Dell PowerEdge R640 — Full Technical Specifications

The trade this model makes shows up in two lines: slots are few and accelerator support is narrow, while everything else matches its taller sibling. Read those two first and decide whether the server will ever be asked to do more than it was bought for, because in this chassis the answer is close to fixed. The bay row includes a rear pair that is easy to miss and is often what makes a boot-and-data split possible without surrendering a front bay. Supplies are listed across a wide range; in a dense cabinet the real limit is what you can actually draw per rack, not the figure on the sheet.