StarTech PEX1394B3LP Low Profile PCIe FireWire 800 Expansion Card

Overview

The StarTech PEX1394B3LP is a low-profile PCI Express FireWire expansion card designed to add IEEE 1394b and IEEE 1394a connectivity to small form factor and slim desktop systems that shipped without native FireWire ports. At 3.3 × 2.3 × 0.8 inches, it fits inside compact enclosures where a full-height card simply won't mount — making it the correct pick when you need FireWire on an SFF workstation running audio/video production tools, legacy DV cameras, or external storage arrays that predate USB 3.0 dominance.

The card is built around the Texas Instruments xIO2213B chipset, a well-regarded controller that provides stable, low-latency FireWire throughput rather than relying on software emulation. If you have had reliability problems with generic FireWire cards under sustained data transfers, the TI chipset is the reason integrators specify this one instead.

Key Features

• 2× FireWire 800 (9-pin, IEEE 1394b) external ports: Each port supports up to 800 Mbps, so you can daisy-chain high-bandwidth DV decks, audio interfaces, or hard drives and still have headroom — unlike the 400 Mbps ceiling on legacy FireWire 400 devices. Both ports are independent, so saturating one does not throttle the other to the same degree as shared-bandwidth implementations.
• 1× FireWire 400 (6-pin, IEEE 1394a) external port: Keeps older 400 Mbps peripherals — early DV camcorders, scanners, and legacy disk enclosures — fully operational without an adapter. The 6-pin connector also carries bus power, so self-powered devices that draw from the bus can remain operational without a separate brick.
• Texas Instruments xIO2213B chipset: TI's silicon is consistently the integrator-preferred choice for FireWire because it handles isochronous transfers (required for real-time DV capture) more reliably than budget controllers. This matters most in production workflows where dropped frames cost retakes, not just inconvenience.
• PCI Express 1.1 interface: PCIe 1.1 slots are found on nearly every desktop and small form factor board produced since 2005. The card draws its bandwidth from the PCIe bus rather than competing with USB or PCI legacy bandwidth — practical on any system where older PCI slots are already occupied or absent entirely.
• Low-profile form factor (3.3 × 2.3 in): Fits any chassis with a low-profile PCIe slot, including most slim desktops, mini-towers with LP bays, and industrial panel PCs. Full-height bracket availability is worth confirming for your specific chassis before ordering.
• LP4 (4-pin Molex) internal power connector: The onboard LP4 connector allows the card to pull supplemental power directly from the PSU rather than leaning entirely on PCIe slot power. This is especially relevant when driving bus-powered FireWire devices that demand consistent voltage — you get cleaner, more stable device enumeration under load.
• Operating temperature 0°C to 70°C: Within the standard commercial grade envelope. Fine for conditioned office and studio environments; not rated for unventilated industrial enclosures running above ambient.
• Lifetime warranty: StarTech's lifetime product warranty removes the replacement cost equation from the decision — relevant when specifying hardware for editing suites or infrastructure that will outlast the original system build.

Integration and Compatibility

The PEX1394B3LP installs into any available ×1, ×4, ×8, or ×16 PCIe slot (PCIe is electrically and physically backward-compatible at higher lane counts). The low-profile bracket is pre-installed; confirm your chassis has a standard low-profile bay. The LP4 internal power connector requires an available 4-pin Molex lead from your power supply — if your PSU ships with only SATA power connectors, a Molex adapter will be needed.

FireWire 800 is backward-compatible with FireWire 400 devices when using a 9-pin to 6-pin or 9-pin to 4-pin cable — those cables are not typically included and should be sourced separately if your peripheral is 400 Mbps. The dedicated FireWire 400 port handles 6-pin devices natively with no adapter required.

Driver support spans Windows and macOS environments where native FireWire support is present in the OS. On modern Windows 10/11 systems, verify that your OS has the legacy 1394 bus driver enabled, as Microsoft deprecated the legacy FireWire stack in favor of a newer driver model beginning with Windows 7 SP1 — most professional A/V applications handle this transparently, but it is worth confirming before deployment.

Frequently Asked Questions

Q: Does the PEX1394B3LP require a full-height slot, or does it fit slim desktop systems?

A: The PEX1394B3LP ships with a low-profile bracket installed and measures 3.3 × 2.3 inches — specifically designed for small form factor and slim desktop systems with low-profile PCIe bays. It will not physically fit a full-height bay as shipped without a bracket swap.

Q: Do I need to connect the LP4 power cable, or is PCIe slot power sufficient?

A: The LP4 (4-pin Molex) internal connector provides supplemental power. For reliable operation of bus-powered FireWire devices — particularly those drawing current from the 6-pin FireWire 400 port — connecting the LP4 lead is recommended. Skipping it may cause intermittent device enumeration under load.

Q: Can I connect a FireWire 400 device to the FireWire 800 ports on the PEX1394B3LP?

A: Yes. FireWire 800 (IEEE 1394b) is backward-compatible with FireWire 400 (IEEE 1394a) devices using a 9-pin to 6-pin or 9-pin to 4-pin adapter cable. The device will negotiate down to 400 Mbps. Alternatively, the dedicated 6-pin FireWire 400 port on the card handles legacy devices natively at full 400 Mbps without any adapter.

Q: What is the warranty on the PEX1394B3LP?

A: StarTech covers the PEX1394B3LP with a lifetime warranty.

Q: Is the PEX1394B3LP compatible with Windows 10 and Windows 11?

A: The card uses the Texas Instruments xIO2213B chipset, which is broadly compatible with Windows 10 and 11. However, Microsoft transitioned FireWire driver support beginning with Windows 7 SP1. Most professional A/V applications manage this transparently, but you should confirm that the legacy 1394 OHCI driver is enabled in Device Manager and that your specific software supports the current Microsoft FireWire stack before deploying.

Q: What PCIe slot sizes does the PEX1394B3LP support?

A: The card uses a PCIe 1.1 interface and physically installs into ×1 slots. It is also electrically compatible with ×4, ×8, and ×16 slots due to PCIe backward compatibility — the card will operate at ×1 bandwidth regardless of the physical slot size.

Eden Phillips

The PEX1394B3LP comes up frequently when a studio or production environment is migrating to a newer SFF workstation and discovers the new board has no native FireWire ports — a situation that has become increasingly common as Intel and AMD platform designers dropped 1394 from chipsets entirely. The Texas Instruments xIO2213B chipset is the spec I look at first on any FireWire card recommendation: TI's isochronous transfer handling is materially better than off-brand controllers, and for DV capture at 400–800 Mbps you cannot afford dropped frames from a budget ASIC.

Technical Highlights:

• 800 Mbps FireWire 800 ports: Two independent 9-pin IEEE 1394b ports each support up to 800 Mbps — double the bandwidth ceiling of the FireWire 400 generation. For daisy-chained RAID enclosures or dual DV deck setups, this headroom prevents the bus from becoming the bottleneck.
• Low-profile PCIe form factor (3.3 × 2.3 in): At these dimensions, the card installs into slim desktops and mini-ITX enclosures that a standard half-height card would simply not fit. The PCIe 1.1 interface also means near-universal slot compatibility on boards going back to 2005.
• LP4 supplemental power: The onboard 4-pin Molex connector lets the card pull power from the PSU rail rather than stressing the PCIe slot's 25W budget — particularly important when you have bus-powered peripherals drawing current through the 6-pin FireWire 400 port simultaneously with two 800 Mbps devices.

Deployment Considerations:

• Verify the LP4 power lead is connected before first boot — omitting it with bus-powered peripherals attached is the most common cause of intermittent enumeration failures reported in the field.
• On Windows 10/11, the legacy 1394 OHCI driver must be active; if Device Manager shows the controller under a generic or disabled entry, enable the legacy driver manually before expecting your A/V application to recognize attached devices.

For a post-production suite or broadcast facility integrating a compact workstation with legacy DV decks, tape digitization hardware, or older FireWire audio interfaces, the PEX1394B3LP is the correct card — TI chipset, lifetime coverage, and a form factor that fits where competitors' cards don't.