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Green printed circuit board with gold edge connector and silver 74-pin MCIO socket, full-height bracket

Innocard

Innocard EP8174 PCIe x8 Gen 5 ReDriver to MCIO 74P AIC

SKU CH-24JA-AWDN4

PCIe x8 Gen 5 ReDriver card with MCIO 74P connector extends 32 GT/s signals up to 22 dB at 16 GHz

  • Changer TypePCIe Gen5
  • Extends PCIe 5.0 signals to 32 GT/s with integrated ReDriver controller
  • CTLE boost reaches 22 dB at 16 GHz for signal integrity
  • Eight lanes bifurcate into two x4 links for flexible topology
  • On-board 100 MHz clock buffer and PERST# gate support longer cable runs
  • SMBus switch, I/O expander and WAKE# buffer enable out-of-band management

PCIe x8 Gen 5 ReDriver card

The Innocard EP8174 is an add-in card that converts an MCIO 74P connector to a PCIe x8 Gen 5 interface with a built-in ReDriver. It targets system integrators and OEMs who need to extend high-speed PCIe 5.0 signals across longer PCB traces or cables in servers and workstations. The card includes integrated clock buffering and SMBus management for remote port control.

Signal extension upgrade

This adapter replaces direct MCIO cabling or passive interposers when signal integrity at 32 GT/s over eight lanes degrades over distance. The jump is worth it when the platform requires CTLE boost up to 22 dB at 16 GHz, programmable linear equalization, and PERST or WAKE signal buffering to maintain link stability across extended routing.

Eight-lane headroom

The card comfortably handles PCIe 5.0 x8 or bifurcated x4/x4 topologies with 100 MHz clock distribution and 3.3 V auxiliary power protection. It runs out when the platform demands more than eight lanes, a different connector pitch, or active cooling not provided by the CEM slot power budget.

Highlights

  • Extends PCIe 5.0 signals to 32 GT/s with integrated ReDriver controller
  • CTLE boost reaches 22 dB at 16 GHz for signal integrity
  • Eight lanes bifurcate into two x4 links for flexible topology
  • On-board 100 MHz clock buffer and PERST# gate support longer cable runs
  • SMBus switch, I/O expander and WAKE# buffer enable out-of-band management

Specifications

Changer TypePCIe Gen5

Questions about this item

Does the EP8174 fit a standard PCIe x8 slot?

Yes, the card plugs into a PCIe CEM x8 slot and draws 3.3 V and auxiliary 3.3 V through that connector.

What is the step installers most often miss when fitting the EP8174?

Connecting the MCIO 74P cable before the ReDriver and clock buffer are powered — the 100 MHz buffer at address 0x6C and the PERST# gate need stable 3.3 V first.

Which on-board components of the EP8174 may need replacement after extended use?

The ReDriver controller, the SMBus switch at 0x70, the I/O expander at 0x20 and the clock buffer at 0x6C are the active ICs that can age.

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