Multi-rail PSU with lower amperage than GPU recommends

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bippy

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Jan 10, 2013
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I have a 750W PSU that has 4-12v rails. Each rail has a 20a max and a max amperage output of 61a total for the PSU. I am trying to figure out if I need to split the GPU input between two rails or if I will be ok with using one dedicated rail to the GPU. I am also using a H100i water cooler and intend to overclock my CPU. I will also be gaming with this PC.
I am also running 6-120mm fans and 2-140mm fans throughout the case.

Are there any other issues that any of you guys can foresee with this setup?

Thanks in advance!

PSU
CPU
GPU
Water Cooler
Motherboard
 
Solution
Vic 40
That psu can power that gpu at even one rail and you could do sli on it if wanted.
The gpu only needs one pcie power connector which make it use les than 150watts,
from the evga site,


Total Power Draw : 140 Watts
Click to expand...

one rail can put out 20amps=240watts so you should be fine.

You really want to overclock that much?

For the price difference of the H100i can you buy yourself a i5 quadcore,this will do better than the pentium.You could maybe even choose something like the the hyper 212 evo in that case.
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Vic 40

Vic 40

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Oct 22, 2013
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That psu can power that gpu at even one rail and you could do sli on it if wanted.
The gpu only needs one pcie power connector which make it use les than 150watts,
from the evga site,


Total Power Draw : 140 Watts
Click to expand...

one rail can put out 20amps=240watts so you should be fine.

You really want to overclock that much?

For the price difference of the H100i can you buy yourself a i5 quadcore,this will do better than the pentium.You could maybe even choose something like the the hyper 212 evo in that case.
 
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Solution
B

bippy

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Jan 10, 2013
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Thanks Vic, just went to the EVGA site where the card is listed:

http://www.evga.com/Products/Product.aspx?pn=03G-P4-2667-KR

Confirmed the Total Power Draw was 140 Watts.

Since my rails are 20a x 12v = 240 Watts. More than enough to satisfy the card's demand on a single rail!

Sorry I like to spell things out for myself to make sure I understand it perfectly.

And I am really looking to overclock the G3258, This will be my first real attempt at overclocking with hopes to stabilize, and I didn't want to screw up a pricey cpu. Also I heard the G3258 is a pretty good option for OC.
 
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Vic 40

Vic 40

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That's alright,at least now everybody is sure. ;)





Well that's fine,but i would get a Z97 motherboard just in case you want to get a more expensive cpu to overclock with.
This H97 will not support that with an i5 4690K for instance and i'm still not sure it will with the pentium.It had asrocks "No Z OC" but if it still has that.i don't know.
 
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bippy

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Jan 10, 2013
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Yeah my main PC has a z77 with an i5-3570k, I tinkered with it and have it OC'd about 400mhz over stock with the stock heat sink, meh... I figured I could take temperatures mainly out the equation with a good water cooling solution, so I got the H100i. I have done custom water cooling in the past but it just a pita. But it looks like my motherboard might be doa now that I have everything hooked up. running through reasons why the computer wont power on and I believe I have ruled out the PSU. Fun times...
 
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Vic 40

Vic 40

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I assume that the pentium is just a side project,because i would just stick with this instead of upgrading.




If you want help with this is it better to start a new thread so more people join for help.
 
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