Performance Rating

Overall performance of the UD850GM is not competitive.

Noise Rating

The graph below depicts the cooling fan's average noise output throughout the entire operating range of the PSU, with an ambient temperature between 30°C and 32°C.


Average noise output is about the same as for the P850GM. Given the compact dimensions of the PCB and Lelon caps on the secondary side, I wouldn't suggest lower fan speeds.

Efficiency Rating

The graph below shows the PSU's average efficiency throughout its operating range, with an ambient temperature between 30°C and 32°C.


Average efficiency is notably lower than the P850GM, but the platform still performs well in this regard.

5VSB Efficiency Rating

The graph below shows the PSU's average efficiency at 5VSB, with an ambient temperature between 30°C and 32°C.


The 5VSB rail has decent efficiency.

PF Rating

The graph below shows the PSU's average PF throughout its operating range, with an ambient temperature between 30°C and 32°C.


The APFC converter needs tuning to perform better with 230 V input.