Dell Optiplex 7040

Case is smaller than most for a mini tower. You can squeeze (2) 3.5" HDDs under the slim DVDRW if you are not using sleds. The case is really meant for (1) Slim DVDRW, (1) 3.5" HDD, (2) 2.5" HDD's, (1) M.2.

Great specs for a prebuilt system. M.2 ssd support integrated onto motherboard. + (4) SATA ports = 5 Drives total. I was able to run video cards that require 1 PCIE 6 Pin power cable with adapter. Radeon 7790 / 260X works just fine. Supports up to 64GB...

Dell's proprietary power supply form factory and connectors. SATA drives are powered through the motherboard. Non standard motherboard power supply connector prevents power supply upgrades.