CoolMax CX-550B 550W
Category: Power Supply
Manufacturer: CoolMax
Wattage: 550W
Efficiency: 80+
Modular: non-modular
Price: $66.47 from Amazon

CoolMax CX-550B 550W
Wattage
550W
Efficiency
80+
Modular
non-modular
Best price from Amazon
$66.47
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Overview
This is a 550W unit with 80+ efficiency certification and non-modular cabling. It uses the ATX form factor — confirm your case lists ATX support. 550W covers mainstream builds with a modest GPU. Skimping on the PSU is a false economy; better efficiency ratings usually mean better components and longer warranties.
Expect to pay around $66.47, which lands it among mid-range options. Drop it into the PlanMyPC builder to check compatibility with the rest of your parts and compare current power supply prices across retailers. Warranty coverage follows CoolMax's standard policy — confirm regional terms on the listing. Scroll down for the complete spec table; the builder's compatibility checker will warn you about any conflicts with components you have already picked.
| Specification | Value |
|---|---|
| Modular | non-modular |
| Wattage | 550 W |
| Efficiency | 80+ |
| Form Factor | ATX |





