single slot half height gpu: Dell Precision Tower 7920 Workstation Gold 6138. Mac Pro: Should You Buy? Advice, Features, Price - MacRumors. Dell OptiPlex 3040 Mini - schematics for add missing parts and ... .
Expansion
Slots, All
slots PCIe Gen 3. (6) PCIe full height/full length slots, (1) PCIe full height/half length
slot, (1) PCIe low profile/full length slot.
Half-height MPX Module fits in an MPX bay and enables
PCIe slot 2 for additional expansion.
1 SD 4.0
card slot (optional) 1 half-height Gen 4
PCIe x16 slot 1 half-height Gen 3 PCIe x4
slot 1 M.2 2230 slot for WiFi and Bluetooth card 3 M.2 2230/2280 ...