Corsair HX650w 650W ATX PSU

Cables, Connectors & Internal Organs

Corsair HX650w

Around the front of the unit we have the modular cable connector area which consists of five propitiatory flat style connectors and two 6-Pin PCI-E connectors. As you will have probably guessed, the flat style connectors are used for the SATA and Molex modular cables, whereas the PCI-E style connectors are used for....the PCI-E graphics card cables. This is exactly the same layout as the HX620W (but different to the HX750W/HX850W), and most likely indicates that Corsair decided to use the same OEM for the HX650w as they did for the HX620w (Seasonic), rather than finishing off their new HX range with just CWT built units.


In addition to the modular connectors, two essential cables - the EPS-12v and ATX are hard wired into the unit. This not only ensures that critical system components get a good; clean supply of power direct from the PSU, but also avoids potential situations where an ill-fitted modular cable could cause system instability or even kill components.

Corsair HX850W Connectors
 ATX Connector Native 1x 20+4 Pin
 EPS-12v / P4-12v Connector(s) Native 1x 4+4 Pin
 Molex Connectors Modular 8x
 Floppy Disk Connectors Modular 2x
 SATA Connectors Modular 9x
 PCI-E Connectors Modular 2x 6+2 Pin


A total of 7 modular cables has been included by Corsair, meaning that every cable can be plugged into the unit at the same time. Although it's sometimes nice to have a few spares of each modular cable type, It's highly unlikely that the average user buying a 650W PSU will be using more than eight molex or nine SATA connectors in their system.

While on the subject of modular cables, its good to see that Corsair have stuck with the black ribbon style wires rather than going down the sleeving route. Personally I love the look of these cables as they are easily camoflaged inside a case with black internals and look so much more professional than wires wearing a pear of stockings! Of course, the only downside to them is that they only bend easily in two directions (much like a PATA cable) meaning that they are slightly less flexible than normal bunched cables which can bend in any direction.


Going in for a closer look at the ATX 24-Pin, EPS 8-Pin and PCI-E 8-Pin connectors we can see that Corsair have retained compatibility with older/lower range motherboards and graphics cards by allowing certain parts of the connectors to be snapped off  in order to support 20-Pin, 4-Pin and 6-Pin standards respectively. This feature has been dropped from a lot of manufacturers PSU's, so it's good to see that Corsair realise the importance of keeping this feature on the lower wattage models.

The Guts

With the HX620W literally rocketing Corsair's PSU venture into success, its understandable that they wouldn't want to make too many changes to the HX650W. This is certainly visible when you lift the lid off the HX650W, as the general layout at least, is pretty much a direct clone of its predecessor.



Everything inside the unit is well arranged with all cables on the output side tidily bunched together. A black PCB replaces the original green PCB of the HX620W maybe hinting that Corsair have got a little more specific with their requirements from Seasonic this time around. The main transformer for the +12v, +5v and +3.3v rails inside the unit is positioned right up against the modular backplane with a smaller transformer solely responsible for the 5vSB (stand-by voltage) rail over on the right.


Sitting slap bang in the middle of the unit is a tasty Japanese manufactured Nippon Chemicon capacitor that performs a large part of the input filtering for the primary side of the unit. The markings on the capacitor suggest that it is rated up to 400v at 105°C with a respectable 560 micro Farads (uF) capacitance. Over on the secondary (low voltage) side are a collection of various spec capacitors, once again all manufactured by Nippon Chemicon.


An EMI filtering circuit has been installed just behind the AC inlet on a rather tidy PCB. This should help to keep any internally generated noise from the MOSFET's and other components contained within the device, while also preventing any external AC line noise from entering the PSU. And finally a 7 blade 120mm brushless fan manufactured by ADDA keeps everything cool.

This fan carries a model number of AD1212HB-A71GL and is actually the very same fan used inside the HX620W. Lets check out the specs:

Model: AD1212HB-A71GL
Size: 120mm x 120mm x 25mm
CFM: 85.2cfm
dBA: 39.1dba
RPM: 2200rpm

During a recent conversation with Corsair they tell me that the fan profile for the HX650w has been adjusted to be even quieter than the HX620W. This is probably owing to the (hopefully) higher efficiency of the HX650W with less energy being wasted as heat.

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Most Recent Comments

15-01-2010, 03:57:33

Great review Jim, your test area must look like a NASA lab room :P Great to see you back mind ;-)Quote

15-01-2010, 04:42:40

Cheers mate. And yea, when people come round they do give me a bit of a strange "are you a terrorist or something" look Quote

15-01-2010, 05:01:22

Is the 7 year warranty applicable to the modular (HX) series only, or does it cover the TX PSU's as well? local etailers have variously listed 5 and 7 year warranty's. Not a major as I'm sure either would last the distance. Awesome review.Quote

15-01-2010, 05:10:31

The TX950w I've got here has a 5yr warrenty. So I'd imagine that applies to the rest of the TX series too.Quote

15-01-2010, 07:32:32

good review, makes me glad i bought 1 !Quote

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