This article covers StarTech.com 2x ペリフェラル.

Overview

The StarTech.com LP4PCIEXADAP is a short 15cm adapter cable that converts two standard peripheral 4-pin (Molex) power connectors into a single PCI Express 6-pin graphics card power connector. It serves as a practical solution when your power supply lacks dedicated PCIe 6-pin headers but has spare peripheral connectors. Backed by StarTech.com's lifetime warranty, this cable has been a reliable staple for PC builders dealing with older or budget power supply units.

Connectivity & Compatibility

Input side: Two standard 4-pin peripheral (Molex) male connectors. Both must be connected to free peripheral outputs on your PSU for proper power delivery. Output side: One PCI Express 6-pin female connector, compatible with most graphics cards that require a 6-pin auxiliary power input. Supported power limit: Approximately 96W combined (12V × ~4A per rail × 2 rails). This is well within the safe range for cards rated up to ~120W TDP, but not suitable for high-power GPUs exceeding 150W. Physical fit: The 15cm cable length is ideal for tight spaces inside Mini-ITX or small-form-factor cases. In larger mid-tower or full-tower cases, you may need a longer extension cable to reach the graphics card cleanly. * Important: Always verify your PSU's peripheral rail current rating (often printed on the PSU label) before relying on this adapter for high-load scenarios.

Product Info

Availability: Widely available on and other online retailers for around ¥937 (tax included). Exact launch date is not publicly listed, but this model has been in continuous production for many years. Warranty: StarTech.com's lifetime warranty — a strong guarantee that covers manufacturing defects indefinitely. Accessories: Adapter cable only, sold in a simple poly bag or small box. No additional screws, ties, or instruction manual are included (installation is straightforward). Market position: Entry-level to mid-range accessory. It sits in the 'gap filler' tier — a practical but safety-critical solution for extending the life of older PSUs or enabling a budget graphics card upgrade. It is not designed for premium or high-power builds.

Best Use Cases

Reviving an older power supply: If you have a 5–10-year-old PSU that only has peripheral 4-pin connectors but want to add a low-power dedicated GPU (e.g., GTX 1650, RX 6400, or a secondary card for encoding), this adapter offers a cost-effective way to do so. However, avoid using it with gaming cards that exceed 120W — the risk of overheating the peripheral connectors is real. Spare for troubleshooting: Having one of these cables in your toolkit allows you to quickly test a graphics card in a secondary system that lacks PCIe power. It's especially handy for bench-testing motherboards without a full PSU upgrade. * Compact cable management: The 15cm length reduces clutter and improves airflow in tight spaces. But note that in full-tower cases with long graphics cards (e.g., 300mm+), the short cable may not reach the GPU's power socket without an extension — plan your layout accordingly.

Things to Consider

Safety first: Peripheral 4-pin connectors were not designed for continuous high-current GPU loads. Always check the total TDP of your graphics card and ensure it doesn't exceed ~120W. Drawing too much current can cause the connectors to overheat, melt the insulation, and in worst-case scenarios lead to fire. This is not a theoretical risk — it has been documented in overclocked/high-load builds. Physical connector mismatch: Modern graphics cards increasingly require 8-pin or 12VHPWR connectors. The LP4PCIEXADAP only outputs 6-pin, so for an 8-pin card you'd need a separate 6-pin-to-8-pin adapter — which further compounds the current limitation and should be avoided unless you're certain the PSU rail can handle it. * Limited necessity: Most PSUs sold in the last 5–6 years already include at least one 6-pin PCIe connector. This cable is relevant only if your PSU lacks any 6-pin/8-pin headers. Check your PSU's connector layout before purchasing — you might not need it at all.

Product Disclosure (Amazon)

  • Manufacturer: StarTech.com(スターテック)
  • Seller: ナノズ(株)評価数２３万件以上の実績（土日祝休業）
  • Fulfilled by: ナノズ(株)評価数２３万件以上の実績（土日祝休業）
  • ASIN: B0007RXDDM
  • Note: This article covers a manufacturer-made product based on Amazon listing details.