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ZM500-GS 500W Power Supply
(10 customer ratings / 2 reviews)
ZM450-GS 450W Power Supply
(12 customer ratings)

Zalman GS Series Quiet Power Supplies

Zalman have introduced a very cost effective PSU in the new GS series. The only thing that is low is the price! The build quality, performance and reliability remain as high as you would expect from a Zalman product.


  1. Two Forward Switching design
  2. Less than 1W standby power
  3. Meets ErP Lot 6, standby power and efficiency standards
  4. Ultra-quiet 120mm fan

Two-Forward Switching Circuit Design

Two-Forward Switching Design minimises switching loss and internal heat for enhanced reliability and stability.

Active PFC for Improved Power Factor and Reduced Harmonics

By implementing an Active PFC (Power Factor Correction), instead of a Passive PFC with a Power Factor (PF) of 75%, PF has been improved up to 99% while harmful harmonic frequencies have been reduced to meet the Line Harmonic Distortion Requirement of IEC61000-3-2 Class D.

Ultra Quiet 120mm Fan

Ultra quiet 120mm cooling fan increases airflow while minimising noise for a superbly quiet computing environment.

Maximum Efficiency & Energy Savings

The energy efficient Green IC circuitry consumes much less standby power (less than 1W) compared to other PSUs without this feature. The GS PSUs also meet ErP Lot 6 2010 Standby Power, WEEE and RoHS Standards

ATX12V ver2.3

The latest PSU design standard is incorporated for compatibility with a wide range of CPUs, motherboards, and graphic cards.

Dual Rail +12V DC Output

Two independent +12V outputs for core components facilitate highly stable operation.

Dual Graphics Card Support

One 6 Pin and one 6+2 Pin power connectors for PCI Express support dual graphics card system.

Design Optimised for Cooling

Hexagon-shaped mesh design effective cools the unit and maximises airflow.

Sleeved DC Output Cables

DC Output Cables are sleeved for easy cable management and improved air circulation inside the computer case.

Safe and Stable Power Supply

Safety features include Over-Voltage Protection, Short-Circuit Protection, Under-Voltage Protection, Over-Power Protection safeguard the system.


Efficiency84% Maximum @230VAC, Typical load
+3.3V max load22 A
+5V max load18 A 19 A
+12V1 max load21 A 24 A
+12V2 max load18 A
Combined maximum output +3.3V / +5V120 W
-12V max load0.3A
+5VSB maximum standby current2.5 A
Fan120mm non-LED
Number of Molex connectors4
SATA connectors6
Number of floppy drive connectors1
Dimensions140(L) x 150(W) x 86(H) mm
Master power on/off switchYes
ATX12V version2.3
ATX12V (4+4-pin) supportYes
20+4-pin ATX connectorYes
PCI-E supportOne 6-pin and one 6+2-pin
Mains input voltage230 VAC, 50-60 Hz
Fan speed controlThermal
Safety FeaturesOVP, SCP, UVP, OTP
EMC, safety approvalsCE, CB, RU, MIC
Length of 20+4-pin ATX Connector500mm
Weight2.0 Kg
Haswell C6/C7 compatibleYes
Warranty36 months
EAN barcode8809213763144 8809213763151

Customer Reviews


Great Value


This power supply is great value for money. Very quiet and easy to fit. All leads are carefully sheathed, with plenty of extra connections for upgrades etc. Worth every penny.

Zalman ZM500-GS Power Supply


Very good value for money, costing only a few pounds more than my previous budget CIT550w product. The Zalman is well built with individually sleeved & heat shrunk cables of adequate length, enough connectivity for most users and yes as you would expect from Zalman it's quiet, not "silent" but more so than many other budget power supplies on the market. Thank you Quiet PC.

We haven't received any reviews of this product yet.


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