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Black ATX 12-pin to dual 8-pin and 6-pin GPU splitter cable

SMUGDESK

SMUGDESK ATX 12Pin to Dual 8Pin & 6Pin GPU Splitter Cable for AX850 AX750 AX650 PSUs

SKU CH-DH1B-V0EJT

ATX 12-pin splitter delivers dual 8-pin and 6-pin power for RTX 3080 and 3090 cards from AX850, AX750 or AX650 PSUs

  • Powers RTX 3080 and 3090 GPUs with stable current delivery
  • Designed specifically for AX850, AX750 and AX650 modular PSUs
  • Single 12pin input splits to dual 8pin plus 6pin connectors
  • Heavy-duty wire construction maintains steady power for high-performance cards
  • Optimised cable length reduces internal clutter for cleaner builds

GPU Power Splitter for AX Series PSUs

This SMUGDESK cable adapts a single ATX 12pin output from AX850, AX750 or AX650 modular power supplies into dual 8pin and 6pin connectors. It targets builders running RTX 3080 or 3090 graphics cards that require multiple power inputs. The splitter replaces missing or short native cables in Corsair AX series units.

Connector Limits and Current Delivery

The 12pin source must come from a compatible AX modular port; other PSU brands or non-modular units cannot use this cable. Each 8pin and 6pin plug follows standard PCIe pinouts, so total draw is limited by the PSU’s 12 V rail rating rather than the cable itself. Mixing this adapter with daisy-chained cables on the same rail can exceed safe current per wire.

Installation Notes and Common Issues

Routing is straightforward: seat the 12pin firmly into the PSU, then attach GPU plugs until they click. The fixed lengths suit mid-tower layouts but may fall short in large cases or behind vertical GPU brackets. Builders sometimes force the 12pin upside down, bending pins, or assume the cable adds extra wattage beyond the PSU’s rated output.

How it compares

Measured against everything we stock in PC Power Cables, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 70% of the 1,029 comparable items (median $15.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Should I pick the AX850, AX750 or AX650 version of this cable?

The same splitter works with all three AX series PSUs — AX850, AX750 and AX650 — because it plugs into the modular 12pin port they share.

What does the 12pin to dual 8pin plus 6pin layout do for my RTX 3080 or 3090?

It converts one modular 12pin output into the two 8pin and one 6pin connectors those cards need, delivering the required power from a single PSU port.

Does the ATX 12pin interface limit the power I can draw through the 8pin and 6pin plugs?

The cable is built for the AX850, AX750 and AX650 supplies, so the practical limit is the PSU's own rated output rather than the 12pin connector itself.

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