Silverstone Zeus 1200W Power Supply Review

Efficiency Testing


At lower wattages the ZM1200 struggled a bit but it kept its power consumption at more than acceptable levels; the power consumption of 12W when the system was turned off was also extremely good. However, as load increased it seems like this power supply got a second wind by posting some very good numbers. You will also notice that Silverstone’s new flagship power supply was able to complete our Extreme Load Test by pulling a whooping 1058W from the wall. Since the other power supplies have not been put through this test, there are no results for them here.


Voltage Regulation Testing


+3.3V Regulation


Here we go again with next to no variance on the +3.3V rail since modern computer systems do not use this rail much at all. The results are an almost foregone conclusion.


+5V Regulation


+5V regulation was a bit more interesting but the Zeus held things together quite nicely all the way into out most stressful test. While there was a bit more movement than we have seen with some of the past power supplies, a 0.05V change from idle to high load is a great result.


+12V Regulation


Once again like in past reviews we see a small difference in the voltages going from CPU LOAD to GPU Load and this is probably due to minor variations between the PCI-E and EPS12V connector. Nonetheless, this is the most important of the voltage regulation tests and it shows the Silverstone Zeus performing admirably well through even the most stressful situations. One thing that we were a bit surprised to see was seemingly sudden voltage drop between the Idle and CPU Load but it was not anywhere near enough to get concerned about. When looking at these results, it is more than obvious that this power supply is ready to play with the Big Boys.