What psu for my rig?

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Billiam1391

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Im upgrading my gpu to 2 gtx 780 sli and have an i7 4770K OC to 4.4Ghz and an H80i Watercooler and am wondering what psu to get so im not missing out on anything?
 
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loc chuong

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A PSU with at least 850W
Are you on a budget?
 
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Billiam1391

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id like to say no. i have a HX 750 already its just i dont want to mess up my new cards when i get them if that would be a problem?
 
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Billiam1391

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and will 850 defo be ok cause my psu is brand new really didnt think of getting 2 780 till last week so i want to make sure they will do?

 
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loc chuong

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what exactly is a defo?
 
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loc chuong

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850W should be fine. I did a PSU calculator on your GPU on SLI and it only needed around 650Watts. So 850Watts should give it enough room.
 
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loc chuong

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If you bought only 750, what if you wanted to add something? You might run out of Watts. Also, if you plan on overclocking than that will even drive more power.
 
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Billiam1391

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i was going to crossfire my 7950 but decided the other day to get the sli 780 for performance for next gen games because i have a 3 monitor set-up. i don't plan on OC and have no plan of any more upgrades atm.
 
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loc chuong

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Just go with 850Watts. Its a much safer choice.
 
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loc chuong

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looks fine to me
 
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loc chuong

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Normally, you would plug a 4 Pin ATX12V wire from the PSU into the Motherboard. But if the PSU has a 8pin EPS 12V wire that you can plug into the motherboard you should use the 8 pin one. It provides more power

This website shows you a picture of both: http://www.hardwaresecrets.com/article/Everything-You-Need-to-Know-About-Power-Supplies/181/3

I'm pretty sure you can use a 4 pin atx12v and plug it into a 8 pin EPS 12V slot on your mobo. Most mobos i see now a days have 8 pins.
 
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loc chuong

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Can you link me to your mobo
==============================================================================
Also, you plug the 4 pin(atx 12v) or 8 pin(EPS 12v) wire from the psu into the CPU Power Connector. Which is usually 8 pin so that both atx 12v and eps 12v will work :p.

Look at this mobo for example. Click on the picture with the aerial view that has words pointing to it. You should see the CPU Power Connector

http://www.newegg.com/Product/Product.aspx?Item=N82E16813128591
 
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loc chuong

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Well i was mistaken, if its 8 pin(EPS 12v) you have to have an 8pin EPS 12v wire from the PSU
 
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