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GTX 570 SLI with a 750W PSU - Page 2

post #11 of 21
Power consumption will increase, even without additional voltage, if the clock speed is increased.
 
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post #12 of 21
Quote:
Originally Posted by SpammisT View Post
Ehem..

(points down to my psu)

Problem?
*High five. Look at my sig to see the PSU I'm getting for this rig
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post #13 of 21
Thread Starter 
Quote:
Originally Posted by theonedub View Post
Power consumption will increase, even without additional voltage, if the clock speed is increased.
But how is that physically possible? I mean other than the very little increase in power consumption due to warmer temperatures (and higher fan speeds)... the power consumption should not increase.
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post #14 of 21
I think you are assuming that power consumption is based solely off voltage, which is not the case. Just like a CPU, the amount of power used by a GPU is determined by a variety of factors including clock speed and voltage. Bumping up your clocks doesn't magically get you more performance, more energy is used to fuel that extra performance.

That's why you see things like AMD's PowerTune, that dynamically change clocks to cut down on power consumption and keep cards within TDP limits. If clock speeds didn't affect power consumption these features would be pointless.
 
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post #15 of 21
I don't know much about electricity but from my understanding voltage is the amount of "force" that the current has.

Wattage is how much power it actually draws, the two are related but not mutually exclusive. Voltage isn't a "power" it designates how much force the the energy coming in has I believe.

Take for instance a AMD Phenom II, they have higher voltage, but draw less wattage than 1366 chips.

I could be 100% wrong, as I said I don't know much about electricity, I just use it everyday and know not to stick my finger in the outlet.
    
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post #16 of 21
It'll run fine oc'd. I ran it with 2 580s oc'd with an I7. Played through metro 2033 the entire game no problem.
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post #17 of 21
Yes the tx750 will power the 570s oced with ease.
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post #18 of 21
@zelix you sound very confident bro..lol

@OP;

Calculated Power consumption of GPU:
Single Stock: 224.8 watts (500watt PSU recommended)
Single OC: 280 watts (550 watt PSU recommend)
SLI Stock: 426.4 watts (800 watt PSU recommended)
SLI OC: 576 watts (1000watt PSU recommended)
http://forums.extremeoverclocking.co...d.php?t=352023

You need a 750+ Watt power supply unit if you use it in a high-end system (800+ to a KiloWatt is recommended if you plan on any overclocking).
http://www.guru3d.com/article/geforc...-sli-review/13
Edited by coolhandluke41 - 3/28/11 at 10:48pm
    
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post #19 of 21
Quote:
Originally Posted by coolhandluke41 View Post
Calculated Power consumption of GPU:
Single Stock: 224.8 watts (500watt PSU recommended)
Single OC: 280 watts (550 watt PSU recommend)
SLI Stock: 426.4 watts (800 watt PSU recommended)
SLI OC: 576 watts (1000watt PSU recommended)
http://forums.extremeoverclocking.co...d.php?t=352023
Its' 870 from the wall - in furmark no less with OCP turned off (ka boom).

My brain is telling me the total system draw in FurMark with OCP turned off while overclocked is 696.

So I guess yes, if you do something stupid like turn OCP off and run FurMark a 750 should handle it.

I'd like to know why he recommended a 1000w psu when it's not even close to drawing that much power in a test that draws way more power than any real game.
    
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post #20 of 21
Quote:
Originally Posted by BallaTheFeared View Post
Its' 870 from the wall - in furmark no less with OCP turned off (ka boom).

My brain is telling me the total system draw in FurMark with OCP turned off while overclocked is 696.

So I guess yes, if you do something stupid like turn OCP off and run FurMark a 750 should handle it.

I'd like to know why he recommended a 1000w psu when it's not even close to drawing that much power in a test that draws way more power than any real game.
no dude 750 won't cut it with heavy SLI/CPU OC+all your components period
stock to mild oc sure why not
EDIT;it's all about the amp's
Edited by coolhandluke41 - 3/28/11 at 11:04pm
    
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