Corsair CP-9020178-UK RM650x 80 PLUS Gold 650 W Fully Modular ATX Power Supply - Black

Product Information

The following graph shows the RM650x's average efficiency throughout its operating range with an ambient temperature between 28 °C and 30 °C. From individually sleeved cables in a variety of color combinations to 12-pin micro-fit GPU cables and 12VO motherboard cables, complete your build your way. will only consume around 10-20 watts idle, likewise for the GPU with remaining system eating another 10-20 watts.

This was not easy/cheap to achieve, so Corsair couldn't just replace the current RMx in the market with a new, more expensive version without tangible differences.

The significant differences with the slightly more expensive RM650x come down to the cooling fan and the capacitors.

We would like to see higher than 70% efficiency with 20W load, though the PSU performs well in the other three tests. The latter is a Taiwanese company, with factories in China, and provides products to several high-end brands including two well-known ones.PSU calculator recommends 590w (I overcompensated for everything, including some crazy OC's), so not fussed about extra 100w (unless I should be? Just off the top of my head Flextronics, CWT and SuperFlower are all capable of making units that are at least equal to high end Seasonic quality. We strongly encourage you to have a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to understand better the components we're about to discuss. The following chart may be the most interesting to many of you because it depicts the RM650x's performance-per-dollar score. At low and medium loads the cooling fan switches off entirely for near-silent operation, but once the action picks up, the fan activates, ensuring critical component temps stay in check.

The caps in the cables in other models are only there to appease reviewers (like Aris) that compare ripple from one model to the next within mV of each other. Other than that I've had an 80 Plus Platinum Seasonic ( 660XP2 ) for a couple of years and their Platinum line has been out since at least 2011. Since moving from being a reviewer to someone working in the industry, I've learned that 75% of what is said in reviews, including a lot of the stuff I have said in reviews, is total B.

Its efficiency under super-light loads is high, and it also supports Windows 10's new Modern Standby mode, which allows the PC to boot reliably within a five seconds period. The first chart below illustrates the cooling fan's speed (in RPM), and the delta between input and output temperature. Nonetheless, the RM650 scores higher efficiency under super-light loads and it also supports Windows 10's Modern Standby mode.