Will this allow a pwm fan controller to manage the speed of a molex fan?

No, unless the fan controller is a standalone unit that is not connected to the fan headers on the motherboard, such as the NZXT Sentry 3. If you look closely at the item photo, you'll see that it only has 2 wires running to the fan, 12v hot & ground. Plugging in this adaptor will cause the fan to run at full speed, which will be loud as heck.

how long is the wire?

The cable is about 6-7 inches long.

Does this deliver the full 12v to the molex?

Assuming the 3pin sources is 12v, yes.

daisy chaining 5 4 pin molex fans, needing them to go to 3 pin male on motherboard, will this work?

It should but there could always be compatibility problems, Id just get one first and if it works then get more.

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3pin power to 4pin molex adapter

Product ID: 515292989

Details

Compatible devices
Computer Fans
Specific uses for product
personal
Connector type
4 pin molex
Colour
black
Item dimensions L x W x H
15 x 9.1 x 0.5

📏Compact space-saving design

🔌3-pin to 4-pin power conversion

🖥️Universal fan compatibility

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Description

⚡ Power your fans like a pro—compact, compatible, and cost-savvy!

RELIABLE READY - Durable design ensures steady power delivery for consistent fan operation.
SLEEK SPACE SMART - Minimal footprint keeps your rig clean and airflow optimized.
BUDGET FRIENDLY UPGRADE - Premium performance without breaking the bank—smart investing for your build.
PLUG PLAY POWER BOOST - Effortlessly connect your 3-pin source to 4-pin Molex fans—no tech hassle.
UNIVERSAL FAN COMPATIBILITY - Works seamlessly with most computer fans for ultimate setup flexibility.

The OKGEAR 3-pin Power to 4-pin Molex Adapter is a compact, lightweight solution designed to convert 3-pin power sources to 4-pin Molex connectors, enabling broad compatibility with most computer fans. Its space-saving design and affordable price make it an essential upgrade for maintaining efficient cooling in professional and enthusiast PC builds.

Specifications

Package Dimensions L x W x H	13.7 x 6.7 x 1 centimetres
Package Weight	0.02 Kilograms
Product Dimensions L x W x H	15 x 9.1 x 0.5 centimetres
Item Weight	0.03 Pounds
Brand	OKGEAR
Colour	black
Part number	840556028932
Guaranteed software updates until	unknown

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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87711CFA

Duties & taxes included

In stock

Sold byAmazon Cote D' IvoireDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Cote D' Ivoire.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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