Performance

Zalman ZM1000-HP
AC Input	100V-240V, 8A-15A, 50-60 Hz
DC Voltage	+3.3V	+5V	+12V1	+12V2	+12V3	+12V4	+12V5	+12V6	+5VSB
Max. Output	40A	40A	18A	18A	28A	28A	18A	18A	3.5A
	250W		960W						17.5W
	1000W

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

Voltage stability on all lines is very good, especially the 12V line is among the best we've ever seen in our testing. The 3.3V line fluctuates a little bit more but is still very stable.


The ripple voltage looks good as well, with an amplitude of 16 mV from top to bottom.

Standard deviation 12V	6.04
Standard deviation 5V	3.89
Standard deviation 3.3V	8.87
Power Factor	0.99
Ripple Voltage 12V	16.0 mV
Power Efficiency @ 320 W	83% (320W:386W)

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.


Compared to the Zalman ZM850-HP that we tested recently, the efficiency has gone up by around 2% bringing this PSU even closer to the top ranked competition products. The high efficiency means that less power is converted into heat in the PSU, so the fan can run slower and quieter.