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Which PSU for OC & SLI system?

Gerr
By Gerr
in Power Supplies
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Posted

My current system has a 7700K OC'ed to 5.0Ghz with an OC'ed GTX 1080.  My PSU is a 3 year old Season G-750W and has been running just fine.  Recently I bought a pair of GTX 1070 Ti's that I plan on using in SLI and OC'ing as well.  Most PSU calculators place my total usage at 700W-750W.  I don't have the funds for a new PSU, but I recently got a used EVGA G2 750W in a trade and the owner says it was used for less than a year and not heavily.  However, I have no way to verify what he said.

 

My question is which PSU would you recommend I use:

3 year old Seasonic G-750 PSU originally bought new by me with average gaming use.

1 year old EVGA G2 750W PSU bought used and claimed light use.

 

 

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Posted
8 minutes ago, Gerr said:

Most PSU calculators

Are totally inaccurate. A 1070 ti will not draw over 250 watts, so at the absolute max you're at 500 watts with the cards, and the CPU will doubtfully reach 200 watts, I think your current PSU is fine

I WILL find your ITX build thread, and I WILL recommend the SIlverstone Sugo SG13B

 

Primary PC:

i7 8086k - EVGA Z370 Classified K - G.Skill Trident Z RGB - WD SN750 - Jedi Order Titan Xp - Hyper 212 Black (with RGB Riing flair) - EVGA G3 650W - dual booting Windows 10 and Linux - Black and green theme, Razer brainwashed me.

Draws 400 watts under max load, for reference.

 

How many watts do I need? ATX 3.0 & PCIe 5.0 spec, PSU misconceptions, protections explained, group reg is bad

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Ähm, you already have a PSU, why not test it?


For SLI/CF you absolutely NEED some kind of Power measuring device to see if CF/SLI is active or not.

"Hell is full of good meanings, but Heaven is full of good works"

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I’d just use the current one. Unless it can’t support the connections. I’d do 750 at a minimum as I hate hearing the psu fans struggle. But if you’re on air, i doubt you’ll notice. 

Main RIg Corsair Air 540, I7 9900k, ASUS ROG Maximus XI Hero, G.Skill Ripjaws 3600 32GB, 3090FE, EVGA 1000G5, Acer Nitro XZ3 2560 x 1440@240hz 

 

Spare RIg Lian Li O11 AIR MINI, I7 4790K, Asus Maximus VI Extreme, G.Skill Ares 2400 32Gb, EVGA 1080ti, 1080sc 1070sc & 1060 SSC, EVGA 850GA, Acer KG251Q 1920x1080@240hz

 

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