How much headroom when upgrading the PSU?

Evilmethod666

Evilmethod666

Evilmethod666

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I'm looking to upgrade my EVGA G3 850W. After looking at various PSU calculators, I'm pulling around 800W. (5900X, RX7900XT, AIO, multiple fans and storage devices).

Should I aim for 1000W ATX 3.0/PCI5 or maybe go higher 1100W-1300W?
 
only you can decide. what do you want? psu's are long term things youll have it for 10 yrs. (maybe)
heh. unless they have 1kW TDP graphics cards before then.

1000W is enough. more if you want.
there is an optimum efficiency curve..usually somewhere around 60-ish percent of max capacity of the psu. guessing from eyeballing the efficiency curves...
 
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Evilmethod666 said:
I'm looking to upgrade my EVGA G3 850W. After looking at various PSU calculators, I'm pulling around 800W. (5900X, RX7900XT, AIO, multiple fans and storage devices).

Should I aim for 1000W ATX 3.0/PCI5 or maybe go higher 1100W-1300W?
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A stock 7900 XT won't be using 800 watts, but if you're going to trouble of upgrading a decent unit, I'd get 1000 or higher. Worth keeping in mind that if you have a 3x 8 pin card (like the Nitro) getting 3x PCIE 8 pin AND 2x EPS12v can be tricky with ATX 3.x PSUs.
 
Tetras said:
A stock 7900 XT won't be using 800 watts, but if you're going to trouble of upgrading a decent unit, I'd get 1000 or higher. Worth keeping in mind that if you have a 3x 8 pin card (like the Nitro) getting 3x PCIE 8 pin AND 2x EPS12v can be tricky with ATX 3.x PSUs.
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Is it possible to use two PSU's? Have a 650W from a old 939 build, so say if I had two 500W, which is borderline with new gaming rig then two 500W could be used? ie one PSU just for GPU and the other for everything else.

My main PSU is 750W so should be plenty, but something to think about
 
hornetstinger said:
Is it possible to use two PSU's? Have a 650W from a old 939 build, so say if I had two 500W, which is borderline with new gaming rig then two 500W could be used? ie one PSU just for GPU and the other for everything else.

My main PSU is 750W so should be plenty, but something to think about
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Yeah, you can, you can buy adapters to help turn them on and some cases support two like Corsair's 9000D/1000D.
 
Evilmethod666 said:
I've ordered a MSI MPG 1000w PCI5 PSU, which should give me plenty of future-proofing over the next few years.
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Updated news, the MSI MPG 1000w PCI5 PSU is now out of date as ATX 3.2 standard is released, with slightly different PCI-E GPU connector, with dual hi power connector, and a 8 + 8 + 8 pin for the CPU socket.

sorry about that.
 
Evilmethod666 said:
PCI-E GPU connector - Is that the 8-pin connector on the bottom of the MSI X870E boards?
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I've never heard of ATX 3.2, I assume that it is a typo for ATX 3.1. PSUs that are ATX 3.1 have an updated 12VHWPR cable (12/16 pin) for nvidia GPUs, which is known as "12v2x6". Many older PSUs have been silently updated and now include this cable too.
 
Tetras said:
I've never heard of ATX 3.2, I assume that it is a typo for ATX 3.1. PSUs that are ATX 3.1 have an updated 12VHWPR cable (12/16 pin) for nvidia GPUs, which is known as "12v2x6". Many older PSUs have been silently updated and now include this cable too.
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Winding him up, that his brand new up to date PSU is already out of date, obsolete and replaced with new standards that make his unusable with new hardware :D
 
Evilmethod666 said:
I've ordered a MSI MPG 1000w PCI5 PSU, which should give me plenty of future-proofing over the next few years.
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I think If I ever found that 1000W wasn't enough, I wouldn't question my choice of PSU, I would question what the hell I was actually doing needing more than 1000W to play games - at that point IMO, something isn't right.
 
Apex said:
I think If I ever found that 1000W wasn't enough, I wouldn't question my choice of PSU, I would question what the hell I was actually doing needing more than 1000W to play games - at that point IMO, something isn't right.
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yeah power consumption for gaming PC's is getting out of hand. Not like electricity is cheap either
 
Apex said:
I think If I ever found that 1000W wasn't enough, I wouldn't question my choice of PSU, I would question what the hell I was actually doing needing more than 1000W to play games - at that point IMO, something isn't right.
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I'd assume it would reach the limits of how much heat regular coolers/cases can exhaust too :o

...though on the plus side, you could heat your house by playing Cyberpunk.
 
Very few builds require 1000w+ psus...
Good quality 750, or perhaps 850 is fine 99% of the time.

People seem obsessed with over specking PSUs...
 
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