On Monday, July 29, 2013 01:51:12 PM Joseph Apuzzo wrote:

Ok for some home projects I decided to get one of these:

http://rosewill.com/products/1763/ProductDetail_Overview.htm[1]

It's a small device used to test if your power supply is good or bad.


Why? Well if you have a PC that is dead ( you power it on and nothing 
happens ) you have a problem. The next logical test is do disconnect 
everything from the power supply except for the mother board. Next power 
it up again, if your monitor shows the Bios started then you most likely 
have a good power supply. Other then that test one usually has a spare 
power supply to swap to see if the mother board is bad.



With that said, I and other have found that test is really no longer valid. 
Power supplies for all makers are failing, in different ways. Thus I bought a 
tester to verify my collection of PC and spare power supplies. 




I regularly read the Anandtech Power-Supplies forum. I've seen it 
mentioned there many times that to adequately test a switch-mode PSU, 
the PSU must be under load. From looking at the overview and specs of 
the Rosewill PSU tester, it is unclear if this unit presents an adequate load, 
or if it is just a multimeter with PSU connectors.





-- 
Phenom II X2 555 | Biostar TA890FXE | 2 x 4G DDR3 1333 | Maxtor 80G PATA 
| GeForce 210

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[1] http://rosewill.com/products/1763/ProductDetail_Overview.htm
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