HPC-7140: 1U Rackmount Server Chassis for MircoATX/ATX Server ...
The Hyte Y60 case has 7 half-height expansion slots running by the motherboard, and they include a PCIe riser that lets you mount things like a GPU vertically on 3 full-height expansion slots.
expansion slot | meaning of expansion slot in Longman Dictionary ...
No, it is not possible to upgrade the expansion slots on a computer motherboard. The types of slots available are determined by the motherboard itself, and upgrading the slots would require replacing the entire motherboard.
PowerColor Readies Single-Slot, 4-way CrossFireX Ready HD 6850 ...
If you buy a PCIe 4.0 expansion card but only have PCIe 3.0 slots on your motherboard. You can still use PCIe 4.0 expansion cards with PCIe 3.0 motherboards, thanks to PCIe 4.0’s backward compatibility.