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Seasonic X750 Gold, SLI question

post #1 of 22
Thread Starter 
Hey guys,

As some may know, I ordered a Seasonic X750 Gold a few days ago (should be here today actually biggrin.gif) to replace the PSU that my board sort of ruined when it went out. I was just browsing the webs and came across a rather enticing deal for a second GTX470.

Would 750 be able to cover a pair of GTX470's and my power hungry Thuban, reliably?

Input greatly appreciated, thanks biggrin.gif
    
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post #2 of 22
For sure!
I wouldn't worry wink.gif
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post #3 of 22
Thread Starter 
I know they build a tough PSU, but I was just a little concerned. 470s and Thubans are BOTH power hungry, to say the least.
    
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post #4 of 22
Quote:
Originally Posted by mezmenir View Post

I know they build a tough PSU, but I was just a little concerned. 470s and Thubans are BOTH power hungry, to say the least.

You'll have no problems at all! thumb.gif
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post #5 of 22
i have the x750 and ran a 6970 and 4870x2 on it with a thuban without a problem
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post #6 of 22
Thuban = 125 watts
gtx470 = 225 watts each
225 + 225 + 125 = 575 watts
seasonic X can deliver its rated power CONTINUOUSLY and should be able to peak out at 120% rated power easily.

you could have easily saved a few bucks and bought a seasonic X 650... and still have no problems what so ever...
post #7 of 22
Thread Starter 
Quote:
Originally Posted by psyclum View Post

Thuban = 125 watts
gtx470 = 225 watts each
225 + 225 + 125 = 575 watts
seasonic X can deliver its rated power CONTINUOUSLY and should be able to peak out at 120% rated power easily.
you could have easily saved a few bucks and bought a seasonic X 650... and still have no problems what so ever...

You're counting a Thuban at stock speed though, and also forgetting the 50w of HDDs and fans tongue.gif But I get the idea.

Thank you for the input guys, and I did end up getting that 470, it was a really good deal biggrin.gif SLI soon... after a new board.

650 wouldn't have been enough, at least not for 100% safe operation. I checked multiple PSU calculators, and at worst case scenario my computer is recommended ~800w PSU. I believe the minimum was 760-ish at 100% load on everything, with overclocks. So the X750 should be alright, I already know Seasonic X series PSUs are beasts. (I also know that PSU calculators have to account for not all PSUs being created equally). But a little user input is a lot more appreciated than just a calculator. +rep'd.
    
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post #8 of 22
Quote:
Originally Posted by mezmenir View Post

You're counting a Thuban at stock speed though, and also forgetting the 50w of HDDs and fans tongue.gif But I get the idea.

I know, but to even hit that you'd have to run prime95 24/7 biggrin.gif what's the chance of that happening? biggrin.gif even if you do heavy OC, it's not likely to hit the TDP even during game load. as far as fans/HDD's, fan doesn't always run at max unless you set it up to run max all the time. personally i have most of my fans on automatic control. HDD only use max power intermittently so the actual draw is much lower. (hence the part i point out the PSU can operate at 120% peak easily for intermittent power usage)

the point i'm actually trying to make was a 650 of that level of quality would be an acceptable PSU for your usage. so a 750 is already a HUGE overkill for your purpose biggrin.gif it's unlikely your system will hit 500w from the wall on normal gaming load.
post #9 of 22

680watt is what my 1090t and 2x 6870s do. OCs are in the description.
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post #10 of 22
Thread Starter 
Speaking of how much of a beast this X750 is, I have it hooked up (arrived yesterday biggrin.gif) to my old M4A backup board, folding on my 1075T at stock speed and the fan has yet to actually spin up. Sort of LOL.

I'd imagine the 650 might be able to do it, but I still feel safer with the 750 to say the least. As far as quality, these definitely have a look and feel of excellent build quality. The AX750 might have prettier wiring, but even the cables for this thing feel tough. Very happy with it so far, can't wait to test SLI biggrin.gif
    
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