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Pros: Fully Modular - This really helps on air flow and work space. No reason to buy non-modular PSU anymore, when the price points have fallen so much.
Stable - Even at max power output, the PSU had not issues with support or heat. Temps never went above 50C. 12V rail remained stable with only 6% in fluctuations in voltage regulation, along with all other minor rails coming in at 5%.
Very Quiet - Even at full output, the unit was far quieter than the rest of the computer.
Warranty - 10 years, which is what a good quality PSU should have no days.
Zero RPM Mode - A must have on PSU. Fan only engaged when peak needs hits about 60%. Fan didn't need to kick on for most of the day.
Capacitors - Japanese!!! No lower-end capacitors from Taiwan or China, only the best on this model.
Compact Build Size - Size allows it to fit in min-ATX and up to full without an issue.
80 Plus Gold Certified - Should be for the price point.
POWER - Running a Kaby Lake CPU at 4.7Ghz, two GPU's, six drives, liquid cooling and 8 fans without an issue!!!
Plenty of Cable - Corsair was kind enough to include more cables than most anyone would ever need.
Cons: Single 12V rail - Most PSU above $100 now have two rails to use to spread the load demands.
Price - Unit is higher than similar models that have more than one 12V rail.
Cables - Very stiff and have trouble flexing. Can cause air flow issues.
Overall Review: The PSU is a decently priced unit that has an excellent design and build quality. Are there other units out there that do the same for cheaper? Yes, but not ones with a 10 year warranty. Unit had no issues in two weeks of use and benchmark testing.
Buy this unit if you want a PSU that will last the next 10 years+, keeping power stable and reducing the risk of damage your computer.
Pros: This is the perfect PSU for a mid tower build. Small in size, but sturdy in its weight.
Fully modular. I love minimalist builds that are clean. You can't get that without fully modular cabling.
80 plus certified. This is very solid efficiency and will save you money on your electric bill over the lifetime of the PSU.
I love the cabling. They're stiff, similar to EVGA and SilverStone. But not so stiff to not be route-able and manageable.
Cons: The only reason I'm not giving this 5 eggs is due to the length of the CPU power cable. There are a tons of great cases out there in the mid and full size that have bottom mount PSU housings. This PSU will not reach the CPU power, or ATX for that matter, connector in a full size case.
Overall Review: I have been running a Ryzen 1700x, 1080ti, 16GB DDR3, 3 SSD's, 3 7200 RPM HDD's for storage, and my disk drive and even under full load the PSU is silent and I've had no issues with gaming.
If you've come to Newegg, you already know you're looking for a solid PSU at your price point. But don't ever "cheap" out of a PSU. You get what you pay for. The PSU, while not as flashy as that GPU, CPU, or RAM, is the most important piece for any build. Especially longevity.
Do your research and get the best PSU in your price point. 650W is more than enough for today's modern CPU's and GPU's.
Please go check out reviews for the 850w version and a specific indepth review of the 650w version. These reviews take a deep dive into the components of the PSU, performance testing, thermal testing, and load testing of the PSU.
A PSU is all about longevity and stability. Corsair is one of the leaders in the market. Their longevity and history in the market space speaks to the reliability of their products.
Pros: The Corsair RM650x 2018 [V2] is the update to their RM line featuring 80+ gold level efficiency.
It is produced by long term OEM partner channel well [CWT]
It is fully modular, main cables are very solid construction wise and it features Corsair standard flat ribbon SATA cables which are stiff but can be made more pliable with hot air.
The mild update includes a bypass relay which supports the NTC thermistor, allowing for increased efficiency and enhanced inrush current protection.
Also included is a PIC micro-controller to control the fan's operation and allow it to run at lower RPM's further cutting noise.
All caps, primary and secondary are Japanese made by Nichicon and Nippon Chemi-con.
The fan is a 135MM rifle bearing, good but could be better with FDB.
The fan curve, it does not turn on until roughly 250 watts and remains flat at roughly 600 RPM until 600 watts are being drawn.
Designed to be bottom mounted I can't see the temperatures even without any airflow of being any concern.
Just note it's not temperature controlled but watt draw controlled.
If your system rarely sees power output up to 250 watts not only will you have zero noise but I'd suspect the fan will easily last the 10 year warranty.
Fit and finish is very nice in standard matte black, beige accent around the model logo.
10 year warranty and Corsair does a good job with RMA's if you needed to.
Intel C6/C7 Power State Support
Ripple is extremely low and voltage regulation is one of the better currently on the market.
1 x ATX CABLE 24-PIN (20+4)
1 x EPS/ATX12V CABLE 8-PIN (4+4)
4 x PCIe CABLE 8-PIN (6+2)
9 x SATA CABLE (3 SATA)
4 x PERIPHERAL CABLE (4-PIN)
1 x FLOPPY DRIVE ADAPTER (4-PIN)
Speaking of cables, to further line regulation the ATX, EPS and PCIe cables have caps under the shrink wrap, this adds some extra thickness which depending on your case might make for tighter fit through openings.
Voltage is flat, using a digital volt meter at the max watts my setup can output [236 watts] I get:
Over Voltage Protection
Under Voltage Protection
Over Power Protection
Over Temperature Protection
Short Circuit Protection
Inrush Current Protection
Cons: No fan test button, if your system does not draw up the threshold you won't know if you have a faulty fan.
I was able to by adding some external DC fans get the PSU fan to kick on briefly enough to physically see it working and it was dead silent so I am satisfied.
This is certainly not a deal breaker.
Overall Review: Price is competitive for the gold rating, power output and features.
Included velvet bag is overkill but nice and can be used to store something.
Included nylon pouch with velcro as Corsair has been doing for many years is handy for holding extra cables not being used.
Once you setup your system most likely you won't visit this pouch often.
I have a junk drawer with a couple of these pouches just in case.
Overall the V2 of the RM line has great fit and finish, excellent regulation, low ripple and zero noise until around 250W and even then the RPM's are so low you won't hear it.
The real competition within price and features would be the Seasonic focus and prime lines.
It's a tough choice, both are excellent units.
Seasonic PRIME is currently $10 more, has FDB hybrid fan and even better voltage regulation and MIR.
Focus is $10+ less
Purchase factor resides in current sales and/or MIR and personal preference [past history]
To date I've never had a faulty Corsair or Seasonic unit, many are 5+ years old and still rock solid.
Personally if I were to purchase today it would be a tough call but I'd go with 550W, I simply do not need that much power.
If Corsair offered a 450W unit I might be inclined to save a few $$ and go that route if it supplied enough cable options.
Empty connections are wasted connections but allow some future overhead.
CPU/GPU are becoming less power hungry as time goes on and the best efficiency is actually running around 50% load per any tech site if that matters to you.
Truth is between Gold, Platinum and Titanium you might see a few dollars power savings for an entire year so it's not something to overthink even running 24/7.
I hope you find my review useful and thanks to Newegg for the chance to review this item.
Pros: The 750x (like every Corsair PSU I have purchased) is packed very well, with a lot of extras. The unit itself is covered by a soft bag and surrounded by foam. I have a few of those bags now that I use for all sorts of things. The cables are packed in another bag that is also reusable.
The unit itself was noticeably smaller than the 1000w unit it was replacing, giving me extra space for cable management. The modular cables worked well, leaving me with a clean, open interior. There were plenty of cables for a standard setup: full tower with a single GPU, 4 HDDs, and a few fans. The installation was just like any other PSU. Nothing fancy, everything just fit into place.
The PC I’m running with this power supply isn’t anything fancy. The 1000w unit it had was overkill, and the 750w likely won’t ever see a full load. Everything powered up properly the first time. I have not had a single issue with it so far.
Cons: (Most of these negative points are directly related to the price of this unit. PSUs that “fix” these problems are more expensive, so in that light these might not be considered cons). I wouldn’t consider this PSU noisy, but it’s not quiet either. It uses a rifle bearing fan, which can’t quite match the FDB fans in more expensive units.
No fan test button.
It includes zip ties, which encourages people to use zip ties. Stop it. Well, unless you use the re-usable zip ties. I recommend Velcro instead.
Overall Review: It’s a good power supply for the price. If you need a basic unit that will get the job done with no frills, this is for you. It has a good warranty as well. It’s not perfect, but a 4 seems too low, so I gave it a 5.
Pros: So much to list here,
Your PSU is getting to you safely; tough foam and a nice velvet bag protect it from harm
Bag for your cables, zip ties, screws
Plenty of cables for a pretty beefy build
Enough PCI-e power cables to run SLI/Crossfire
Gold rated 750 watts
Nippon Chemi-Con Caps are top quality and what I look for before considering PSUs
Super silent cooling fan, almost never turns on for me
Small power switch and power input so you get the maximum amount of exhaust vents
Heavy thick-gauge power cord
Flush housing of the modular power connectors
Labels on the connectors are oriented for the PSU to be run with the fan facing down
Neutral coloring so it will look sharp with many different types builds
Matte Black finish is clean, doesn't attract finger prints
Looks classy in a windowed case
Corsair’s reputation and 10 year warranty. (Can't state how important this is in a Power Supply Manufacturer)
Cons: Only con I can think of with this PSU is the thick 24 pin connector was hard to route behind the Motherboard tray
Overall Review: I have owned a few Corsair Power Supplies and I have never been disappointed
They last forever which is why they can back them up with a 10 year warranty
Because of this fact they seem to have a very good resell value
ASUS Gryphon z97 mATX
Cooler Master MasterBox Lite 3.1 TG
Intel 4790k @ 4.7GHZ
Arctic Cooler A13
16 GB Samsung @ 2400 MHZ
Corsair RM 750x
2x 3TB Western Digital Green drives
128 Samsung 860 EVO
MSI GTX 1060 6gb
Pros: Out of the box this supply looks very good. It is fully modular, with a variety of connectors, including multiple PCI-E GPU connectors and two 8-Pin CPU power connectors. It appears to be well built all around. The internals look beefy and the capacitors I can see are all known good brands. The Cables are all of a good length and the larger bundles are sleeved, while the drive and accessory power cables are the ribbon style. The unit runs cool and quiet even when the fan is running. The warranty is an amazing 10 years. The unit is the size of a normal ATX supply from what I can see, so that 750 watts is packed into a nice small package. The modular cables allow you to only use what you need leading to very clean looking and easy to service builds. The pouch it is shipped with to keep the spare cables in is a bonus as well.
Cons: The heat-shrunk sections of the 24 pin cable are a bit bulky and hard to work with, I wish they were a bit smaller and more flexible. I have a similar issue with the double headed GPU power cables, I have a preference to have 1 cable per GPU power connection, so I find myself having to deal with the second connector adding bulk to my runs, and usually having to creatively tie it out of the way. I would prefer more cables over having one cable with multiple connectors for the components that are heavy loads. The only other thing I could ask for is maybe a switch to set the minimum fan speed to allow the fan to run all the time or to allow the 0% speed quiet mode.
Overall Review: I did not knock any eggs off my review for the cons section since a lot of that is my personal preference, and I am more or less offering them up as suggestions and notes for anyone building with this supply. I was very happy with this supply through all my testing and Corsair has grown more and more over me with the build quality of their supplies. I tested my power supply for 3 weeks on a dual socket server board with a modern GPU and it gave me no issues or hiccups whatsoever, even while running the machine at load for days on end to get benchmarks. I would recommend this supply to anyone building gaming systems, medium servers, or high end desktops. The build quality looking in from the outside looks very good, I see Nichicon and Nippon Chemi-Con capacitors everywhere I can see without opening the unit and, thus, voiding the warranty.
Pros: 10 year warranty
Neutral colors fit any build theme
Can connect 14 SATA powered devices
Finally ditched the floppy drive adapter cable
Large triangular mesh design matches that of new Corsair cases
0-RPM fan mode under moderate load means it will be 100% silent.
Essentially inaudible operation even with a 500+ watt load on the unit.
Cybenetics independent testing has confirmed the claimed 80+ Gold efficiency.
No excessively wasteful or extravagant packaging; potentially a con given the price.
Corsair branding/logo and RM850x will be right-side-up regardless of orientation of the PSU
Cons: Indefinite, and very strange, coil whine from my RX 6900 XT while using this PSU. See attached video and make sure to turn your volume all the way up. You can hear coil whine change when I use my mouse's scroll wheel and hit/hold down a key on my keyboard. Caused my 6900XT to overheat quickly. (more in overall review)
No Corsair badge or bag for extra cables.
User manual or quick start guide not included; must download.
Online user manual list of included cables do not match what is actually included/what is on the product page(s). (more in overall review)
Not capable of enabling/disabling 0-RPM fan mode like other manufacturers.
Thick cables with horrendously stiff heat shrink too close to connectors make cable management much more difficult than necessary. You have less than 1" of flexible wire from the CPU/GPU connectors.
Cumbersome 6+2-pin daisy-chain PCIe cables look terrible compared to competition. (see photos)
Only (2) 6+2-pin PCIe daisy-chain cables included.
(3) ATX/CPU 8-pin cables included; no motherboard I can find uses 3.
160mm depth is fairly standard these days, but not necessarily compact compared to 130mm & 140mm offerings from other manufacturers; Potentially a deal breaker for the ever increasing in popularity SFF PC build scene.
Overall Review: I'm fairly confident I received a faulty unit based on how my GPU acted while using this PSU. If not, then the daisy-chain PSU cables could be contributing to the problem.
The possibility that I've received a faulty unit aside, I would not recommend due to poor value and the combination of cables included.
The online manual states you'll be receiving (2) ATX/CPU 8-pin cables and (3) 6+2-pin PCIe cables. Corsair has changed this to (3) ATX and (2) PCIe daisy-chain cables. While this information is correctly listed on the product page, and packaging, it is still a problem. There's no motherboard I can currently find for sale, even the $1,000 ASUS ROG Crosshair X670E Extreme, that have triple ATX power plugs; making the 3rd unnecessary e-waste.
Going from (3) separate 8-pin PCIe cables to only (2) daisy-chain 6+2 cables could present problems pending your GPU configuration. I reached out to Corsair tech support regarding the daisy-chain cables and supplying up to 600W while using an ATX 3.0 adapter, and this is the response I received:
"Being rated for 150 watts does not necessarily mean being capped at 150 watts. Our 12v power adapter cables are manufactured with hefty cables allowing them to safely handle more throughput, enabling them to handle 600 watts with only 2 PCIe connectors."
Corsair is stating it is safe, but from what I have experienced personally, and read numerous times on various forums/sites, GPUs are best off being connected to individual cables per power connector to ensure proper functionality. This is especially true for power hungry GPUs like RTX 3080, and above, as well as AMD Radeon RX 6900/6950 XT. These cards can/will have large power draw spikes. Utilizing daisy-chain cables is well documented at this point to be a cause of instability.
Corsair is obviously readying PSU's for RTX 4090's that will include 12-pin 12VHPWR adapters that use (3 or 4) 8-pin PCIe cables to supply 450W-600W. Corsair says this is OK. I don't have a GPU that requires one of these adpaters to test with, so I can only go off of my experience with my 6900 XT; which was not optimal.
While I was able to stress the PSU with ~500W load from my 5900X, ~170W, and PowerColor Red Devil RX 6900 XT, ~330W, without any stability issues, I did have problems; none of which occur with my existing PSU.
Constant, albeit, faint coil whine was present as soon as the PC powered up; even at idle More strangely was how the coil whine would change pitch by input from my mouse/keyboard. While typing the noise was most noticeable when holding a key down. Click/drag a window would cause it to change. The most noticeable, and annoying, was scrolling up/down a webpage with the scroll wheel on my mouse. I have attached a video of this issue.
Comparatively, with my existing PSU, I would only encounter coil whine while at FPS generally in excess of 150; like loading screens or synthetic benchmarks. The other issue I experienced was overheating of my GPU. Running my 6900 XT to the brink, with OC BIOS enabled and +15% power limit, pushed the GPU hotspot temp to a blistering 107C in <2 min, and then stayed pegged/throttling at 105C. After reconnecting my PSU, it became clear that the speed in which the GPU hit, and maintained, those temps was due to the PSU. Over 15 min with the existing unit, the Hotspot slowly crept from 90 and eventually held 101C. The GPU PPT wattage (total gpu package power) topped at 314W out of the 324W available. With the Corsair it pegged at 323W and peaked 330W. I was viewing power draw in MSI Kombustor/HWInfo64. Whatever the Corsair PSU was doing caused the higher temps/power draw which netted ~100 MHz lower clock speed in MSI Kombustor.
Something strange is happening with power delivery to the GPU. I don't know if there is a problem with the unit I received, or if the daisy-chain cables are contributing to the issues I am experiencing.
Considering the unnecessarily thick/stiff cables, daisy-chain PCIe cables, extra CPU cable, coil whine and the peculiar behavior when stressing my GPU...I will say this PSU is a bit of a disappointment compared to my past experiences with Corsair.
Newegg sent me a RM1000x ~6 years ago to review. While I had similar complaints regarding stiff cables then, the PSU performed flawlessly even with a larger load on it; a pair of overclocked R9 290's and a 4770k.
Pros: 10 year warranty
Fan doesnt need to spin except when Im playing a game. This is a great feature, except the fan is so quiet anyway that you cant hear it even when it is on.
Generous number of connectors for this wattage level
Tested, proven efficiency
Cons: No storage bag for unused cables - Every other corsair PSU in this class ive seen has come with a storage bag. This was a disappointing omission.
Standard corsair design has flat ribbon style cables for the drive connectors and then round mesh sleeved cables for the rest. It would be nice if they were consistent
Overall Review: Another very well constructed PSU from Corsair. I have owned several and they all last forever. I took overall system draw readings from my old PSU (Coirsair CX 430) prior to replacing it with this PSU. With the new PSU, my system draws 15 watts less under full load. All voltages are spot on. If youre building a system dont ruin it be going cheap on the power supply. A good PSU like this one from Corsair will give you years of reliable operation and might even save you money in the long run over a cheap inefficient unit. In order to be this efficient, the PSU has to be built with better quality components too, so its a win/win.
If you're looking for a reliable, efficient PSU to power your gaming or productivity system, you can't go wrong with this PSU