Sure, here's a revised version:

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Hi,

I am attempting to install an Nvidia A16 GPU into a Dell PowerEdge T630 server. To power the GPU, I connected an X7C1K GPU power supply expansion board. However, when I start the server, I encounter the error "PSU 0034: An under voltage fault detected on PSU 2. Check power source." My power source is 1600 watt.

Any idea what might be going on here?

Thank you for your help.