Only PCIe 3.0. No 4.0 support. If you put an RTX 3060 or newer in the x16 slot, you lose ~3-5% performance.
The HP 87D6 SMVB is an excellent boat anchor inside a complete HP EliteDesk system. As a standalone motherboard for a custom build, it's a nightmare of proprietary parts. Only buy it if you already have the matching HP case, PSU, and front panel assembly. Otherwise, spend $50 more on a standard B365 motherboard and save your sanity. hp 87d6 smvb motherboard
First, a critical clarification: is not a model number. It stands for "System Motherboard Value Basic" (HP’s internal coding for a standard, non-Z-series board). The true model is the HP 87D6 (often labeled "E503519-001" or similar on the sticker). Only PCIe 3
