CORSAIR RMx Series, RM750x, 750 Watt, 80+ Gold Certified, Fully Modular Power Supply

First, a quick go through the obvious advantages of this unit, which I knew before getting it (and you probably know too, so skip this if you've really gone over the specs):1. The modular connectors make assembling your build or modifying it a breeze. You can easily disconnect any and all cables to take whichever part out of your system (in particular, the ATX 24-pin cable and 4-pin CPU cable are only modular in high-end products, and they usually make getting at your motherboard a pain after the initial installation; not here).2. This PSU's fan is practically silent; it doesn't even kick-in below 300W, and even at full load it's barely audible (Corsair says 22dB, and I can easily believe that).3. It's power-efficiency is nearly the best you can get (more than 87% at all loads on a 220V input, or 85% on 110V input).4. Corsair offers a 10 years guarantee, which is great, but then again I never had an issue with a PSU that wasn't a manufacturing defect (so, my experience is that a 1 month warranty is about all you really need). Nevertheless, peace of mind is always appreciated.What I didn't know when I ordered this PSU is how premium its packaging and accessories feel. Everything from the solid box, to the custom cable pouch and a carrying sleeve for the PSU itself, makes unboxing it is a really nice experience. There's not much use in that after you've assembled your PC, except perhaps if you for some reason carry a PSU with you (technicians, or some competitive gamers?), but it will sure add reselling value down the line. Regardless, it was a really nice surprise for its own sake.The only two things I'd like to point out about this unit which aren't raving recommendations are:(i) Its dimensions (18x15x8.6 cm) will make it difficult to work with in a mini ITX build (make sure that your case can accommodate it if you use that form factor), although modular cabling will help somewhat. If you build a standard ATX system, then that's not an issue.(ii) A minor peeve is that all cables are colored black. Undoubtedly some prefer it that way (it makes the 24-pin cable more pleasing to the eye in open/glass-door builds), but I'd have liked some color-coding (maybe on the bottom of the connector, where it wouldn't be visible once assembled) to help me find pin 16 (the one you need to short in order to test the PSU or turn it on when disconnected from a motherboard -- e.g., if you need to bleed a watercooling loop).

Kicks ass. Works as intended. Quality cabling. Fully modular. With Lian Li extension bracket can be crammed into Mini ITX case. Dead quiet. In fact, when idle or under light load fan does not even spin. Will power AMD R9 Fury or Nvidia 1080 cards. Pretty much just kicks ass. What more do you need in a single GPU setup?

Quick Review: I really like the silent mode with the fan off - so much quieter. This is the only power supply I will ever purchase in the future. The fully modular cables are expertly done - makes for a very clean and neat appearance after the computer is built.I received this power supply just in time for my current computer build. This is my third build with a fully modular power supply in the past six months. Previously I used hybrid modular power supplies where the two main cables for the motherboard are hardwired, but the rest of the cables are modular which you can plug in cables as needed. The hybrid approach is functionally about the same as a fully modular power. You will always need the main CPU power cable and the main motherboard cable. And then there are the original style power supplies that have all the possible cables hardwired inside the power supply. Those power supply cables are somewhat challenging to route and hide the excess wiring. Fully modular power supplies allow you to have a much better cosmetic appearance or at least a consistent appearance.In this computer assembly I am building, I am using this Corsair power supply, Corsair Hydro Series H80i v2 Extreme Performance Liquid CPU Cooler , Black and Corsair Dominator Platinum 8GB (2x4GB) DDR3 2133 MHz (PC3 17000) Desktop Memory (CMD8GX3M2B2133C9). I have used Corsair computer components extensively since 2009 and I've always been pleased with the results. I have the peace of mind that the system components will meet specifications and be reliable when there is Corsair inside. This Cosair 750 Watt power supply is more than I need for this system I'm building, but it is also nice to know that if I add more video cards, the power is there to handle it. There is a pigtail connector on the end of each PCI video cable that looks like it may be intended for an adjacent video card. I am starting off with one GeForce GTX 970 4GB FTW Gaming ACX 2.0 Video Graphics Card. In addition, I am using an ASRock LGA 1150 Extreme6 Motherboard, Intel Core i7-4790K Processor and 512 GB Samsung 950 Pro NVMe SSD module.I am attaching several photos relating to the power supply cable management. First I like to do a mockup of the cable arrangement to make sure I know where all the cables are going – in particular the 8 pin cable next to the CPU. I connect that cable first and route it out the corner to the backside of the computer case. If you wait to connect it after installing the motherboard, you’ll find it’s next to impossible to route it to the backside of the computer case. Also, I like to install the main motherboard cable before installing it into the case. It takes quite a lot of force to insert this cable to the motherboard connector and I don’t like to flex the motherboard with excessive force. I’m using a full ATX motherboard in this instance, so it isn’t quite as much concern. But if you are using a short version motherboard, there is no localized support for the motherboard where the main connector goes. So if you install this main connector before putting the motherboard inside the case, then you don’t run into the problem of flexing the motherboard. It is risky to flex rigid printed circuit boards.They put a sticky warning label over the power input connector to call your attention to the fact the fan does not rotate all the time – only if the power supply gets to a certain temperature from a heavy load. So they are saying not to panic if the fan isn’t rotating – that’s the way it is designed. My video card is the same way – fans only rotate under heavy loads or temperature above a predetermined level. I don’t like noisy fans, so this is a really nice feature for me.Otherwise, the cabling is fairly straightforward. Pick and choose your cables according to the configuration of your system and then route them on the backside of the case as much as is practical. If you put some thought into it and make a few trial and error changes, you can get a very neat and organized system appearance. And that is one of the main purposes of a fully modular power supply. I have used Corsair products quite a lot in the past seven or eight years and all their components are still working. I think you will be quite pleased with any of Corsair’s products.

After using various other brands of PSU's in the past I started using Corsair and never went back. I absolutely love the corsair PSU's. They work amazing, they are made of 100% japanese capacitors and have an amazing warranty. I love the fact that the fan stays off unless under load and is generating heat. Keeps the computer very quiet. Absolutely love a modular PSU. Once you go modular and see how clean the build is you'll never go back.You know that Corsair cares about their PSU's as each one is shipped in a velvet bag and all the modular cables come in a nice nylon bag with a velcro flap.Would recommend any of the Corsair PSU's in a heartbeat.