It is an internal PC power adapter cable that converts two 4-pin Molex power connectors from a compatible desktop PSU into one 6-pin PCIe graphics card power connector.

It is best used for older desktop PCs where the power supply has spare Molex connectors but the graphics card needs one 6-pin PCIe power connector. It should only be used when the PSU and GPU power requirements are suitable.

The model number and MPN are 88RB-527. Your Memox listing also shows SKU 332271 and UPC 5055781202612.

This adapter has two 4-pin Molex power connectors on one side and one 6-pin PCIe graphics card power connector on the other side.

The cable length is listed as 20cm. This short length is suitable for internal PC use where the PSU Molex connectors are already close to the graphics card.

The cable is listed as 18AWG. Wire gauge matters because GPU power cables carry current, so the cable should only be used within sensible power limits and with suitable components.

Molex usually refers to the older 4-pin peripheral power connector found on many desktop power supplies. It was commonly used for older hard drives, optical drives, fans and accessories.

6-pin PCIe is a graphics card auxiliary power connector used by some GPUs that need more power than the motherboard PCIe slot alone can provide.

No. This is for PCIe graphics card power, not CPU/EPS motherboard power. Do not force the connector into any socket it is not designed for.

Some 6-pin connectors can look similar but are keyed differently. The listing notes that this connector has rounded corners on pin 5, helping identify it as the PCIe-style connector shown for this adapter.

Using two Molex connectors helps spread the load across two connectors instead of pulling all current from a single Molex plug. Both Molex connectors should be connected when using the adapter.

No. This type of adapter is designed to use both Molex connectors. Using only one can overload the connector, cause instability or increase heat risk.

Where possible, yes. Using Molex connectors from separate PSU cable runs can reduce load on one cable chain. Avoid placing heavy GPU load through one old or weak Molex cable chain.

No. This adapter only changes the connector type. It does not increase the wattage, quality, safety margin or 12V output capability of your power supply.

No. It is not suitable for all graphics cards. It should only be used with a compatible lower-power GPU that requires one 6-pin PCIe connector and when the PSU has enough 12V capacity.

A standard 6-pin PCIe auxiliary power connector is generally designed for up to 75W. The full graphics card power draw also depends on the PCIe slot and the GPU design.

No. This adapter provides a 6-pin PCIe connector, not an 8-pin or 6+2-pin PCIe connector. Do not use it for a GPU that requires an 8-pin connector unless the GPU manufacturer specifically supports a 6-pin connection.

It is generally not suitable for modern high-power RTX graphics cards. Most newer gaming GPUs require native PCIe 8-pin, 12VHPWR or 12V-2x6 power from a suitable modern PSU.

No. This cable is not for 12VHPWR, 12+4-pin or 12V-2x6 graphics cards. Those GPUs require the correct native cable or approved adapter from a suitable PSU.

It may be suitable for some older or lower-power GPUs that require one 6-pin PCIe connector, provided the PSU has enough wattage and 12V output. Always check the GPU manufacturer’s power requirements first.

No. It is not recommended for mining rigs or continuous high-load GPU use. For sustained GPU workloads, use a proper PSU with native PCIe power connectors and enough 12V capacity.

It is not recommended for PCIe risers or mining-style riser power. Use power cabling recommended by the riser, GPU and PSU manufacturer, and avoid overloading Molex chains.

Molex adapters are often preferred over SATA adapters for older PC power conversion, but neither is ideal for high-power GPUs. A PSU with native PCIe GPU cables is the safest and best solution.

If your graphics card is modern, high-power, expensive or used for gaming under load, replacing the PSU with a model that has native PCIe connectors is usually the better and safer choice.

Check your GPU power requirement, PSU wattage, PSU 12V rail rating, PSU age, Molex connector condition, cable routing, case airflow and whether your graphics card requires exactly one 6-pin PCIe connector.

Any power adapter can cause problems if used with the wrong GPU, weak PSU, damaged connector or excessive load. If your GPU needs more power than this adapter can safely support, use a proper PSU instead.

Yes, if it is overloaded, connected loosely, used with poor-quality PSU wiring, used on one weak Molex chain or connected to a GPU drawing too much power. Stop using it if the cable or connectors become hot.

Many warnings are because old PSUs may have weak 12V output, poor-quality connectors, thin wiring or no native GPU power cable. An adapter cannot fix an unsuitable PSU.

It may be used for careful temporary testing with a suitable low-power 6-pin GPU and capable PSU, but it should not be used to push an old PSU beyond its limits.

For serious or long-term gaming, a PSU with native PCIe graphics power connectors is strongly preferred. This adapter is better suited to low-power, older or light-use systems where compatibility has been checked.

Turn off the PC, unplug the mains power, connect both Molex connectors from the PSU, connect the 6-pin PCIe plug firmly into the graphics card, check the latch and make sure no cable is loose before powering on.

No. Never force a power connector. If the connector does not fit easily, stop and check whether the GPU needs a different cable, such as 8-pin PCIe, 6+2-pin PCIe, EPS or 12VHPWR.

No. It is an internal PC power cable designed for use inside a desktop computer case. It is not an external power cable and should not be used outside a PC build.

No. This is an internal desktop PC power adapter. It is not suitable for laptops, external graphics docks or laptop power supplies.

Only if you are connecting to the PSU’s existing Molex peripheral cable outputs. Do not plug this adapter directly into the modular PSU socket, and do not mix modular PSU cables from other brands or models.

No. Never mix modular PSU cables unless the PSU manufacturer officially confirms compatibility. Wrong modular cables can damage the PSU, graphics card, drives or motherboard.

No. This is a power cable only. It does not carry PCIe data and does not replace the motherboard PCIe slot used by the graphics card.

No. It does not improve GPU performance. It only provides a physical 6-pin PCIe power connection when the PSU and graphics card are compatible.

Possible causes include an underpowered PSU, weak 12V rail, loose connector, faulty GPU, overloaded Molex cable, incompatible graphics card or PSU protection triggering under load.

No display can be caused by a loose GPU, insufficient power, wrong display cable, wrong monitor input, missing drivers, incompatible BIOS, faulty card or using a CPU/motherboard configuration that needs troubleshooting.

Shut the PC down immediately, unplug it and stop using the adapter until the PSU, cable and GPU requirements have been checked. Heat at a connector can indicate overload or poor contact.

Avoid adding extra load to the same Molex cable chain used for GPU power. Keep the GPU adapter as lightly loaded as possible and use separate PSU cables for fans or accessories where available.

It is not recommended. If your graphics card needs multiple PCIe power connectors, you should use a PSU with proper native PCIe GPU cables instead of relying on several Molex adapters.

Only if the PSU and GPU power requirements are safely within limits, which may not be the case. Many low-wattage or older PSUs are not suitable for graphics cards that need auxiliary PCIe power.

It can work with compatible desktop PSUs that provide standard 4-pin Molex peripheral connectors, but PSU wattage, 12V output, cable condition and connector quality still matter.

It is physically simple to connect, but it is not automatically safe for every system. You must confirm GPU power requirements, PSU capability and correct connector use before powering on the PC.

Some older and lower-power graphics cards use one 6-pin PCIe connector. Always check the exact GPU model, because many cards that look similar may require 8-pin, dual 6-pin or newer power connectors.

Check that your GPU needs one 6-pin PCIe connector, your PSU has two spare Molex connectors, your PSU has enough wattage and 12V output, your system is not high-power, and the 20cm length is enough for your case layout.

This cable is not ideal for users with modern high-power GPUs, 8-pin PCIe GPUs, 12VHPWR or 12V-2x6 GPUs, weak or very old PSUs, mining rigs, high-load gaming systems, damaged Molex connectors, modular PSU cable confusion, or users who need a long-term safe upgrade path. In those cases, a quality PSU with native PCIe GPU power cables is the better choice.

Buying the Cables Direct Twin Molex to 6 Pin PCIe Power Cable from Memox is a practical choice if you need a short 20cm 18AWG internal adapter for a compatible older desktop PC and lower-power 6-pin PCIe graphics card setup. Memox offers PC power cables, adapters, graphics card accessories, power supplies, cases, motherboards, RAM, SSDs, storage, cooling products and computer accessories for UK customers.