64 large memory (8Gb) dual dual-core machines is that SLI is nowhere near as stable as running with a single card. Also take a serious look at Quadros. The performance of the Quadro 4500 compared to a 7800GTX can be *astounding* in some applications.
Taking prefect42's advice, I found a link to a PDF document (dated I believe in 2003, from what I see at the bottom of each page in the document) that gives some technical details comparing the GeForce GPUs versus the Quadro GPUs:
Technical Brief: Quadro vs. GeForce GPUs
It also provides a performance comparision (Probably dated?).