Originally posted by: Sunner
Originally posted by: Matthias99
Originally posted by: TerryMathews
Originally posted by: shinotenshi
Why are people waiting for the new PC&C power supplies. dear lord who needs 700 and 850 watts(these are pc&c, so thats 750 and 850 watts of continous power at 50 degrees Celcius. This has to be overkill even for a dual opteron, dual 6800 ultra system.
Some of us burn up that much power
<- 10 HDs, 2 Xeons, Radeon 9700 Pro
CPUs and video cards don't get you nearly as badly as HDs and fans do.
10 HDs@~20W each + 2 Xeons@~100W each + 1 9700Pro@~60W != 700-850W of total system usage. You'd actually be a viable candidate for a 500-600W PSU, though.
Fans pull 2-5W each. Unless you've got dozens of them, or multiple Deltas in there, the draw from them is usually negligible.
20W for a HD is probably a tad on the high side too, more like ~10W depending on the drive type.
I don't know what you guys are smoking, but the fans on my Xeons are rated at 1.25
A @ 12V when running at full speed. 1.25*12 = 15W. Per fan.
Because I'm using removable HD trays, I've got a sum total of ~20 fans in my system (12 alone in the HD trays). Your calculations also didn't take into account any other periphals in the system.
I'm not saying everyone needs a 750W PSU. What I'm saying is that the peope with dual processor systems
that have equally potent peripherals are a good candidate for it. Right now, I'm using two PSUs so switching over to one is not something I'm all that concerned about. If I didn't have this spare SCSI HDD tower though, I might consider one of these 'monster' PSUs because I know firsthand that my Antec True480 can't handle all my stuff anymore.
EDIT: I know that the fans don't always pull that 1.25A. But, they do when they're at full load. Full load would be most likely when the system is drawing the most power in general - lots of HD access, CPUs maxxed out, etc. The 'It never rains, it pours' principle. Even if it only comes in short bursts, you have to plan for your
maximum power consumption, not your average.