 |
Zalman ZM850-HP |
|
Performance
According to the UL Certification number E198072 this PSU is made by Zalman.
| Zalman ZM850-HP | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| AC Input | 100V-240V, 12A, 50-60 Hz | ||||||||||
| DC Voltage | +3.3V | +5V | +12V1 | +12V2 | +12V3 | +12V4 | +12V5 | +12V6 | +5VSB | ||
| Max. Output | 25A | 30A | 18A | 18A | 18A | 18A | 18A | 18A | 3.5A | ||
| 191W | 720W | 17.5W | |||||||||
| 850W | |||||||||||
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 is fine (as expected from a PSU this class). When running in CrossFire mode the voltages drop a little bit more but nothing to worry about.
The ripple voltage was measured on the 12V line at idle. With an amplitude of 17 mV it is about average.
| Standard deviation 12V | 6.56 |
|---|---|
| Standard deviation 5V | 3.52 |
| Standard deviation 3.3V | 6.01 |
| Power Factor | 0.99 |
| Ripple Voltage 12V | 17.0 mV |
| Power Efficiency @ 320 W | 81% (320W:396W) |
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.
Zalman did a great job engineering this power supply for high efficiency. With almost 81% it definitely deserves to claim "80 Plus".
