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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OKGEAR 3pin Power to 4pin molex Adapter

Product ID: 13235501

Details

Color
black
Compatible Devices
Computer Fans
Connector Type
4 pin molex
Item dimensions L x W x H
5.9 x 3.6 x
Specific Uses For Product
personal

⚡Supports stable 12V, 12W power delivery

🔌3-pin to 4-pin seamless power conversion

🖤Compact matte black design for sleek setups

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Description

🔌 Power your cool with precision and style!

TRUSTED PERFORMANCE - Backed by a 4.4-star rating and reliable 12V power for consistent fan operation.
BUDGET SMART UPGRADE - Affordable adapter that elevates your system without breaking the bank.
PLUG PLAY SIMPLICITY - Effortlessly connect your 3-pin power source to any 4-pin Molex fan—no tech hassle.
SPACE SAVING MINIMALISM - Ultra-slim profile keeps your rig clutter-free and airflow optimized.
UNIVERSAL FAN COMPATIBILITY - Works flawlessly with most computer fans, ensuring your build stays cool and efficient.

The OKGEAR 3-pin Power to 4-pin Molex Adapter is a compact, matte black connector designed to convert 3-pin power sources into 4-pin Molex outputs, delivering stable 12V/12W power. Compatible with most computer fans, it offers an easy plug-and-play solution to keep your system cool and organized, all at an affordable price point.

Specifications

ASIN	B000H25PBK
Best Sellers Rank	#4,609 in Computer Cable Adapters #8,599 in Audio & Video Connectors & Adapters
Brand	OKGEAR
Color	black
Compatible Devices	Computer Fans
Connector Type	4 pin molex
Customer Reviews	4.4 4.4 out of 5 stars (198)
Finish	Matte
Input Voltage	12 volts
Item Dimensions	5.9 x 3.6 x 0.2 inches
Item Weight	13.61 g
Manufacturer	Coolerguys
Mfr Part Number	840556028932
Model Number	4330584101
Nominal Power	12 watts
Number of Items	1
Number of Ports	2
Package Quantity	1
Specific Uses For Product	personal
UPC	840556028932
Unit Count	1 Count
Warranty Type	Limited

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€ 11.56

Duties & taxes included

In stock

Sold byAmazon CyprusDelivered 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 Cyprus.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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