I need to upgrade my Dell OptiPlex 790 Mini Tower with a new motherboard that doesn't have 35w limit on PCI-E so I can use a higher end graphics card. The problem is I don't know if my case is standard so I can drop in any ATX motherboard. I would greatly appreciate if anyone knows! I plan to keep my CPU (Core i7 2600) so I need a LGA 1155 socket MB. Probably would need new fan too as the OEM one may not fit the new MB... Again not sure.
I also would also upgrade my PSU to the Silverstone 600w Strider. My planned GPU purchase is a NVIDIA GTX 650Ti.