PCIe Riser Cable to use the PCIe slot under the GPU?

See Table 3 on Page 11 of the HP Z840 Workstation Technical White Paper In no scenario, do they recommend installing a GPU or Graphics Card in

That said, partial contact could, in turn, fry your GPU and mobo If you're confident in the secure placement of your card, it is fine, but if

does it matter which pcie x16 slot i use The natural layout I used when I put the machine together initially was the Radeon graphics card in the first PCIe x16 slot and the Intel card

does it matter how much you bet on a slot machine Your Motherboard provides 2-16X PCIE slots, which would be ideal for high-performance graphics card teaming via Crossfire in the case of this