Cooler Master GX 650W Bronze 2

Cooler Master GX 650W Bronze Review

Packaging, Contents & Exterior »


Coolermaster GX650W Bronze Features & Specs
Max. DC Output650W
Efficiency80 Plus Bronze
Operating temperature0°C - 40°C
ProtectionsOver Voltage Protection
Under Voltage Protection
Over Temperature Protection
Over Power Protection
Short Circuit Protection
Cooling 120mm Sleeve Bearing Fan (AD1212HS-A71GL)
Dimensions150 mm (W) x 86 mm (H) x 140 mm (D)
Weight2.1 kg
ComplianceATX12V v2.3, EPS 2.91
Warranty5 years
Price at time of review$94 (MSRP)

Warranty remained the same as on the previous model and it's pretty long for a PSU of this price range. Regarding the unit's protections, all but Over Current Protection (OCP) are present. In a single rail PSU with 52A at +12V OCP is not needed since, if there is a short then OCP's trigger point will be too high to avoid the melting of the wires. In single rail PSUs with mid-high wattage Over Power Protection (OPP) and UVP (Under Voltage Protection) keep the PSU safe if a short somehow happens. Finally, the maximum operating temperature of the PSU is only 40°C, according to CM, but we will crank up the temperature in the hot box up to 50°C and see how it goes.

Coolermaster GX650W Bronze Power Specs
Max. Power25A25A52A2.5A0.5A
Total Max. Power650W

The single +12V rail is very powerful since it is able to deliver up to 96% of the PSU's maximum rating capacity. This sounds a little weird because, as we will see in the internal's description, the PSU does not utilize DC-DC converters for the minor rails generation, so +12V circuitry shares many crucial components with the minor rails and if we take into account that the 5V&3.3V combined max power is 150W then 52A from +12V alone sounds very optimistic. During our second crossload test (CL2) things will clear out.

Cables & Connectors, Power Distribution

Native Cables
ATX connector (500 mm)20+4 pin
4+4 pin EPS12V (600 mm)1
6+2 pin PCIe (500 mm)2
4 pin Molex (500 mm+100 mm+100 mm) / FDD (+100 mm)3 / 1
SATA (500 mm+100 mm+100 mm)6

Cable length is sufficient but the distance among the connectors is too small. ATX spec recommends 150 mm and here we have only 100 mm. Also there are very few peripheral (4 pin Molex) connectors, a 650W unit should have at least 2-3 more. Finally all connectors use 18 AWG wires, the recommended size by ATX spec.

Since this PSU features a single +12V rail we do not have anything to comment about its power distribution.
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