424 slot ✓ PCIE 424 card in a Mac Pro early 2008 intel- X4 or X16 PCIE slot?

Chassis, Slot Racks, Mounts, Backplanes: Chassis Rack wo Cards · Reference Number: 85895 · Price: $ 424 slot,Archos Diamond Alpha - Smartphone - dual-SIM - 4G LTE - 64 GB - microSDXC slot - GSM - inches - 1920 x 1080 pixels - LTPS IPS - RAM 4 GB

424 · 425 · 426 · Next >> Download Catalog（2page View) Product TOP Additional Products in this Category Special Shaped Ball Lock Punches · Special 424 slot,CINCINNATI MILACRON 3-424-1808A Chassis, Slot Racks, Mounts, Backplanes: Card Rack Quantity in stock: 1 Add to Cart Ask a Question

424 slot,I currently have a MOTU PCIe 424 card in the top 4X slot on the Mac Does the PCIe 424 card REQUIRE a 4X slot or a 16X slot?