Diagnose and troubleshoot your desktop PC power supply.
A failing power supply can often be at the root of problems you might not expect, like random lockups, spontaneous reboots, and even some serious error messages
The PassMark PSU Tester is designed to quickly and comprehensively test a PC power supply.
The PSU tester can be used inline with a connected Power Supply and full load.
A PC can be connected by USB to monitor the PSU tester in Inline mode.
The PSU tester can be used in standalone mode.
A PC can be connected by USB to monitor the PSU tester in Standalone mode.
Connect the PSU Tester to your PC via the USB connection and you can monitor the PSU statistics, including voltage, current, power, ripple and timing for each voltage rail.
Measurements are clearly displayed with Green background when the value is within acceptable range, and Red background when the value is outside the valid range.
All data can be exported to a text file report.
PassMark's Inline PSU Tester is the most extensive and complete diagnostic utility for PC ATX Power Supply Units on the market. Here's how it compares to other PSU testers.
|Generic PSU Tester
||PassMark Inline PSU Tester
|Measures Current and Power|
|Test for ripple on main voltage rails|
|Measure and verify slew rate (ramp speed)|
|Verifies Timings (T1, T2, T3, T6)|
|Check turn-on slope (smooth power up)|
|Check Power Sequencing|
|Standalone mode (no motherboard connection)|
|Inline mode (tests PSU under full load, connected to motherboard)|
|USB connection (for monitoring)|
|PC (Windows) monitoring software|
|Comprehensive Users Guide|
Safety should be your primary concern during a power supply test with a PSU tester
Remove anything conductive from your hands (e.g. metal rings, watches, or bracelets) before testing a PSU or working inside your computer.
Only use the original cables that comes with the tester. The PCIe cable that comes with the tester, is not a standard cable and is custom-made for the tester. Using other cables could lead to short circuit between the voltage rails.
Make sure all the cables are fully inserted. A loose connection introduces more series resistance which can lead to melting of the wires under high load.
See smoke coming from the power supply or inside the case or smell a burning or solder scent, unplug the computer from the wall. Do not touch the PSU or the PSU Tester in such circumstances.
If the PSU Tester is inline (connected to both power supply and motherboard), do not power up using the keypad. Instead, use the PC power button.