Performance

The UL number E130843 reveals that the PSU is made by OEM manufacturer Topower for Mushkin.

Mushkin XP-800AP
AC Input	115V-230V, 5-10A max., 50-60 Hz
DC Voltage	+3.3V	+5V	+12V1	+12V2	+12V3	+12V4	+5VSB
Max. Output	26A	20A	20A	20A	20A	20A	3.0A
	160W		768W				15W
	800W

Tested on: AMD Athlon64 FX-62 @ 2800 MHz, ABIT AT8, 2x 512 MB DDR400, WD Raptor 36 GB, Radeon X1900 XTX + Radeon X1900 XTX Crossfire

The 3.3V and 5V line of the Mushkin XP-800 AP are exceptionally stable. Even though the 12V line shows some fluctuations these are completely normal and no bad sign.


The ripple voltage is really big with 42.0 mV. If you look closer, you can see that this is mainly cause by a small number of spikes. Most of the ripple can be found within about 25 mV.

Standard deviation 3.3V	3.80
Standard deviation 5V	1.55
Standard deviation 12V	7.18
Power Factor	0.99
Ripple Voltage 12V	42.0 mV
Power Efficiency	84.1% (367W:437W)

For easier comparison between power supplies we put the (normalized) line regulation standard deviation into graphs.



Standard deviation is a statistical term, which tells how far away from the average the measurements are. In other words it's the average of the average.
A large standard deviation indicates that the data points are far from the average and a small standard deviation indicates that they are close within the average.
So the smaller the standard deviation is, the better the line regulation.