Since I am drawing 350w max load from the wall and the PS is 80% efficient, does this mean I am only drawing 280w out of the supply to my system? That sounds low considering the CPU is a 95w q9550 but maybe it is accurate.
Very helpful info all! I just did another test and measured:
Furmark: 340w avg peak 352w
Both Prime95 and Furmark: 427w
So the worst case scenerio of max draw at 427w times the 80% efficiency equals 340w. so if I am reading this right then at peak I am within 85% of max 400w. Being that I will rarely peak anything close to that prime95 + furmark test, we are good to go right?
Thanks for the incredible help.
November 11, 2010 8:59:33 PM
This is not the worst case scenario if you need all your devices to work at the same time, dvds, raid volumes, external HDs , usb sticks at best PSU isn't really a simple case.
If you plug your psu to a digital polymeter while you running these tests you may see really big drops in the ambers, volts never a stable line if the minimal values you get can effect the performance of a raid volume you jump to bigger watts psu thinking you be safe in there but finally 80% bronze PSUs can fully cover you how much? It depends on what you have connected or you thinking you will connect in the feature.
The worst case scenario is the 0 memory test but do it at your own risk. The settings in Prime95 64bits torture custom are in my case was 4096Kbs minimal FFT, 8000 memory usage, if you put all your memory to be used in Prime95 then when it hits 0 free memory in the task manager your will hear the disk to work is the swap file that is so big as the memory you used you will experience problems in cpu usage, you will not be able to give us flat line in task manager, some programs on screen may not updated if you move a window behind will be a hall, in other words your system will get back in ‘stone’ age when we had 4 Mbytes ram and your windows are forced to work in my case 8Gbytes ram +9 Gbytes swap = 17Gbytes with so small space....