Corsair CX750 750W Power Supply Review

The Corsair CX750 is, "An ideal choice for value-conscious system builders and upgraders." So when saving a few bucks and buying a Corsair Bronze rated power supply do you still get a PSU that can deliver clean power under load? We are hoping that fewer bells and whistles does not equate to less quality in the wattage department.



The first thing we are going to look at with the Corsair CX750 is its packaging, accessories, and documentation. While normally none of these items is a make or break item for a power supply the packaging quite often contains a lot of information about the product we are purchasing. The inclusion of an owner’s manual that provides actual information about our product is also of great help in many situations. Accessories are almost unnecessary with a power supply as the unit is self contained, unless it is modular, but there cases where a manufacturer can include useful accessories to make installation, routing and use more efficient.

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The packaging of the Corsair CX750 is very similar to other non-premium power supplies from Corsair like the CS550M. The front of the packaging has an imposed picture of the grill of a CX750 along with a small inset picture of a CX750 as well as a few seals including an 80 Plus Bronze label. When we check the 80 Plus website, we see that this unit has been certified by 80 Plus. Other than that, the front of the packaging is rather desolate so we swing to the rear of the packaging. When we move to the rear of the packaging, we find a lot more advertising about efficiency and fan noise including graphs for both features. We also see here on the rear that there is a power table which we have reproduced below as well as the connector count which we have also reproduced below. As we move around to the sides of the packaging, we find nothing of substance. Lastly, we find that this unit is covered by a 3 year warranty. This is certainly a let down given that other Corsair products carry longer warranties and recent other 750W products we have seen have had warranties up to 7 years in length. Certainly, for people that care about such things, the CX750 is already starting off at a severe disadvantage. Maybe Corsair is trying to tell us something?

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The power information for the CX750 is as we would expect from a modern 750W power supply. This particular unit boasts a single 12v rail rated at 62A or up to ~99% of the unit’s total capacity if necessary. When we look at the minor rails, we see that this unit has up to 25A available on the 3.3v and 5v rails each with a cumulative cap of 130W. This is surprisingly rather robust for modern power supplies and certainly nicer than what we get from a lot of other power supplies. Paired with this output, we find 4 PCIe connectors, 6 Molex connectors, and 8 SATA connectors. The PCIe connectors might be a bit much given that this unit is supposed to be a very much entry level product from Corsair, but the capacity on the minor rails seems very healthy. This arrangement is certainly enough for the VAST majority of users looking at such a product.

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Once we open the packaging of the CX750, we see the usual assortment of items including the power supply, power cable, mounting screws, zip-ties, user manual, and warranty card. As usual, the less said about Corsair's poor documentation the better and since there is nothing of interest in the manual saying less is easy! Let's move on now and see what the Build Quality looks like on this unit since the effort level here is quite low.