Corsair Professional Series Gold AX 650 W 3

Corsair Professional Series Gold AX 650 W Review

Packaging, Contents & Exterior »


CMPSU-650AX Features & Specs
Max. DC Output650W
Efficiency80 PLUS Gold
Operating temperature0°C - 50°C
ProtectionsOver Voltage Protection
Under Voltage Protection
Over Current Protection
Short Circuit Protection
Cooling120 mm Double Ball Bearing Fan
Dimensions150 mm (W) x 86 mm (H) x 160 mm (D)
Weight1.7 kg
ComplianceATX12V v2.31, EPS 2.92
Warranty7 years
Price at time of review (exc. VAT)$149.99

Efficiency is Gold and unfortunately the same goes for its price too. At $150 it's one of the most expensive 650W PSUs in the market. The PSU can deliver its full power even at 50°C ambient, the only protections missing are OPP (Over Power Protection) and the relatively rare OTP (Over Temperature Protection), the fan is equipped with ball bearings for extended lifespan and its footprint is small. Finally, someone surely cannot miss the seven year warranty that Corsair offers with this unit (and all AX PSUs as well). Such a long warranty period provides the ultimate peace of mind to the future buyer.

CMPSU-650AX Power Specs
Max. Power25A25A54A3A0.5A
Total Max. Power650W

There is only one +12V rail which can deliver the unit's full power, something very convenient since all modern systems draw power mainly from this rail. The minor rails have more than satisfactory power and the 5VSB rail is strong enough with 3A max power.

Cables & Connectors, Power Distribution

Modular Cables
ATX connector (610mm)24 pin
4+4 pin EPS12V/ATX12V (650mm)1
6+2 pin PCIe (600mm)4
4 pin Molex (400mm+150mm+150mm+150mm)8
SATA (400mm+150mm+150mm+150mm)8
FDD (+100mm)2

The PSU utilizes a fully modular cabling design and all cables are fully sleeved, except the peripheral/SATA connectors which use ribbon cables. Unfortunately Corsair/Seasonic considered that two EPS connectors in a 650W PSU would be too much so they equipped the AX650 with only one EPS connector. However there are four PCIe connectors along with many SATA and peripheral connectors. Strangely enough the number of peripheral connectors is equal to the SATA ones and this is odd because less and less components nowadays use peripheral connectors. In general all cables are long enough and the distance among the connectors is adequate. Finally all connectors use 18AWG which is the recommended, by ATX spec, wire size.

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