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CoolMax > 
Item#: 9SIA4CP1ER0778

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

The CoolMax semi-modular power supply CU-700B lets you select the cables you need for a clean and easy installation while powering your system at a healthy voltage. All output cables with nylon sleeving make management easier and reduce wind resistance to aid airflow. Three +12V rails ensure a balanced output even under the heaviest loads. This power supply provides over voltage protection and short circuit protection.

  • newegg ATX12V v2.2 Compatible Compatible with the ATX12V v2.2 standard, the CoolMax CU-700B power supply provides maximum power stability to drive the processors as well as other system components.
  • newegg 700W Maximum Power The CoolMax CU-700B power supply provides a maximum output of 700W to deliver safe, reliable power for high-end computer systems. Three industry-leading independent +12v rails are provided for more stability and safety.
  • newegg Semi-Modular Cable Design The semi-modular cable design allows use of only the cables you need, resulting in improved internal airflow and reduced system clutter.
  • newegg Efficient Cooling The CoolMax CU-700B is assembled with a 120mm silent fan to increase overall airflow in the power supply enclosure and helps remove heat from the chassis simultaneously.

Learn more about the CoolMax CU-700B

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years
  • Read full details

Customer Reviews of the CoolMax CU-700B

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  • Dylan W.
  • 2/1/2016 1:56:42 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsBad PSU

Pros: Lasts about 3 months.

Cons: Unstable and fries from just being a little warm.

Other Thoughts: It fried after having it for about 3-4 months. I got a replacement from the company and that one fried after 3-4 months. I've ordered a new one from Corsair this time and I have yet to get a single response after messaging about it frying the second time. Lesson learned - Cheap is completely worthless to buy. I wish I had more money at the time, even an extra $20 would've gotten me something way more stable.

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  • Anonymous
  • 4/12/2015 9:02:40 AM
  • Ownership: more than 1 year

5 out of 5 eggs5 years later and still going strong.

Pros: Bought this back in 2010 and its been in two different cases, through 3 different builds from AMD to Intel and back to AMD. Still running like a champ. I've run 4 burners and 4 hard drives almost 24/7 the whole time plus video cards though I've never crossfired or sli with it. It's never failed to fire right up.

Cons: The cable length has been an issue in a full size case but was easily fixed with a solder iron and old psu to steal wire from.

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  • Chad H.
  • 2/4/2015 2:52:19 PM
  • Ownership: more than 1 year

3 out of 5 eggs

Pros: It was a great power supply to start out my new gaming rig. It lasted for a good length of time.

Cons: The cords are short even for my mid-tower rig.
After a while my computer got really loud I suspect it was the fan inside the power supply unit that made all the ruckus.

Occasionally, I would smell wierd smells which seem to be strongest from near the PSU.

When this PSU died on me 2 days ago It emitted some sparks and pop sounds.

Other Thoughts: I believe I built my gaming rig back in May 2012. But this PSU died on me on February 2nd, 2015. So this has decent longevity.

It was a good starter PSU. but now I'm seeking a new PSU to try and power on my system.

I can only hope and pray that the PSU did not take out any additional hardware like my motherboard, graphics card, cpu HDD, DVDROM or RAM with it.

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  • Nicholas G.
  • 12/28/2014 7:29:06 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsDoes not put out the power that is advertised.

Pros: -Put out some power
-Didn't explode (barely)

Cons: Could barely power a GTX 760, Couldn't power a GTX 970

Other Thoughts: I originally bought this when I got my GTX 760 and a new case, so I could have some decent cable management. I had never messed around with overclocking before but I heard the 760 was decent for it. When I tried it my entire PC would restart on the slightest overclock. I figured it was the card or my error so I left it alone. I decided to upgrade my GPU last week to a GTX 970. I hooked it up and installed the drivers. When I went to play a game my PC just restarted. I double checked my connections, made sure my BIOS was up to date, and tried multiple games. all resulted in the same result. The minimum power supply requirement is 500w for the 970 so I thought I was fine. I RMA'd the card thinking maybe it was faulty and the replacement I received did the same thing. So I went out a bought a name brand 750w PSU and now it works perfectly. This PSU does not supply anywhere near 700w. I would not recommend it unless you plan on upgrading your PSU again in a couple months, or if you're running a less power consuming system. Also let it be said that im not running anything crazy on my system. Just a CPU, GPU, one HDD and some fans and lights. Nothing too power consuming.

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  • vincent R.
  • 7/30/2014 6:19:08 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsbeen working for about 6 months now

Pros: this power supply works relay well for 1 amd gfx and amd processor i don't have a second one to try it with so i can only say with what i have but there both over clocked theres seems to be no problem yet nothing sounding wrong or loud just quite.

Cons: none

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  • Daniel M.
  • 4/28/2014 7:02:44 PM
  • Ownership: 1 month to 1 year

1 out of 5 eggsOne of the worst PSUs ever.

Pros: Its cheap and semi modular. The fan was quiet and all the connections fit well.

Cons: This PSU blew after just 2 months of use and took my sound card with it. No power surge or anything out of the ordinary. Would not recommend.

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  • Michael P.
  • 8/29/2013 7:26:34 AM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsFantastic Power Supply.

Pros: *Power Supply has lasted so long that I finally retired it today, owned this thing for what must of been 4-5+ years already.
*Silent, under any load that I could throw at it.
*Plenty of connections, cable length is OK for full sized towers.
*Powers my various video cards up-to a GTX 680.

Cons: One day this Power Supply will be retired and that is the con. Goodnight sweet prince.

Other Thoughts: The reason I had to retire it is due to my new video card having a 8-pin connector and this power supply not coming with one. I lost my modular PCI-E cable and had to have 2 molex connectors attached to a PCI-E adapter and another 2 molex adapters making yet another PCI-E adapter to plug in one 8-PIN adapter which then plugged into my video card.

I didn't feel good about having too many adapters connected for safety reasons which is not the fault of the power supply itself, I don't trust having so many adapters daisy chained even though everything powered up and gamed on just fine. I would recommend and buy Coolmax power supplies again in the future.

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  • Andrew G.
  • 4/9/2013 6:38:11 PM
  • Ownership: more than 1 year

5 out of 5 eggsGreat

Pros: Lasted 5 years problem free.

Cons: Finally started being a little weird 5 years in. Gave warnings before it died.

Other Thoughts: Didn't fry my pc going out.

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5 out of 5 eggsWorks Well

Pros: Runs cool, Quiet

Cons: None

Other Thoughts: Used in a moderate system build (Athlon x2 250, single Nvidia GeForce card) for over 3yrs, no problems. Maybe others are overloading thiers?

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  • Michael S.
  • 8/26/2012 5:26:05 AM
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsRan great for 3+ years

Pros: Quiet, easy to clean, enough cords and cords are long enough. 3 years of working

Cons: Died with a very loud bang pop and sparks. Took out my mobo, ram, and harddrive. CoolMax very quickly sent out a replacement. The replacement seems to lack the power and causes resets.
ASUS Sabertooth 990fx am3+
AMD FX-8150 8 core
Samsung 64gb SSD
Western Digital 2tb
Gskill sniper series 8gb (2x4gb)
Radeon 5850HD

Other Thoughts: It lasted for 2 and a half years with my original setup
ASUS m4a79xtd mobo
AMD Phenom II x4 955 Black Edition
GSKILL Ripjaws 8gb (4x2gb)
Radeon HD 5850
I upgraded and it died after six months. After getting all my parts warrenty replaced the system has random resets. I replaced the video card with a less powerful card. (one that doesn't need the 2 6pins) The computer now runs without resets. I give it 3 eggs for the 3 years it worked but I would still suggest getting something a bit more powerful for components build in 2012 on.

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Item#: 9SIA4CP1ER0778
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