What Can You Put in PCIe Slots? 2026 Complete List

PCIe slots on motherboards accept a wide range of cards in 2026, from GPUs to storage. This list guide details compatible devices by slot version (3.0-5.0), sizes (x1 to x16), and use cases for builders.

Backward compatible, PCIe 5.0 slots run older cards at reduced speeds. Unlock your mobo's potential with these options.

Graphics Cards (GPUs)

Primary PCIe x16 use.

  • NVIDIA RTX 50-series
  • AMD RX 8000 GPUs
  • Integrated eGPU enclosures

Storage Expansion Cards

Boost SSD capacity.

  • NVMe RAID controllers
  • M.2 to PCIe adapters
  • U.2 enterprise drives

Networking and Sound Cards

Upgrade connectivity.

  • 10/25GbE NICs
  • WiFi 7 cards
  • USB4/Thunderbolt add-ins
  • Hi-Fi DACs

Specialty PCIe Devices

Niche 2026 tech.

  • AI accelerators (NPU)
  • Capture cards 8K
  • Mining risers
  • FPGA programmers

PCIe Slot Compatibility Tips

Key rules.

  • x16 slot fits all smaller
  • Power connectors needed
  • Bifurcation for multi-GPU
  • Check lane allocation

Avoid These in PCIe Slots

Common mistakes.

  • SATA drives directly
  • Proprietary laptop cards
  • Overpowered without PSU upgrade

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