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1000w Overkill? maximum reading 170w. - Page 3

post #21 of 29
Maybe under load. It does seem a little high. 750W for a one card configuration? Hmm...You do have a lot of other stuff, but fans draw maybe 2-5W max...
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post #22 of 29
Thread Starter 
The PSU im using is 80+ GOLD Rated. At peak its 85% efficient.

This was my test; the power cord from the psu is plugged into the watt meter. The watt meter is plugged into the wall. So its measuring what the computer is drawing from the wall. I just did another test (after resting the meter). I am getting 203W while running fans on max speed, nod32 scanning the main hard disk, prime 95 blend, and heaven benchmark running. That stressed all the main components of the system.

The phase setting in the bios is set to Standard Intel.
Edited by mikeseth - 8/7/11 at 5:11pm
post #23 of 29
Quote:
Originally Posted by E-Peen View Post
This is true, but the PSU will always be there for future hardware generations
graphics cards are getting MORE power efficient, not less, i doubt in a few generations anything will require a 1000w psu.... wait..... that means your point is valid.....
post #24 of 29
Quote:
Originally Posted by Phaedrus2129 View Post
Actually PFC does nothing to improve a PSU's efficiency, stability, wattage, or anything like that. It's there to correct the input voltage and current becoming out of sync. Alternating current is like a sine wave, and non-resistive loads (like those presented by capacitors, inductors, and transistors) can cause the voltage and current waveforms to become out of sync. This *basically* means that a higher current is pulled for a given wattage load, without average voltage decreasing. That higher current is called "apparent power". The ratio between apparent power and real power is called the power factor, and power factor correction corrects power factor, by re-syncing the current and voltage waveforms.

Cheap power/voltage/current measuring devices make certain assumptions when measuring those numbers. For instance, they may measure the angle of current waveform, rather than directly measuring it. If so, and if the active PFC used in a PSU causes a slight change in angle at that point (since the PFC isn't perfect--usually .980-.999) then that may cause the meter to be way off in its readings.

In 90% of cases a cheap power meter reading draw from an APFC PSU will read 1-5% low, occasionally up to 10% low. On rare occasions it may read 15-20% low.
Thanks.

I've also got a baytech power distro unit for our media server that does around 120w on the Kill-A-Watt and roughly the same on the readout from the Baytech. 5-10% isn't a HUGE problem to me personally, and should really to anyone here since we usually run well within the limits of our PSUs.
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post #25 of 29
My sig rig at 4400mhz 1.38v , SLI GTX 285 FTW edition + OC, 8 HDD, 4 fans at 3amps/12v, 20W pump, and 30W in lighting games at ~700W, peaks at 850-900W at the wall


Now I intentfully tried to make power usage go up, I saw the power meter spike to 1100W when using Furmark and LinX... but that's very rare. Rig now with less stuff does 600W MAX
 
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post #26 of 29
GPU is what usually draws a lot of power. my rig draws 180w max but when it's off it draws 5w just sitting there...
    
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post #27 of 29
Thread Starter 
Quote:
Originally Posted by robwadeson View Post
GPU is what usually draws a lot of power. my rig draws 180w max but when it's off it draws 5w just sitting there...
That's pretty sad. My rig is using 0W (the meter i have can measure the slightest amount. For ex, a led light would read as <1W if its drawing any power.) So i get no wasted electricity when the system is off. It around ~10-20W when in sleep mode.
post #28 of 29
Quote:
Originally Posted by Phaedrus2129 View Post
And you or someone with a similar opinion will be there to recommend that he upgrade his PSU so that he's future proof for the next generation.
No I wouldn't

He has a 1000w PSU, and from the information you posted in this thread he's perfectly fine for MANY years to come.
post #29 of 29
With my sig rig I only pull 700watts from the wall with the CPU and GPUs pegged.
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