hackajar wrote:That Dell chassis only supports 1 slot PCIe cards, the GTX series will not fit.
The chassis supports M20xx cards which are double-width.
It easy to verify: a 19" (48.26 cm) rackable chassis has a typical internal width of ~43cm which is enough to hold the 10 double-width cards (4cm) in the front, plus 6 in the back.
The only thing that might be a pb is the position of the power connectors, and the length of the card. For example I doubt an AMD HD 5970 would fit.