GIGABYTE P650B 650W Power Supply Review


The GIGABYTE P650B packaging is identical in design to that which we saw with the P750GM. The basic layout has a black and gold color scheme with a picture of the included unit on the front. The front of the package also has some advertising points like “Silent Fan”, “Japan Capacitors”, “Single +12v”, and the 80 Plus Bronze seal. When we check the 80 Plus website we find that this unit is listed and, as such, we will see how it does in this regard later.

The rear of the packaging has some more advertising bullet points that expand somewhat on what we found on the front. In addition to this, we find the power label (reproduced below) and the connector count (reproduced below). For some reason, much of these two tables are also reproduced on the side again. It is almost like GIGABYTE thought every side of the packaging needed to have information on it and they ran out of information to put on it. We see this again when we look at the bottom of the packaging and we find an efficiency graph and a fan noise graph.

Now, in all of this text, we never find the warranty, and it isn’t in the manual either. We finally find it on the website listed as “3 years warranty (adjusted according to different regions)”. So, good luck to you all on which region you find yourself in (adjusted accordingly of course)!

GIGABYTE P650B 650W Power Supply Connector Type
GIGABYTE P650B 650W Power Supply Voltage and Wattage Specs

The GIGABYTE P650B is advertised as being a single 12v rail power supply with a capacity up to 54A (or ~99% of the unit’s capacity) if necessary. The 5v and 3.3v rails have a capacity of 15A and 18A respectively with the combined capacity of those two rails being 108W. Combined with these outputs, we find that this unit has 4 PCIe connectors, 6 SATA connectors, and 3 Molex connectors.

Once we open the GIGABYTE P650B packaging we find the power supply, mounting screws, the power cord, and the “user manual”. The user manual is the tiniest piece of paper folded like an accordion and contains zero useful information. Once more, it is a total waste of space from GIGABYTE on this front. Let’s move on to the unit itself now.

Paul Johnson
Paul is a long time PC hobbyist and tech enthusiast having gotten his start when he broke his first C64 quickly followed by breaking his first IBM XT. Most notably however, for 12 years, he served as the Power Supply Editor for one of the truly early, groundbreaking, and INDPENDENT PC enthusiast sites ([H]ardOCP) until its mothballing in April of 2019. Paul now brings the same flair and style of his power supply reviews to

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