Does it have a 4 pin connector?

I agree with Jason V. All power supplies have that mainboard 4 pin. Are you referring to the older 4 pin MOLEX connector to power older parts? If so, yes, it has 2 of those.

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RAIDMAX XT Series RX-400XT 400 W ATX12V / EPS12V Non-Modular Power Supply (Brown Box) - OEM

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ATX12V / EPS12V
Non-Modular
80 PLUS BRONZE Certified
110 - 240 V 50/60 Hz
+3.3V@16A, +5V@16A, +12V1@28A, [email protected] ,[email protected]

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Overview

Specs

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General
Brand	RAIDMAX
Series	XT Series
Model	RX-400XT

Details
Type	ATX12V / EPS12V
Maximum Power	400 W
Fans	1 x 120 mm Fan
PFC	No
Main Connector	20+4Pin
+12V Rails	Single
PCI-Express Connector	1 x 6-Pin
SATA Power Connector	4
Max PSU Length	140 mm
Modular	Non-Modular
Efficiency	up to 78%
Energy-Efficient	80 PLUS BRONZE Certified
Protection	SCP, OVP, OPP
Input Voltage	110 - 240 V
Input Frequency Range	50/60 Hz
Input Current	15 A
Output	+3.3V@16A, +5V@16A, +12V1@28A, [email protected] ,[email protected]
MTBF	>100,000 Hours
Approvals	FCC, CE
Connectors	1 x 20+4-Pin Main Connector 1 x 4+4-Pin ATX12V/EPS12V Connector 1 x 6 pin PCI-E Connector 4 x 5-Pin SATA Connector 2 x 4-Pin Peripheral Connector 1 x 4-Pin Floppy Connector

Features
Features	SINGLE +12V output for higher power usage Honeycomb ventilation design for optimal heat dissipation Up to 4 or 5 SATA connectors supports multiple of hard drives Support C6/C7 power saving mode on intel Haswell CPU Compatible with Intel ATX12V V2.3 120 mm Silent fan with smart thermal fan speed control circuit Full protections with SCP, OVP and OPP.

Dimension & Weight
Dimensions	3.39" x 6.91" x 5.51"
Weight	2.98 lbs.

Additional Information
First Listed on Newegg	April 10, 2015

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Warranty

Limited Warranty period (parts): 2 years
Limited Warranty period (labor): 2 years
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Return Policies

Return for refund within: 30 days
Return for replacement within: 30 days
This item is covered by Newegg.com's 30-Day Return Policy.
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RAIDMAX XT Series RX-400XT 400 W ATX12V / EPS12V Non-Modular Power Supply (Brown Box) - OEM

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Customer Reviews of the Raidmax RX-400XT

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Warranty, Returns, And Additional Information

Warranty

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Manufacturer Contact Info

Item#: N82E16817152061

RAIDMAX XT Series RX-400XT 400 W ATX12V / EPS12V Non-Modular Power Supply (Brown Box) - OEM

Learn more about the Raidmax RX-400XT

Customer Reviews of the Raidmax RX-400XT

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info