Test of power supply unit -5v not functioning
Test of power supply unit -5v not functioning
I bought a redragon 850 RGB power supply and my coolmax analog power supply tester indicated a failure on -5v but I cannot find notice of -5v rail listed on power supply. Should I return the power supply to Amazon? It also shuts off when I attempt to separate the 4-pin motherboard plug and plug it into the otherside of the tester.
The -5v isn't found on any PSU from the last ten years or more. What's the point of testing a brand new PSU? Is it this one?
https://redragonshop.com/products/8...ar...7961424094
The requirement of -5v on pin 20 (white wire) existed until ATX12v v1.2 in 2002, when it was mandatory, and was removed with ATX12v v1.3 in 2003—meaning pin 20 has been unused for over two decades.
Your question about using an old 20 pin analog PSU tester with a 24 pin PSU is understandable. Let me help clarify.
It depends on how you define the test.
Many contemporary 24-pin power connectors from a power supply can no longer be divided into 20 and 4, which may cause difficulties when inserting the tester into the cable.
If you manage to connect it properly, it should function correctly.
How does this tester actually operate?
Are you attempting to place it between the motherboard and the power supply, or are you only testing the power supply itself on your desk?
No special tools are required to check a power supply.
All you need is a paper clip and a basic voltage meter.
Testing the power directly inline presents greater challenges, so I wouldn’t recommend using outdated test gear with modern computers.
They offer sophisticated equipment that displays power usage per pin rather than just voltage.
Although prices have decreased, it’s still beyond the capability of even a casual computer technician.
This is more suited for repair shops or reviewers who need such specialized tools.
It seems you're questioning why the PSU would damage your motherboard despite factory testing. The explanation is that even tested components can have hidden flaws, and no test guarantees absolute safety.