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Cable Matters 2-Pack 2 Way 4 Pin PWM Fan Splitter Cable - 4 Inches, PC Fan Splitter 1 to 2 Converter, PC PWM Extension Cable
Cable Matters

Cable Matters 2-Pack 2 Way 4 Pin PWM Fan Splitter Cable

Bottom line: The Cable Matters 2-Pack 2 Way 4 Pin PWM Fan Splitter Cable ($5.59 on Amazon as of 2026-10-06): 2-pack supports up to 4 fans from two headers; main trade-off: 4-inch length limits fan placement to nearby mounts.

$5.59

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Buy on Amazon — $5.59 Compare to similar power supplies & cables

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 2-pack supports up to 4 fans from two headers
  • ✓ PWM signal passes to both fans for synced speeds
  • ✓ RPM pin omitted on second fan, so BIOS reads one clean speed
  • ✓ Black sleeved and wrapped for tidy open-case builds

Cons

  • ✗ 4-inch length limits fan placement to nearby mounts
  • ✗ Only splits 1 to 2, so wide arrays need multiple cables
  • ✗ Second fan reports no RPM to the motherboard
  • ✗ Needs a motherboard with PWM control to sync speeds

Manufacturer description

The Cable Matters 4-Pin PWM Fan Splitter solves a common build problem: more case fans than motherboard headers. Each 4-inch Y cable runs two fans off a single 4-pin header, and because the splitter passes PWM control to both connectors, your motherboard software ramps them together instead of locking one fan at full speed. The cable transmits the RPM tachometer signal from the first fan only, omitting the sense pin on the second so your BIOS reads one clean speed figure rather than two conflicting ones. You get two splitters in the pack, so a single purchase can take one header up to four…

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SpecPicks Verdict

SpecPicks scored Cable Matters 2-Pack 2 Way 4 Pin PWM Fan Splitter Cable 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 both fans run at the same speed with this splitter?

Yes, provided your motherboard supports PWM control. The splitter passes the PWM signal to both 4-pin connectors so the fans spin in tandem from one header.

Why does only one fan show up in my BIOS fan monitor?

By design. The cable transmits the RPM signal from the first connector only and omits the sense pin on the second, so the motherboard reads a single consistent speed.

How many fans can I connect with this purchase?

It is a 2-pack of 1-to-2 splitters, so up to 4 fans across two motherboard headers. Check your board's per-header amperage rating before loading it up.

Does it work with 3-pin fans?

Yes. The splitter is listed as compatible with both 3-pin and 4-pin case fans, though 3-pin fans run at voltage-controlled or full speed rather than PWM.

Is the cable long enough to reach fans on opposite sides of my case?

Probably not. Each splitter is 4 inches, so it is built for fans mounted near each other or near the header. Longer runs need a separate extension cable.

Key Features

  • Dual Fan Connection: This PC fan splitter Y cable connects 2 computer case fans to a single motherboard fan header. This 1 to 2 case fan splitter is ideal for adding an extra fan to boost airflow inside your computer case.
  • 4-Pin Fan Header Support: Mobo 4 pin fan splitter connects to the 4-pin header on your motherboard and splits the PWM signal to 2 PWM fans. Both fans can spin at the same speed using motherboard software with PWM control support.
  • Sync for Consistent Speeds: Master/slave PWM splitter includes a 4 pin fan connector that transmits the RPM signal to the motherboard, ensuring synchronized fan speeds for both fans. The computer fan splitter omits the RPM signal pin on the second fan for tandem operation.
  • Tidy Setup with PWM Y Cable: Double CPU fan splitter supports up to 4 fans using this cost-effective 2-pack of fan header splitter cables. The black-sleeved and wrapped 4-inch PWM Y splitter cable ensures a clean and organized build—perfect for open computer cases.
  • Works with 3-Pin & 4-Pin Case Fans: 3-pin & 4-pin fan compatible with popular cooling fans such as Corsair Air Series AF120 80mm / AF140 High Airflow, Cooler Master Blade Master 80 / Master 92, Cooler Master Hyper 212 EVO 120mm, JetFlo 120mm, SickleFlow 120mm, MegaFlow 200mm, Noctua NF-F12, and Thermaltake WATER 3.0 Dual 240.

Full Specifications

BrandCable Matters
ColorBlack
Model104040x2
Wattage12 watts
Cable Type4-Pin
Item ShapeRound
Model Name104040x2
Item Length4 Inches
Part Number104040x2
CompatibilityPC
Connector Type4-pin Fan Port
Number of Pins4
Outer MaterialPlastic
Maximum Voltage12 Volts
Number of Items2
Special FeaturePWM
Connector GenderMale-to-Female
Specification MetRoHS
Compatible DevicesComputers
Indoor Outdoor UsageIndoor, Outdoor
Full listing titleCable Matters 2-Pack 2 Way 4 Pin PWM Fan Splitter Cable - 4 Inches, PC Fan Splitter 1 to 2 Converter, PC PWM Extension Cable

Ready to buy?

Cable Matters 2-Pack 2 Way 4 Pin PWM Fan Splitter Cable - 4 Inches, PC Fan Splitter 1 to 2 Converter, PC PWM Extension Cable 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.

Buy on Amazon — $5.59

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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Cable Matters 2-Pack 2 Way 4 Pin PWM Fan Splitter Cable - 4 Inches, PC Fan Splitter 1 to 2 Converter, PC PWM Extension Cable
$5.59
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