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Testing Participants

Corsair AX 760 and 860

The two PSUs have identical packaging and accessories except for the wattage rating indicated on the box.

The medium-sized box is painted black and red, just like with the AX 1200i we tested earlier.

On the back of the box you can find a brief description of product features, a list of power connectors, and charts with specified output power, efficiency, and fan regulation algorithm.

The accessories include a bag with detachable cables, a simple fabric pouch for the PSU itself, a Corsair sticker for your computer case, a few single-use cable straps, mounting screws, a user manual and a warranty brochure.

Exterior Design

One glance is enough to identify the actual maker of this PSU. The nonstandard design of the case, the characteristic shape of the Sanyo Denki impeller you can glimpse through the vent grid, the all-modular cable system and the fan controller on the connectors panel are all typical of Seasonic.

These Corsair PSUs can be easily confused with Seasonic’s original ones in some views, but the back view is where every PSU looks very much like any other.

Circuit Design

As you can easily see, there’s not much difference between the two models in terms of their interior design (the top photo shows you the AX760 and the bottom one, the AX860). A couple of components vary in ratings and the higher-wattage model has a few additional capacitors.

We can also note that the hardware platform is similar to Seasonic’s KM3 series we tested recently except for the color which is black as is typical of Corsair products.

So, these Corsair PSUs are based on the updated Platinum-certified XP2 rather than on the XP platform.

The interior design is almost identical to Seasonic’s KM3 series, so there’s no need to delve into details once again.

Like Seasonic’s original products, the Corsair PSUs employ electrolytic capacitors from United Chemi-Con (also known as Nippon Chemi-Con).

Cables and Connectors

The all-modular AX760 and AX860 are equipped with the following connectors:

  • One connector for a mainboard power cable
  • Six connectors for CPU and PCIe power cables
  • Five connectors for peripheral power cables

Each model comes with the same selection of detachable cables:

  • One mainboard power cable with a 20+4-pin connector (61 cm)
  • Two CPU power cables with 4+4-pin connectors (65 cm)
  • Two graphics card cables with two 6+2-pin connectors on each (60+15 cm)
  • Two graphics card cables with one 6+2-pin connector on each (60 cm)
  • Two cables with four PATA power connectors on each (45+10+10+10 cm)
  • Two cables with four SATA power connectors on each (40+10+10+10 cm)
  • One cable with four SATA power connectors (55+10+10+10 cm)
  • Two adapters from a PATA power connector to a floppy-drive plug (10 cm)

The cable system of the AX760 and AX860 PSUs is comparable to that of Corsair’s Gold-certified PSUs based on Seasonic’s KM series. They offer more connectors but lack short cables with fewer SATA/PATA power connectors on each.

The power cables for graphics cards have one or two connectors, offering more flexibility. You can power up to three graphics cards with two power connectors each without any adapters. On the other hand, the PSUs may not be able to deliver that much power, which must be the reason why Seasonic only provided four 6+2-pin PCIe power connectors with its original 760W model.

Specifications

The AX760 and AX860 only differ in the load capacity of the +12V power rail. As expected from a modern PSU, they can deliver most of their power via the +12V rail whereas the load capacity of the +3.3V and +5V rails is rather low.

The PSUs comply with the 80 PLUS Platinum standard, which is the strictest efficiency standard applicable to consumer PSUs (there exist even harsher 80 PLUS Titanium requirements for server PSUs).

They come with a 7-year warranty just like their Seasonic counterparts.

UPS Compatibility

Working with our APC SmartUPS SC 620, the AX760 was stable at loads up to 410 watts when powered by the mains but could only switch to the UPS’s batteries at 300 watts or lower loads.

The AX860 was stable at 416 watts when powered by the mains but couldn’t switch to the UPS’s batteries even at 280 watts.

 
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