GameMax GT-300W 300W TFX Power Supply for Small Form Factor PCs

The GameMax GT-300W is a compact 300W TFX power supply designed for small form factor desktops and slim PC builds. It delivers dependable performance with 80 Plus Bronze efficiency for reduced energy consumption and stable power output. The PSU includes active PFC for improved voltage stability and built-in protection features including OPP, OVP, UVP, and SCP. A quiet 80mm temperature-controlled fan ensures efficient cooling with low noise levels, and the honeycomb ventilation design improves airflow. The unit supports ATX12V 2.3 motherboards and includes essential connectors for modern compact PC systems.

General Specifications
Model: GameMax GT-300W (PSUGMXGT300TFX)
Form Factor: TFX
Total Power: 300W
Efficiency Certification: 80 Plus Bronze
MTBF: 100,000 hours
Active PFC: Yes
Protections: OPP, OVP, UVP, SCP
Safety Approvals: CE, FCC, CB
Warranty: 2 Years

AC Input
Input Voltage: 100–240V
Input Current: 6–3A
Frequency: 50–60Hz

DC Output Rails
+3.3V: 15A
+5V: 15A
+12V: 20A
-12V: 0.5A
+5VSB: 2.5A

Power Timing
Power Good Signal: 100–500ms
Hold-Up Time: 1–40ms

Cooling
Fan Size: 80mm
Fan Type: Silent, temperature-controlled
Noise Level: Under 17 dBA

Connectors
1 x 20+4 Pin Motherboard Connector
1 x 4+4 Pin CPU Connector
3 x SATA Power Connectors
1 x Molex 4-Pin Peripheral Connector

Physical Specifications
Dimensions: 85mm x 65mm x 175mm
Weight: Approximately 1.06kg

Fast UK Shipping

We offer quick order processing within 1–2 working days across the UK. Order before 3:00 PM GMT/BST on weekdays for same-day processing.

Once the order is processed, the following options indicate respective delivery times.

Delivery Options:

• Basic: Free | 2–5 business days
• Standard: Free over £100 / £4.99 under £100 | 2–3 business days
• Express: £4.99 | 1–2 business days
• Premium Next-Day: £7.99 | Next business day.

Note: Delivery times are estimated and may vary due to courier delays or weather.

Hassle-Free Returns

Changed your mind? You can return unused items in original packaging within 14 days of delivery.

To request a return, email contact@lazymart.co.uk. We’ll provide instructions on how to proceed with a return. Refunds are processed within 5 business days after inspection.

Damaged or Incorrect Orders

If your item arrives damaged or incorrect, contact us within 24 hours with photos for a quick resolution.

Shipping & Returns Policies

For more details, view our Shipping Policy and Return Policy.

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