Coolmax 14909 PS-224 LCD 24-Pin ATX Power Supply Tester

List Price: $19.99 Discount Price: $17.64

Features:

• ATX Power Supply Tester can easily check power supply
• LCD displays voltage
• Can test power supplies with various connections
• Alarm warns of overvoltage, undervoltage, no voltage

Customer Reviews:

A real time saver [Posted on 2008-07-19]
If you're looking at this, then you know what this is used for - but - don't be misled into thinking that the cheaper ones with the LEDs do the same job, this baby shows you the actual voltages as well as the time power good takes to go low.

I've had defective power supplies that test good with the LED style testers and wasted time swapping out system boards, only to find it was, in fact, the power supply, and this baby was the only thing that would show it.

CoolMax review [Posted on 2008-07-26]
Great tester for the typical ATX power supply in that the output readings are accurate and quick. No guessing at whether the P.S. is working..
However, one problem I noted was that it was unable to test the latest HP/Compaq units. I'm told by Coolmax that those P.S. are non-standard and though the 20/24 pin plug looks the same, the pin-outs are different. Coolmax was unable to offer a work around. In defense of CoolMax though, Nobody in our IT dept. has been able to find a reliable tester for those P.S.

CHEAP! [Posted on 2008-07-29]
I did a test of one power supply to try it out. Then about a week later I tried it again and the second power supply I tested it died. I knew it died before trying it again because I could smell a burnt smell. Tried it again to make sure and yep its fried!. Couldn't get my money back since its past the 30 days AMAZON offers so I am getting a replacement. I wonder how long the new one will last....?

Nice Unit! [Posted on 2008-07-31]
Pros:
Shows one decimal place precision measurements of +3.3V, +5V, +12V, +12V (second rail), and +5V standby via a nice blue backlit LCD display.
Displays the time in milliseconds it takes for the Power Good signal to go high (this is open drain) on the LCD (3 digits).
Shows go / no-go voltages on SATA / 4-pin MOLEX / floppy connectors via green LEDs.

Cons:
I would like another decimal place on the voltage measurements, but this is just a tiny con as one decimal place is sufficient for the tolerances involved (+/- 5% & 10%).
SATA connector isn't keyed, but putting it on backwards shouldn't destroy anything.
It isn't obvious which way the motherboard connector goes on as it doesn't have the lock mechanism and is a fairly tight fit.
No manual, just slightly confusing minimal text on the back of the display card - not a big deal as this unit is really simple.

Other thoughts:
The unit I received has a power button on the front, which you have to hold depressed for the unit to operate. This makes sense as it must load the supply and heat up somewhat. They must have updated the design without updating the pix.
The go / no-go LEDs that everyone is crabbing about make perfect sense to me - the voltages themselves are already measured at the mobo connector.

Coolmax power supply tester [Posted on 2008-08-31]
I bought this for my grandson who is taking computer science in college
The delivery was promt and he says that it works fine. He uses it in his computer repair work tah he does as a side line. He is very satisfied with the product.

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