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Cool Master Power Supply

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September 19, 2012 7:23:41 PM

Hi
What is a good power supply for the
Cooler Master HAF X - Full Tower Computer Case with USB 3.0 ?
Would Thes: Cooler Master eXtreme Power Plus 500w Power Supply (RS500-PCARD3-US)
on this page work well?>
http://www.amazon.com/Power-Supplies-Computer-Accessori...:!493964,n:541966,n:193870011,n:1161760,p_4:Cooler Master&bbn=1161760&ie=UTF8&qid=1304715265&rnid=15784691
a b ) Power supply
September 19, 2012 7:43:11 PM

Cases don't need power supplies, PC components need power supplies.

What PSU you need has zero to do with whether your case is a HAF X or some other kind of case.
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a b ) Power supply
September 19, 2012 11:17:42 PM

Stay away from Coolermaster power supplies! Seasonic, Corsair, Some OCZ, XFX are some reliable names.
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Related resources
September 20, 2012 12:32:46 AM

rottwyler,

Depends on the wattage you need. Check out the calculator below and fill in your specs.

http://extreme.outervision.com/psucalculatorlite.jsp

Get a power supply that matches the amount of wattage you need.


Knightdog56,

Was there a particular issue you experience with Cooler Master power supply that we can help resolve?
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a b ) Power supply
September 20, 2012 12:43:19 AM

They do not live up to the rated wattage.
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a b ) Power supply
September 20, 2012 1:10:24 PM

Oh my lord! A Cooler Master rep!

Your cases and processor coolers are top notch. We dont recommend anything more often than the HAF cases and the Hyper 212 coolers around here.

However, the PSUs do need some work.

If you want to do some explaining, try to explain this:

Cooler Master Extreme 2 475w Power Supply RS-475-PCAR

http://tinyurl.com/9jsbpy8

Failed on the +12v rail at 81% of stated wattage. That is on the +12v the absolute most important one. The one that damages motherboards, hard drives, video cards, and all that good stuff when it fails.

or this one

Cooler Master eXtreme Power Plus 600w (or the 550w version of this) RS-600-PCAR-E3

http://tinyurl.com/c8yyy2c

Failed again on the +12v line at 80% of stated wattage.

I could do this all day if you want more.
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September 20, 2012 9:50:22 PM

So just to confirm this is not based on personal experience but on a review website? The review site uses a simulated load on the power supply and not a real world system that consumes the amount of wattage as I just want to be clear?

Ultimately, we will look into this issue.
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a b ) Power supply
September 20, 2012 10:09:37 PM

I have personal experience troubleshooting the computers of 100 people coming in here with failed Cooler Master PSUs, just to confirm.

I don't appreciate you trying to play the "you don't know what you are talking about" card, btw. You don't see me sitting here saying you don't know how to do your job.

You make the PSUs and I tell people not to buy them, because I am intimately familiar with the quality of a vast array of PSU makers.

Just like you make the cases and the processor coolers and I tell people to buy them because they are best in class. I am also familiar with a vast array of these types of products as well. Indeed I have an in depth knowledge of almost all kinds of computer products.

As far as review websites go, nobody knows what they are talking about more than the person that runs HardwareSecrets.com. It is the #1 PSU review website on the internet. That being where both of those links trace back to. Don't bother trying to play the card that the reviewer doesn't know there stuff.

It is quite simply inexcusable to have failures on the +12v lines because of poor voltage regulation and large amounts of noise. That stuff breaks costly hardware over the long term. It isn't like a failure on day 1 is going to fix itself over the next few years.

The testing methodology is sound and clearly shows the weaknesses that seriously endanger PCs over the 1 - 3 year time frame.

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September 20, 2012 10:53:25 PM

The purpose of my post is to find out what tests were done. We don't just test a qty of 1 of 1 model and say the entire line is faulty or in your case every line of power supplies we offer:

Quote:
Stay away from Coolermaster power supplies!


Its not clear from hardwaresecrets if they are testing 1 or 100. Its not an attack at hardwaresecrets its a question regarding how many tests he made so we can go from there and assess the situation.
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a b ) Power supply
September 20, 2012 11:51:07 PM

What do your 100 tests show for the +12v voltage regulation on those units at 81% load?
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September 21, 2012 12:02:04 AM

Raiddinn said:
What do your 100 tests show for the +12v voltage regulation on those units at 81% load?



As i specifically mentioned, we are looking into this, so we don't have results yet as this has been forwarded to the region that actually carries the power supply you mentioned. We are not carrying the Extreme 2 series in the US. So if there are any available in the US, they would have to have been imported.

Raiddinn said:
Cooler Master eXtreme Power Plus 600w (or the 550w version of this) RS-600-PCAR-E3

http://tinyurl.com/c8yyy2c

Failed again on the +12v line at 80% of stated wattage.

I could do this all day if you want more.


In regards to the Extreme power plus 600W, hardwaresecrets went beyond the spec advertised. The power supply has a spec of 18A on the 12 rail for two rails, hardwaresecrets pushed it to 19A and beyond which caused the power supply to fail. (page 7 of 9)
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a b ) Power supply
September 21, 2012 12:47:11 AM

There must have been dozens of tests done before they were cleared to be shipped to retail outlets.

Here are a couple more you can look into that can't deliver stated wattage:

Cooler Master Elite Power Plus 460w @ 91% on +12v

http://tinyurl.com/7m4x32q

Cooler Master eXtreme Power Plus 400w @ 77% on +12v

http://tinyurl.com/cm82e83

Cooler Master GX 750w @ 80% on both +3.3v and +5v

http://tinyurl.com/cvzyoye

On the upside, the Silent Pro models seem to do pretty well.
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September 21, 2012 4:13:59 PM

Raiddinn said:
There must have been dozens of tests done before they were cleared to be shipped to retail outlets.

Here are a couple more you can look into that can't deliver stated wattage:

Cooler Master Elite Power Plus 460w @ 91% on +12v

http://tinyurl.com/7m4x32q

Cooler Master eXtreme Power Plus 400w @ 77% on +12v

http://tinyurl.com/cm82e83

Cooler Master GX 750w @ 80% on both +3.3v and +5v

http://tinyurl.com/cvzyoye

On the upside, the Silent Pro models seem to do pretty well.


The power supplies in question were tested in a server type environment, if you check each test, they were tested at a 110F minimum. That is the reason I mentioned if they were tested with a computer instead of a simulated load because it doesn't provide real world values. The power supplies in question, for the most part, are designed towards entry level desktop systems not servers (@ 50C mark). Specifically, the GX 750 was tested more than 2 years ago, we have definitely made revisions since then to improve the product.
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a b ) Power supply
September 21, 2012 10:10:09 PM

If a PSU can only do 18A max on the 12vs then its probably a good idea to put in protections that shut it off before you can get 19a. That way hardware in the PC doesn't get damaged.

Regardless, the PSU with 2x 18A x 12v = 432w, which is a lot less than 600w. Even 2 years ago real world PCs still overwhelmingly favored 12v lines for their power usage, so it should really be called something more like a 450w PSU instead of a 600w.

Whatever a PSU is rated at, it should be able to get at least 95% of that off the +12vs.

Take, for example, my PSU. One that is exactly in line with what everyone here on TH recommends that people get. It is an XFX Pro 650w Core and it is shown in the below link getting 2x 30a x12v = 720w from the 12vs without blowing the PSU and without failing on voltage or noise levels.

http://tinyurl.com/8bcuaak

That is a test in the same type of "server environment" and it still shows the PSU being able to easily exceed stated wattage purely off the 12v, with the full draw being 815w off a labeled 650w.

I am not sure its adequate to call it a server environment, either. As a network admin I have seen my share of server environments and most of them were being chilled to well below room temperature (less than 60 F).

Testing at 110F more closely simulates real world worst case scenarios. The temperatures inside a PSU can get to be much hotter than the temperature in the room, especially when the PSU is top mounted and the PSU fans are the only fans providing any exhaust flow. Add to that a higher than usual room temperature to simulate the summer months and 110F in the PSU is not unthinkable in the real world.

I would never recommend that people run their PSUs like that, but it should still work in that sort of circumstance.

When PSUs are tested and rated at 20 or 25c, it is more of a best case scenario labelling which is misleading at best.
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