We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular metal ATX power supply unit in black finish

In Win

In Win IW-P300A2-0 300 W ATX power supply

SKU CH-AXYV-XBH5Z MPN IW-P300A2-0

An ATX power supply delivering 300 W across 3.3 V, 5 V, 12 V, -12 V and 5 VSB rails for standard desktop builds

  • Max wattage300 W
  • Supply voltage115 / 230 V
  • AC input frequency50/60 Hz
  • Rated input current8A @ 115 V, 4A @ 230 V
  • Output type+3.3 V@28A,+5 V@30A,+12 V@15A,+5VSB@2A
  • Product typeATX
  • Delivers 300 W maximum power for stable system operation
  • Dual 115 V and 230 V input supports worldwide mains voltages
  • Operates at 50 Hz or 60 Hz for broad grid compatibility
  • Strong +3.3 V and +5 V rails provide 28 A and 30 A for legacy components
  • Dedicated +5 VSB rail supplies 2 A for standby functions

ATX 300 W power supply

The In Win IW-P300A2-0 is a standard ATX power supply rated for 300 W maximum output. It suits basic desktop builds or replacement of an existing unit in a compatible chassis.

Continuous 300 W delivery with dual-voltage input

The unit accepts 115 V or 230 V input at 50 Hz or 60 Hz, drawing 8 A at 115 V and 4 A at 230 V. Its +12 V rail supplies 15 A while the +3.3 V and +5 V rails deliver 28 A and 30 A respectively, providing stable power across all rails during sustained loads.

Verify ATX fit and connector needs before ordering

Ensure your case accepts a standard ATX form-factor supply and that your motherboard and drives match the available output connectors. The +5 VSB rail provides 2 A for standby functions, and the combined minor rails support typical legacy and current peripheral demands.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 97% of the 10,869 comparable items (median $142.99).
Max wattage 300 W
Lower than about 92% of the 930 comparable items (median 850 W).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameIN WIN
Model nameIW-P300A2-0
Product typeATX
Ports & slots
Output type+3.3 V@28A,+5 V@30A,+12 V@15A,+5VSB@2A
Power
Max wattage300 W
Supply voltage115 / 230 V
AC input frequency50/60 Hz
Rated input current8A @ 115 V, 4A @ 230 V
Size & build
Shipping weight2.27 kg
Package size140 × 127 × 102 mm

Questions about this item

How much heat and fan noise should I expect from the 300 W unit when it runs continuously?

The supply draws 8 A at 115 V or 4 A at 230 V and delivers up to 300 W, so sustained load will produce typical ATX heat and fan noise for a 300 W design.

Which motherboard and drive connectors must my case already provide for this ATX power supply to work?

The unit follows the ATX form factor and provides +3.3 V at 28 A, +5 V at 30 A, +12 V at 15 A and +5 VSB at 2 A through standard ATX output leads.

Will the +12 V rail at 15 A support older AGP graphics cards and IDE drives I want to keep?

The +12 V rail supplies 15 A and the +5 V rail supplies 30 A, matching the power needs of many legacy AGP cards and IDE devices.

More in ATX Desktop Power Supplies

Similar items