650 W or higher power supply

Zach_01 · Oct 12, 2019

wolar said:
I recommend having some overhead, sure less w would suffice but the optimal efficiency range of a psu is around 70% and it doesn't hurt to have the extra power if u ever want to do more, also the price difference isn't high enough to warrant not going for more watts than required.

Yes I agree on the overhead. I would say keep it to 60~65% load max for optimal efficiency. For a 550W PSU that is at 330~355W power draw. And the OP's system would draw that with light OC. No OC will draw less that 300W.

refillable said:
No, modern PSUs are most efficient at the 30-50% range.

Its more like 40~60% or 35~65% with 50% to be the very top.

This is a Gold rated (90~91% peak eff) Corsair RM750

blog_how-to-build-a-pc---the-power-supply-Content-6.jpg

JC316 · Oct 12, 2019

I've been rocking an FSP Aurum CM 750W Gold certified power supply for about 6 years now. Never skipped a beat in that time.

refillable · Oct 12, 2019

Zach_01 said:
Its more like 40~60% or 35~65% with 50% to be the very top.

I'm curious where you got that image from. From ages, Aris Mpitziopoulos has always produced efficiency curves akin to the one above. Anandtech does as well and maybe many others. Some PSU stretches to 35-55, 35-60, or 30-60, but most are on 30-50. The 550 W RMx, for example, is about 35-60. It's for the old 2016 version, though.

Jetster · Oct 12, 2019

The better the PSU the higher the efficiency is in the curve. But it will cost you

https://seasonic.com/prime-ultra-titanium

Platimax 1350 Watt 80 PLUS Platinum Full-Modular Power Supply - Products - ENERMAX Technology Corporation

Platimax 1350 Watt 80 PLUS Platinum certificated full-Modular power supply, 100% 105℃ Japanese electrolytic capacitors.

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GorbazTheDragon · Oct 12, 2019

You lot are really splitting hairs on this efficiency thing... This is a matter of under 5w difference at full load...

You could save yourself that amount of power by being very picky about what VRMs you use on your GPU but I don't see anyone up in arms with multi page threads about GPU and motherboard VRM efficiency...

n-ster · Oct 13, 2019

Another vote for RM550x

potato580+ · Oct 13, 2019

n-ster said:
Another vote for RM550x

whats rm550x :confused:

okey nevermind it is corsair model number

refillable · Oct 13, 2019

GorbazTheDragon said:
You lot are really splitting hairs on this efficiency thing... This is a matter of under 5w difference at full load...

You could save yourself that amount of power by being very picky about what VRMs you use on your GPU but I don't see anyone up in arms with multi page threads about GPU and motherboard VRM efficiency...

I don't see anything wrong with this nor with being very picky with GPU VRMs. GPU VRMs are hard to tell apart, no one does such things reliably. Having no one "up in arms with multi-page threads" isn't a good counterargument to why we shouldn't do this.

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650 W or higher power supply

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