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CRJ 3-Pin Fan Header to 12V 4-Pin Molex Power Adapter Cable - 12 inch (30cm), Black Sleeved - Power 4-Pin Peripheral Molex Devices from PC Fan Headers
CRJ Electronics

CRJ Electronics CRJ 3-Pin Fan Header to 12V 4-Pin Molex Power Adapter Cable

Bottom line: The CRJ 3-Pin Fan Header to 12V 4-Pin Molex Power Adapter Cable is a specs-and-price decision rather than a crowd-consensus one in the power supplies & cables category, priced around $7.99 on Amazon as of 2026-10-06. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

$7.99

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Buy on Amazon — $7.99 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

  • ✓ Total cable length (including connectors) is 12 inches (30cm)
  • ✓ Backed by CRJ Electronics's warranty and support channels

Cons

  • ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

Manufacturer description

This cable is as simple as it appears. Power watercooling pumps and other 12V 4-pin devices using a fan header. The output current is limited to the capabilities of the fan header that this cable is connected to. Modern PC motherboards are now commonly available with higher output current capacity fan headers (W_PUMP+ fan header on ASUS motherboards as an example). Due to the possibility of connecting things not intended for a fan header the exercise of due diligence is absolutely necessary. Please reference the manufacturer documentation of your devices to avoid current overdraw.

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SpecPicks Verdict

SpecPicks scored CRJ 3-Pin Fan Header to 12V 4-Pin Molex Power Adapter Cable using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies & cables category. CRJ Electronics'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.

Key Features

  • Designed specifically to eliminate the need for a power supply 4-pin peripheral molex connection due to the high output current fan headers found on many modern ATX motherboards.
  • Compatible with 4-pin peripheral molex power water pumps and other 12V input devices (please exercise due diligence to avoid damage from current overdraw and disable 3-pin fan speed control in BIOS to ensure 12V output from the fan header)
  • RoHS Compliant. Each cable is constructed with all black connectors and high density black sleeving for minimal wire visibility.
  • NOTE: Please take care to align the pins when making the 4-pin peripheral connection as they are under some tension from the sleeving.
  • Total cable length (including connectors) is 12 inches (30cm)

Full Specifications

NOTEPlease take care to align the pins when making the 4-pin peripheral connection as they are under some tension from the sleeving.
BrandCRJ Electronics
Model4058
MaterialPolycarbonate (PC)
Cable TypeFan Header Cable
Unit Count1.0 Count
Item Length12 Inches
Part Number4058
CompatibilityPC
Material TypePolycarbonate (PC)
Wire Diameter0.64 Millimeters
Connector Type3-pin Fan, 4-pin Molex
Recommended Uses For ProductPowering 12V 4-pin devices from a PC's fan header
Full listing titleCRJ 3-Pin Fan Header to 12V 4-Pin Molex Power Adapter Cable - 12 inch (30cm), Black Sleeved - Power 4-Pin Peripheral Molex Devices from PC Fan Headers

Ready to buy?

CRJ 3-Pin Fan Header to 12V 4-Pin Molex Power Adapter Cable - 12 inch (30cm), Black Sleeved - Power 4-Pin Peripheral Molex Devices from PC Fan Headers 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 — $7.99

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

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CRJ 3-Pin Fan Header to 12V 4-Pin Molex Power Adapter Cable - 12 inch (30cm), Black Sleeved - Power 4-Pin Peripheral Molex Devices from PC Fan Headers
$7.99
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