Cable Matters
Cable Matters 2-Pack 8-Pin PCIe to Molex (2X) Power Cable 4 Inches
Bottom line: The Cable Matters 2-Pack 8-Pin PCIe to Molex Power Cable 4 Inches ($9.99 on Amazon as of 2026-10-06): Two cables per pack - covers dual-GPU builds or keeps a spare; main trade-off: 4-inch length forces the adapter to sit close to the card.
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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Two cables per pack - covers dual-GPU builds or keeps a spare
- ✓ Latching female 8-pin PCIe end resists shake-loose in transported cases
- ✓ Dual Molex input lets you split draw across separate PSU rails
- ✓ Named compatibility with EVGA GeForce, Gigabyte, Sapphire, and XFX cards
Cons
- ✗ 4-inch length forces the adapter to sit close to the card
- ✗ Requires two free Molex leads, not one
- ✗ Adds a connector junction between PSU and GPU
- ✗ No wattage or gauge rating published in the listing
Manufacturer description
The Cable Matters 2-Pack 8-Pin PCIe to Molex Power Cable solves a specific retro PC building problem: your older power supply has plenty of spare 4-pin Molex leads but no 8-pin PCIe connector for the graphics card you want to install. Each 4-inch adapter takes two male Molex connections and combines them into a single female 8-pin PCIe plug with a latch, so the connector stays seated inside a case that gets moved or transported. You get two cables in the pack, which covers a dual-card setup or leaves you a spare. Cable Matters designed the dual-Molex input so you can pull from separate rails…
SpecPicks Verdict
SpecPicks scored Cable Matters 2-Pack 8-Pin PCIe to Molex Power Cable 4 Inches using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies & cables category. Cable Matters's power supplies & cables lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for power supplies & cables of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Will this let me run a modern graphics card on an old power supply?
It converts two spare 4-pin Molex leads into one 8-pin PCIe connector, but it does not add capacity. Cable Matters states directly that you should check that your PSU is rated to power the video graphics card before using it.
How many cables come in the pack?
Two. The listing is a 2-pack of the 8-pin PCIe to dual-Molex adapter, each 4 inches long.
Do both Molex connectors have to be plugged in?
Yes - the design draws from two Molex connections, and Cable Matters recommends connecting them to separate rails on different Molex daisy chains rather than two plugs on the same chain.
Will the 8-pin end stay connected inside a case I move around?
The female PCI connector has a latch specifically to prevent accidental disconnections, which is the main reason to pick a latching adapter over a bare one.
Which graphics cards is this known to work with?
Cable Matters lists compatibility with cards such as EVGA GeForce, Gigabyte, Sapphire, and XFX models that use a single 8-pin PCIe power input.
Key Features
- PCI express power cable adapter connects a PCIe video card with an 8 pin connector to a power supply with two spare L4 Molex power connections; Check that your PSU is rated to power the video graphics card
- PSU upgrade saver power cable provides an option for a power supply without a PCIe connection for GPU power; Dual Molex connectors are designed to connect to separate rails on different Molex daisy chains to power a PCIe video graphics card from an older PSU
- 8 pin PCIe to Dual Molex female to male cable provides a convenient solution for video graphics card power with two Molex connectors for GPU cards that require more power
- Sturdy graphics card power cable has male Molex connectors and a female PCI connector with a latch to prevent accidental disconnections
- Video graphics card compatible with graphics cards such as EVGA GeForce, Gigabyte, Sapphire, and XFX
Full Specifications
| Brand | Cable Matters |
|---|---|
| Cable Type | 8 Pin PCIe, Molex Cable |
| Connector Type | 8 Pin Pcie, Molex |
| Special Feature | Direct GPU Power Connection, Sturdy Graphics Card Power Cable with a latch |
| Compatible Devices | Computer |
Ready to buy?
Cable Matters 2-Pack 8-Pin PCIe to Molex (2X) Power Cable 4 Inches is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
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