Is a 550W PSU enough?

Posted by dczk@reddit | buildapc | View on Reddit | 12 comments

I7 12700k Gigabyte RTX 3060 Ti MSI MAG Z690 Tomahawk

Thinking about the Corsair 550/650x

Thanks in advance :)

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Due-Adhesiveness6173@reddit

why? the max on it is around 290-300W?

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Catch_022@reddit

No, there is literally a post on this page where someone tried running a 3060ti on a 550w and it went poof.

Get a reputable brand, at least 700w. I have a corsair rm850x and it works perfectly with my 3080.

You don't want to get a cheap @$$ PSU and have it damage your hardware.

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Re7isT4nC3@reddit

i have 5800x and 3060ti on Seasonic Focus 550W psu and it works like charm. So that guy probably had low end psu and it was couple years old or other issue

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werdnax12@reddit

I was running my 3060 on my 500w that was 7 years old lol I'm finally replacing it though. But it's worked mostly fine 😂

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Weird_Pressure_3879@reddit

I need to replace the PSU in my PC. The faulty one is an ATV550W 120. Can I use any 550w PSU as long as it's a 120mm?

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Baconcob@reddit

550w is nowhere cutting it close, even a 2080Ti can run fine on it.

I7 12700k is 125W TDP, RTX 3060 Ti's typical gaming power consumption is 224W, theres a comfortable ~200W headroom right there for OC and power spikes.

A oversized 750W PSU is overkill as your setup will only use half that power at peak load and even then realistically both your CPU & GPU is never going to maintain 100% full load constantly unless you are running demanding simulations 24/7.It does put you in that 50% sweet power efficency spot but if your PC is mostly idle 24/7 with just a couple of hours gaming and not constantly demanding full power, the PSU is going to be very inefficient and the Corsair 550 would be more suitable for your needs.

Nvidia recommends a 600W PSU for the 3060Ti because they have to account for the extreme setups that has 12 HDDs or a no-name bad PSU.

Source: confirmed my combined CPU & GPU rated TDPs at benchmark load with an energy monitor.It turns out that my 550W PSU is overkill as my Ryzen 5 system(CPU 65W TDP + GPU 75W) only pulls 134W max from the wall and that also includes the usual stuff like fans, drives etc.

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Lilsan4444@reddit

With fans and motherboard power and all that stuff the psu would be working at like 450 watts it'll run just will have to work very hard.

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Baconcob@reddit

Installing a 450w PSU in that system would be cutting it too close when the CPU+GPU is fully stressed out leaving only 100w for the rest even though 120mm fans, SSDs only uses 3w each but then you have to account for users with older HDDs that takes up 9w and AIOs.

However in my scenario, total peak PC power didnt even reach the max rated combined CPU & GPU TDPs even with all that stuff and everything included.Sure, a 200w PSU could theoretically work but it be a worry everytime i load up a demanding benchmark or game.

It could be working at like 350w if the I7 and 3060Ti rated TDPs are just as generous as AMDs.

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Lilsan4444@reddit

Cutting it really close pc part picker says 500W so the system would prolly barely run on 550W defiently should get at least 650W. https://pcpartpicker.com/list/7qH7xH

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Lilsan4444@reddit

Any 550W psu can handle up to a 200w tdp