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PSU enough for SLI conf. - Page 2

post #11 of 22
no
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post #12 of 22
Quote:
Originally Posted by Hokrollo View Post
Profs made the calculator mate lol Guys in here are probably primary amateaurs tbh.
There's a few people on these forums that know a ton about psus.
Tator, allikat, phaedrus, shub, are amazing. I'm not too bad myself usually.
Calculators tend to go over what's needed due to the huge range in quality of power supplies.
Edited by Eagle1337 - 2/8/11 at 4:18am
post #13 of 22
Quote:
Originally Posted by Hokrollo View Post
Profs made the calculator mate lol Guys in here are probably primary amateaurs tbh.
PSU calculators are unreliable, period.
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post #14 of 22
Quote:
Originally Posted by GameBoy View Post
PSU calculators are unreliable, period.
Yup apparently my system can't run off of a 520w psu.. which it can.
post #15 of 22
Quote:
Originally Posted by SakkeMO View Post
Hi!

Just recently build rig shown on sig, what was on my mind when i came up with this was if i want to upgrade this in the future, lets say i want to get an another graphics card for extra performance later, is my Corsair HX650 enough to run SLI?
Hi, Sakke.

I can tell you that, as we speak, my own 650HX is powering (2) GTX 260s in SLI, along with an overclocked i7-920, (4) hard drives, a USB 3.0 PCI-e adapter card, a Corsair CMXAF2 memory cooler, and (4) case fans.

Not sure if the following graphic has any relevance, but here's what my battery backup software claims my system is currently drawing, wattage-wise:



I really should've gone bigger on the power supply, but it seems to be handling everything fairly well thus far. Best of luck in your SLI endeavors!

    
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post #16 of 22
Quote:
Originally Posted by BammBamm View Post
Hi, Sakke.

I can tell you that, as we speak, my own 650HX is powering (2) GTX 260s in SLI, along with an overclocked i7-920, (4) hard drives, a USB 3.0 PCI-e adapter card, a Corsair CMXAF2 memory cooler, and (4) case fans.
750s use a fair bit more power then the 260s did.
post #17 of 22
Quote:
Originally Posted by Eagle1337 View Post
There's a few people on these forums that know a ton about psus.
Tator, allikat, phaedrus, shub, are amazing. I'm not too bad myself usually.
Calculators tend to go over what's needed due to the huge range in quality of power supplies.
Ye a few as you say yourself. Also better have too much rather than too little. Also because this guy overclocked his CPU quite a lot and will probably do it with his GPU as well. So overestimating his needs are better than underestimating them.
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post #18 of 22
Good point, Eagle.

Say... how can we tell how much "headroom" our PSUs have? In other words, how close am I to maxing-out this hard-working Corsair of mine?

    
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post #19 of 22
Quote:
Originally Posted by Hokrollo View Post
Ye a few as you say yourself. Also better have too much rather than too little. Also because this guy overclocked his CPU quite a lot and will probably do it with his GPU as well. So overestimating his needs are better than underestimating them.
Headroom is only good if you're planning on filling the extra watts. 99% of the time that isn't the case and people usually buy lots of headroom because they are afraid of running their PSU at close to maximum capacity (nothing wrong with running the PSU near/at maximum capacity either). There is also some BS myth going around that it's best to run your PSU at 50% load.

Quote:
Originally Posted by BammBamm View Post
Good point, Eagle.

Say... how can we tell how much "headroom" our PSUs have? In other words, how close am I to maxing-out this hard-working Corsair of mine?

Honestly, you add the figures up yourself and give it a rough guess, otherwise use a Kill-a-watt.
Edited by GameBoy - 2/8/11 at 4:41am
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post #20 of 22
A friend of mine runs 570 sli and a I7 950 on his HX750, but that's as low as i'd go. 650W isn't enough ..
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