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will i have the power?

post #1 of 30
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hey im looking into getting a EVGA 580 SC and am just wondering if my current PSU can handle it?

acorrding to EVGA the Minimum recommended power supply should be +12 Volt current rating of 42 Amps and my PSU is +12V with 41 Amps so unless im OCing it i should be fine right???


all info from
http://www.evga.com/products/moreinf...015-P3-1582-AR
http://www.corsair.com/power-supplie...-1/vx550w.html

just wondering cause i dont want a nice new card that i cant run
    
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post #2 of 30
I think the card will run with your current psu, you'll just have to be careful. I don't know how well things would go if the usage got to 100% or if you OC'd it at all. A 650W or even a 750W would be much more stable.
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post #3 of 30
Tbh you could do with a 750w psu but it should be fine! but under heavly load it might get funky
post #4 of 30

and yes it should be fine, those stats are overrated. Don't expect huge overclocking capabilities, but you will encounter a small-medium bottleneck with your CPU anyway
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post #5 of 30
You should be alright, though definitely open up afterburner and see if you can lower the stock VID without affecting stability.
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post #6 of 30
Quote:
Originally Posted by derickwm View Post
I think the card will run with your current psu, you'll just have to be careful. I don't know how well things would go if the usage got to 100% or if you OC'd it at all. A 650W or even a 750W would be much more stable.
No. No, it wouldn't. His Power Supply will run both with the CPU heavily over-clocked just fine.

The GTX 580 consumes a bit over 150W with the limiter on. That's pretty much nothing. His CPU OCed to 1.4V will consume around 150W as well. Including peripherals adds 50W. All in all, around 350W at the wall. Taking into account 80% efficiency, the PSU will only have to produce around 280W.

OP, don't worry. Your PSU won't break a sweat.

    
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post #7 of 30
Quote:
Originally Posted by LOL_Wut_Axel View Post
No. No, it wouldn't. His Power Supply will run both with the CPU heavily over-clocked just fine.

The GTX 580 consumes a bit over 150W with the limiter on. That's pretty much nothing. His CPU OCed to 1.4V will consume around 150W as well. Including peripherals adds 50W. All in all, around 350W at the wall. Taking into account 80% efficiency, the PSU will only have to produce around 280W.

OP, don't worry. Your PSU won't break a sweat.

By that logic you only need 400w for SLI. You cannot do SLI 580's on 400w. Don't try to confused calculated wattage with efficiency factored in AND a limiter which can and does turn off into your calc and ontop of that slap the efficiency decrease.

50w perif + 180 cpu/ram + 270 gpu = 500. Efficiency, lets assume its 80% = 400w.
Thats a rough mix but better than yours, and I cba to make it detailed right now I have some 21'st May redemption dieing to do
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post #8 of 30
Quote:
Originally Posted by thealex132 View Post
By that logic you only need 400w for SLI. You cannot do SLI 580's on 400w. Don't try to confused calculated wattage with efficiency factored in AND a limiter which can and does turn off into your calc and ontop of that slap the efficiency decrease.

50w perif + 180 cpu/ram + 270 gpu = 500. Efficiency, lets assume its 80% = 400w.
Thats a rough mix but better than yours, and I cba to make it detailed right now I have some 21'st May redemption dieing to do
Yeah, that's not what I said at all. Obviously running a Power Supply at 100% of its capacity will reduce its lifespan or have other consequences. What I clearly meant is that he won't be pushing the PSU at all because it'll have to produce less than 80% of the power its 12V rail can handle.

Nice try twisting what I said, though.
    
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post #9 of 30
Quote:
Originally Posted by LOL_Wut_Axel View Post
Yeah, that's not what I said at all. Obviously running a Power Supply at 100% of its capacity will reduce its lifespan or have other consequences. What I clearly meant is that he won't be pushing the PSU at all because it'll have to produce less than 80% of the power its 12V rail can handle.

Nice try twisting what I said, though.
Quote:
Originally Posted by LOL_Wut_Axel View Post
No. No, it wouldn't. His Power Supply will run both with the CPU heavily over-clocked just fine.

The GTX 580 consumes a bit over 150W with the limiter on. That's pretty much nothing. His CPU OCed to 1.4V will consume around 150W as well. Including peripherals adds 50W. All in all, around 350W at the wall. Taking into account 80% efficiency, the PSU will only have to produce around 280W.

OP, don't worry. Your PSU won't break a sweat.
Your words, you provided 'evidence', kinda hard to twist numbers. You said it will consume 280w with 80% eff. Heavily overclocked CPU+GPU.
1) No that's wrong, even roughly it is far off.
2) I said with that logic/calc you can run 580SLI with 400w?
3) GPU's scale HORRIBLY when overclocked so do CPU's but less so.
4) 580 doesn't keep the limiter on and that PSU probably doesn't even have a decent amount of amps on the +12v rail

How did I twist your words?
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post #10 of 30
Quote:
Originally Posted by thealex132 View Post
Your words, you provided 'evidence', kinda hard to twist numbers. You said it will consume 280w with 80% eff. Heavily overclocked CPU+GPU.
1) No that's wrong, even roughly it is far off.
2) I said with that logic/calc you can run 580SLI with 400w?
3) GPU's scale HORRIBLY when overclocked so do CPU's but less so.
4) 580 doesn't keep the limiter on and that PSU probably doesn't even have a decent amount of amps on the +12v rail

How did I twist your words?
No. No, it's not. Again, 150W at the wall from a mildly over-volted Phenom II X4. A bit over 150W from the GTX 580 w/ limiter on. 50W for peripherals. All at the wall. Take into account 80% efficiency, and you end up where I said.

And no, with my logic you won't be able to run it reliably on a 400W PSU because it'll be running at almost 100% of its rated power, and something is bound to go wrong. He never mentioned wanting to run it without the limiter or with over-volts.

And you're twisting what I said clearly. I never said you'd be able to run two off a 400W PSU; you did. For what you said to be true the PSU will need to be maxed out. I've already provided evidence.

His current PSU will be just fine as long as he doesn't remove the limiter.
    
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