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Item#: 9SIA0ZX2C30033

COOLMAX CX-550B 550W ATX12V Power Supply

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Learn more about the CoolMax CX-550B

Quick Info

Warranty

  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year


Customer Reviews of the CoolMax CX-550B

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  • Joshua K.
  • 3/2/2013 12:47:21 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsDead after 3 months

Pros: Quiet with lots of power connectors.

Cons: Dead in 3 months. I am going to RMA this to CoolMax and will update this post after I get my replacement.

Other Thoughts: I will be disapointed if this takes a long time to RMA.

2 out of 2 people found this review helpful. Did you? Yes No

  • Anonymous
  • 6/1/2010 11:26:45 AM
  • Tech Level: High
  • Ownership: more than 1 year

2 out of 5 eggsCoolmax 550W PS

Pros: Good Price, OK performance. Seemed to hold the rails well and I have owned a couple dozen of these units in that I have >30 racks of equipment. It's an OK basic supply I've built many ATX style machines on.

Cons: Longevity. A couple years back, these seemed more durable than current production units. These days, consider yourself lucky if you get 18 months out of it on even a mediocre system load.

Other Thoughts: Unfortunately, this model went from a good value to earning a permanent spot on my (bleep) list. If you need a budget 550watt ATX style (pretty much the smallest PS I'd consider buying these days for any machine) a BP550 with 3 12V rails and a 3 year warrenty from (someone else) would be the way to go at this price point.

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  • David R.
  • 11/22/2009 3:11:42 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

1 out of 5 eggsgarbage

Pros: worked well when it worked.

Cons: died within 2 years. garbage. do not buy

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

  • Laura W.
  • 11/13/2009 7:57:16 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsAvoid

Pros: It works, when it works.

Cons: As many have reviewed here this supply dies often. I purchased mine 12/13/08 and I just submitted a replacement request because the unit failed 2 days ago.

I ran my computer 24/7 and gamed often on it so it got it's use.

Other Thoughts: I would recommend you go with another model at minimum, maybe even consider a different brand.

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

  • Harold B.
  • 11/5/2009 8:19:25 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

1 out of 5 eggsPower Supply Cable Length

Pros: I have none.

Cons: I had this power supply twice, average failure once per year.

Other Thoughts: Reordered same power supply, model and part number for the third time; but now it comes with shorter connecting cables. They are not long enough to reach the system board connectors in my Antec P180 case.

1 out of 2 people found this review helpful. Did you? Yes No

  • Jase T.
  • 3/9/2009 7:36:23 PM
  • Tech Level: High
  • Ownership: more than 1 year

4 out of 5 eggsWas a work horse

Pros: Price..When I bought it there was a rebate and so it was only $35 bux. Has lasted for 15 months under extreme circumstances. I run my Intel E6750 at 3.2 Ghz daily and at 3.7Ghz when gaming with an OC'd 9600GT. I also have 4 case fans and every perpheral known to man. I have spent many long hours of heated, literally, gaming. Very, very quiet.

At some point in the last 4 months,or maybe more, a cable tie that used the PSU fan grate shifted and blocked the fan. It was really quiet! lol. And still kept ticking fanless. I finally got FEAR 2 and an hour into it the PSU fuse popped. Rightfully so under that much heat. But I still give this thing credit for running for so long without a fan.

Cons: 1st day of ownership the PC would randomly not start and sometimes shut off when bumped. Finally noticed a smell from the PSU. The power chord had one pin that was arcing with a poor connection. Replaced chord with one I laying around and all was good.

Pain in the NECK fuse. Ripped the thing apart and the fuse is soldered to the board. Desoldered it and headed out tomorrow to pick up a 250V 6A replacement. Will have to resolder and hope through all this no other connections came loose (lot's of pulling tugging and general ackwardness to get at the fuse).

Other Thoughts: If it still works when the new fuse is put in, I'll be amazed. Usually another component is taken out somewhere due to poor engineering.

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

  • Michele B.
  • 12/5/2008 6:21:39 AM
  • Tech Level: Average
  • Ownership: more than 1 year

5 out of 5 eggsIt dies gracefully

Pros: This power supply dies gracefully -- that is, without making a burnt offering out of the MB, CPU, video processor or peripherals (SATA & EIDE). After having countless no-name power supplies fry the devices they feed I was delighted to see this one leave everything unscathed.

Cons: No one likes to have a component die. This was not in a particularly difficult environment: Intel D101GGC MD, 2.3Ghz Pentium D, XFX dual screen adapter, Comtrol octaport adapter, two SATA HD's, removable EIDE HD, floppy & DVD/CD reader. The case is a 3 fan rackmount, 3 RU high so there was lots of cooling. When it died power for the 12V fans and low current sensing power for the on/off switch was still there. It seems like one leg of the 5V supply may have died but I didn't check with a 'scope or meter.

Other Thoughts: I ordered another one.

Did you find this review helpful? Yes No

  • Anonymous
  • 11/17/2008 12:14:02 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year

2 out of 5 eggsPar for the course

Pros: Nice and quiet.

Cons: Installed 3/07, died 11/08. Won't buy Coolmax again.

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  • Matthew U.
  • 9/29/2008 3:24:41 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year

3 out of 5 eggsIrony, maybe.

Pros: The power supply still works today.

Cons: The silent technology, if you will, stopped working about 3 months after purchase. The unit started producing a friction like noise that I could not get to go away. This progressively got worse until the fan stopped working. Finding a replacement for the slim mm fan is difficult.

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  • Anonymous
  • 9/15/2008 7:02:21 AM
  • Tech Level: Average
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsworked OK for 1.5 years, then died

Pros: Worked fine for 1.5 years, quiet fan.

Cons: Randomly died after 1.5 years of light use.

Other Thoughts: Although the PS worked for 1.5 years, I had hoped for a longer service life, and will probably try another brand next time.

Did you find this review helpful? Yes No

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Item#: 9SIA0ZX2C30033
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