This is actually a very good power supply tester unit. The key to getting the most out of it depends on a users understanding of it, which I will be explaining in this review.
Find a place where you can set it up to hook up your connectors both the 20/24 pin and the 8 pin connector and leave it there still, while you turn your PSU's on and off switch. I mention this because holding it or moving around the power supply tester will give you incorrect readings.
Next, something else that I haven't seen mentioned in the reviews is you turn off your PSU and then hook up your next connector, whether it be the SATA, Molex, 4-6-8 pin connectors, etc. The connectors weren't meant to be "hot-swapped" so always turn your power supply tester off before going to your next plug.
The PG rating means "power good" and it needs to be between 100 ms to 500 ms. If you are getting a 0 ms, that particular plug is dead and you can't use it anymore.
The LL value means the voltage is too low and HH means the value is too high. You'll also get a buzzing sound with either a PG - 0 ms, LL, HH rating, so pay attention. This indicates the voltage is out of tolerance for a peripheral and you aren't getting any power at all, aren't getting enough voltage or are getting too much and could be frying your equipment, respectively.
The tolerance range is ideally +/-5% (+/-10% for the -12v rail) of what the voltage is supposed to be giving, but here are the max ranges I've found, so if your number isn't in this range you now know what to do with your PSU.
+12v - 12.5v
+5v - 5.3v
+3.3v - 3.5v
-12v - 13.2v
You can indeed test this unit under a load, but you have to take a paper clip and you'll need to connect it to your main 20/24 pin connector. Connect as many peripherals as you can and look for the PWR_ON green wire on the 20/24 pin connector and connect one end of a paper clip here and the other to a black ground wire. This starts the PSU with everything running.
That's it, folks, a review that clearly explains how to use this tester.
Have a good day.
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Customer Review: Succesfully identified a bad power supply
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This Item  Optimal Shop 20+4 Pin LCD Computer Power Supply Tester for SATA IDE HDD ATX ITX BYI Connectors-Black |  |  |  |  |  | |
| Price | $14.99 | $17.80 | -21% $109.99 List: $139.99 | $15.06 | $39.99 | $14.99 |
| Delivery | Get it as soon as Saturday, May 11 | Get it as soon as Saturday, May 11 | Get it as soon as Saturday, May 11 | Get it as soon as Saturday, May 11 | Get it as soon as Saturday, May 11 | Get it as soon as Saturday, May 11 |
| Customer Ratings | ||||||
| Value for money | ||||||
| Quality of material | ||||||
| Sold By | Optimal Shop | eboxer | Amazon.com | Letaerr | ARESGAME TECH | Optimal Shop |
| connector type | atx,sata | atx,pci e,sata | EPS | ATX | ATX | atx,sata |
| form factor | ATX | ATX | ATX | ATX | ATX | ATX |
| system bus connector | 20+4 pin,20-pin,20-pin/24-pin | — | — | 24 Pin | — | 20+4 pin,20-pin,20-pin/24-pin |
| weight | 0.2 pounds | 0.08 kilograms | 6.6 pounds | 100.67 grams | — | — |
Reviews with images
Easy to use
I used it to check my PC Power Supply and it shows and beeps that is no good the PG supposed to be around 300 and it shows is less and that's why my Graphic Card won't turn on, in my case.
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Reviewed in the United States on April 15, 2017
Reviewed in the United States on February 8, 2024
I used it to check my PC Power Supply and it shows and beeps that is no good the PG supposed to be around 300 and it shows is less and that's why my Graphic Card won't turn on, in my case.
Images in this review
Reviewed in the United States on November 12, 2022
Reviewed in the United States on January 20, 2024
Reviewed in the United States on February 6, 2022
Reviewed in the United States on August 5, 2022
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Alberto Angcollan Orozco
Cumple su función
Reviewed in Mexico on September 21, 2021