Gen4 bifurcation with a future-Gen5 path, on the same 6 cm ribbon board as the 523P. Narrower board compatibility than the rest of the line. Read the clock-setting note before ordering.
| Riser slots | Two PCIe x16 right-angled female (x8, x8) |
|---|---|
| Generation | PCIe Gen4, future Gen5 |
| Ribbon | 6 cm |
| Aux power | Front PEG 6-pin · 75 W |