Skip to: | - A great place to buy computers, computer parts, electronics, software, accessories, and DVDs online. With great prices, fast shipping, and top-rated customer service - once you know, you Newegg.

If you are reading this message, Please click this link to reload this page.(Do not use your browser's "Refresh" button). Please email us if you're running the latest version of your browser and you still see this message. - Computer Parts, Laptops, Electronics, HDTVs, Digital Cameras and More!

Sign up today for a 30-day free trial of Newegg Premier
  • Shipping Destination: United States
  • Wish List
  • Feedback
  • Help
Search all
Home > 
Computer Hardware > 
Power Supplies > 
Power Supplies > 
CoolMax > 
Item#: N82E16817159082

COOLMAX NW-650B 650W ATX12V v2.2 SLI Ready / CrossFire Ready and Compatible with Core i3/i5/i7 Power Supply

  • ATX12V v2.2
  • 115 / 230 V
  • Smart cable management
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
  • Pin It
  • Email this page
ICON Loading...

A great blend of performance and features, the COOLMAX NW-650B power supply offers an ideal choice for discerning users wanting reliable output at great price. Dual PCI-E connectors gear it up for multiple graphics.  The cooling system boasts a fan size of 120mm with automatic settings so you no longer have to worry about high or low settings or if your fan is spinning too slow or too fast. The NW-650B will adjust itself according to the necessary heat dissipation level.

  • newegg 650W Output The COOLMAX NW-650B provides 650W of reliable output for your entire system. Three 12V rails with 540W max. combined output juice up demanding CPU and multiple graphics cards.
  • newegg NVIDIA SLI Ready & AMD CrossFireX Ready This power supply unit is AMD CrossFireX and NVIDIA SLI Ready and comes with 6-Pin PCI-E connectors enabling you to build a high performance multi-GPU gaming system.
  • newegg Reliable Protection Over/Under voltage protection safeguards your system components.
  • newegg Excellent Cooling 120mm speed adjustable fan achieves efficient cooling with quiet acoustics.

Learn more about the CoolMax NW-650B




ATX12V v2.2
Maximum Power
120mm cooling fan
Main Connector
+12V Rails
PCI-Express Connector
2 x 6-Pin
SATA Power Connector
SLI Ready
Haswell Support
CrossFire Ready
Over Voltage Protection
Overload Protection
Input Voltage
115 / 230 V
Input Frequency Range
50/60 Hz
Input Current
10 - 5.5A
+3.3V@25A, +5V@25A, +12V1@16A, +12V2@16A, +12V3@16A, -12V@0.5A, +5VSB@2.5A
5.60" x 5.90" x 3.30"
3.96 lbs.


1 x Main connector (20+4Pin)
1 x 12V(4/8Pin)
4 x Peripheral
4 x SATA
1 x Floppy
2 x PCI-E
120mm fan designed for long life, durability, and fastest cooling time
Automatic fan setting for best heat dissipation
Smart cable management
Over/Under voltage protection



Dimensions & Weight

5.50" x 6.00" x 3.50"

Manufacturer Warranty

5 years limited
5 years limited

Quick Info


  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years

Customer Reviews of the CoolMax NW-650B

Do you own this product? Write a Review

ICON Loading...

Filter Results

  • Steve M.
  • 8/17/2014 2:27:21 PM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsBest Ever

Pros: Bought this Power Supply 11/19/2011 for a new system build.. This thing has been Rock Solid every since. It was bought for a Mid Range Gaming system that has been threw the torture test..

Cons: Not a dang thing.

Other Thoughts: Just wish I would of bought 3-4 of them, I have gone threw more expensive power supplies on other systems that haven't lasted as long as this one has..

Did you find this review helpful? Yes No

  • William P.
  • 4/4/2014 11:51:42 AM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsNope!

Pros: Price

Cons: Died on week 3 and unable to resuscitate, thankfully i still had my old Roswell 550 on hand. Going to return just have had the opportunity to yet.

Did you find this review helpful? Yes No

  • Jacob W.
  • 1/4/2014 8:24:55 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

4 out of 5 eggs

Pros: Runs a GTX 560Ti and a Phenom II x4 945 flawlessly.

Cons: First one had an audible whine and died after about 6 months. Pretty easy RMA though. New one works like a champ.

Did you find this review helpful? Yes No

  • Vi C.
  • 1/10/2013 1:21:35 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsBad Performance

Pros: Works great Powered my powerhouse Core i7 1366 Socket 950 rig fine. Until I started playing a game and using my computer heavily.

Cons: Horrible on high load. PSU got very hot to touch in the back and started sputtering whine noises. Felt like I was reaching my power limit but I thought this was a 650 Watt PSU should of been enough. Was wrong, maybe it isn't. For a low- mid grade system this would of been fine. Forget high performance out of this PSU.

Other Thoughts: Bought a Cooler Master Silent Pro M2 RS720 instead. Hopefully it'll handle the powerhouse of Overclocked Core i7 CPUs.

0 out of 1 people found this review helpful. Did you? Yes No

  • Thomas D.
  • 10/19/2012 9:07:36 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsDied in under a week

Pros: It has really nice cabling and connectors along with a good price.

Cons: I was sitting at my desk and heard a loud "bang" combined with my computer turning off and smoke. I think a capacitor blew.

Other Thoughts: I was really happy with this supply when I installed it. I was less happy when it died a week later.

Did you find this review helpful? Yes No

  • Jeremy K.
  • 4/17/2012 7:12:34 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsEasy to install / does its job

Pros: Product is exactly what I needed and easy to install. Fan is silent.

Cons: none so far, it just works

Other Thoughts: Bought this to power my GeForce GTX 560 Ti.

Did you find this review helpful? Yes No

  • Tyson W.
  • 4/9/2012 9:38:10 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year

2 out of 5 eggsits ok

Pros: Decent price. Details and overview painted a pretty picture

Cons: You get what you pay for. I expected it however to atleast run ONE gpu without any hitches seeing as in the description its rated for Xfire and SLI. So who likes being lied too? I dont. Its straining under a very low load and Im pretty upset about choosing to spend less. Wont happen again especially on a "Coolmax". I dont see how lying about a product is ok.

0 out of 1 people found this review helpful. Did you? Yes No

  • mitchell d.
  • 4/5/2012 12:04:49 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year

5 out of 5 eggsBang for your buck

Pros: Simply awesome. A good gaming system will only pull ~500 watts from the wall. Mine has been pulling 500 consistently for 5 years! Also, newegg is such a great site, fast shipping and great reliability.

Cons: NONE

Did you find this review helpful? Yes No

  • Nicholas R.
  • 1/31/2012 9:22:36 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year

1 out of 5 eggsNever again you say? ME TOO

Pros: Got two years out of this unit... ran 3 hard drives 1 optical 125watt cpu and twin nvidia 9600 GSO's (not in SLI) on a gigabyte MB. but those graphics cards have low power requirements... Yesterday I dropped them both for a single 6790 radeon and ...

Cons: Today it died.. almost exactly two years after purchase. It went out in a blaze of glory... the sparks lit my entire room for about 4 seconds. blew past the surge protector my PC was plugged into and tripped the circuit breaker in the garage shutting down power to about a quarter of my home. Reading up on coolmax PSU's it would seam a lot of people are having issues with many of their PSU models. Coolmax seems to replace faulty items quickly and their is a long lasting warranty... but so many shouldn't need to use that warranty if they didn't make cheap stuff.

Other Thoughts: I recently added in my first high end graphics card. This marked the death of this PSU... but if it is crossfire certified and I only added in one graphics card why did this PS literally explode on me? I was having problems before the card... got up to 5 hard drives a month ago and was having issues turning on the PC... unplugged two of them and it seamed to go away. In the middle of a GPU stress test snap crackle and pop this thing lit up!
Hard drives use about 30 watts when they are spinning and at no point are all of them spinning at once... most of the time all but the C: are asleep. regardless when this PSU blew up the extra hard drives were not even plugged in... it was the Graphics card alone... a single 6790 crippled this PSU.

If any of my components are damaged... Newegg is not the only place I will be warning others of how cheaply built coolmax PSU's are.

1 out of 3 people found this review helpful. Did you? Yes No

  • Steven P.
  • 1/3/2012 12:38:00 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsNever Again

Pros: none

Cons: I used 2 of these in builds for clients. BOTH of them have fried motherboards and other hardware as well. I will never buy a CoolMax power supply again.

Other Thoughts: Don't waste your money on this. just go look at something decent like Antec or Thermaltake. Putting your money into a PSU that will last will make you much happier. Trust me.

1 out of 1 people found this review helpful. Did you? Yes No

ICON Loading...

Send It As A Gift!

gift services details
Are you an E-Blast Insider? Subscribe Newegg e-Blast
Shop without retyping payment details. Secure shopping made faster.
Check out with PayPal.

Home > 
Computer Hardware > 
Power Supplies > 
Power Supplies > 
CoolMax > 
Item#: N82E16817159082
Related Products
Today’s premium computer parts require quality power, but ...
The Rosewill FORTRESS series is a premium 80 ...
Okay, you've got your tower, you've got your ...
Power packed to the core, the 88PLUS ready ...
Shop by Region: United States | Canada | China
VeriSign Click for the BBB Business Review of this Computers - Supplies & Parts in Whittier CAThis site protected by Trustwave's Trusted Commerce program Inc500
Policy & Agreement | Privacy Policy  © 2000-2014 Newegg Inc.  All rights reserved.
If the Adobe Reader does not appear when you click on a link for a PDF file, you can download Adobe Reader from the Adobe web site. nassau