Is a 650w platinum PSU enough for a 3080

[Oreo]

So I’m thinking of getting a 3080 and replace my current 4060, but I don’t know if a 650W PSU is enough. Here are my specs
I5 12600kf
32gb ddr4 Corsair dominator ram
TUF gaming Z790-PLUS Mobo
650w EVGA platinum rated PSU
1tb 980 pro with heat sink

[humboldt]

simply no. you need minimum 750 watts. i looked up nvidias homepage. i would buy at least a 850 watt psu by seasonic or bequiet.
my2ct.
thanx for reading.

[Jonzuk]

get 1000 watt just to be safe incase you want more hard drives/ram/upgraded CPU/etc I got one i thought was enough until I started overclocking and adding a few more things into the PC that require more power

[Jonzuk]

Also you can put all the parts onto PC Part Picker and it will tell you how much wattage is used and if itll be enough for your setup/potential future setup, Happy Gaming! Consider checking into AMD RX GPU's aswell if Raytracing or CUDA Cores aren't important for you

[smokerob79]

what 3080???.....some only have 2 8 pins and dont draw more then 375 watts......like my EVGA XC3 3080......

oh....yeah i just looked up your CPU.....without overclocking you could draw as much as 224watts CPU side.....you would be really close and might have issues under full load.....

I know people with 3080's on 650watt PSU's BUT they all have AMD CPU's and low power draw ones like 5600x3D's or even 5700x that only draw 126watts hitting boost clocks all cores.......lack-of-intel strikes again!!!

[Tonepoet]

You could probably it off. Corsair's recommendation is to add up the T.D.P. of the two core components[www.corsair.com], then add 150 for everything else then 150 for upgrade and efficiency overhead. That last 150 isn't strictly necessary going by the purposes broken down in their recommendation article. It's just for upgrade overhead and efficiency.

The T.D.P. of the 12600k is 150, and the T.D.P. of the 3080 is 320.

150+320+150 (for other components) is 620.

Nvidia probably expects a 3080 user to be using a higher class

I wouldn't worry much about power excursions. Power supply ratings are supposed to be representative of sustained load, and peak power handling for momentary 10 milisecond excursions is generally supposed to be 30% higher than what's written on the supply before it trips. That's a rule of thumb, and power excursion standards were not introduced until A.T.X. 3.0 and P.C.I.E. 5, so I can't guarantee every supply will adhere to that rule, but even Thermaltake's cheapest power supplies have been shown to handle more than that.

I'd recommend going with a 750 watt supply if you're buying a new one though. You're pushing right up against that 600 watt limit with your configuration and Nvidia's recommendation is 750 watts, Granted the math is probably based on an i9 processor though. The 12900k is a 241 T.D.P. processor for example,

150+241+150=711

Power supplies are generally rated in 50 watt increments, so any amount over 700 but under 750 would result in a 750 watt power supply recommendation.

I wouldn't actually worry too much about the efficiency loss. A P.S.U. is most efficient at 50% load, but aiming for a higher 80+ rating works out to be just about as efficient if not moreso than running at 50% load anyway, so if you're not concerning yourself with power ratings you're not concerning yourself with running the system at 50% load either.

[smokerob79]

Publicado originalmente por Tonepoet:

You could probably it off. Corsair's recommendation is to add up the T.D.P. of the two core components[www.corsair.com], then add 150 for everything else then 150 for upgrade and efficiency overhead. That last 150 isn't strictly necessary going by the purposes broken down in their recommendation article. It's just for power and efficiency.

The T.D.P. of the 12600k is 150, and the T.D.P. of the 3080 is 320.

150+320+150 (for other components) is 625.

Nvidia probably expects a 3080 user to be using a higher class

I wouldn't worry much about power excursions. Power supply ratings are supposed to be representative of sustained load, and peak power handling for momentary 10 milisecond excursions is generally supposed to be 30% higher than what's written on the supply before it trips. That's a rule of thumb, and power excursion standards were not introduced until A.T.X. 3.0 and P.C.I.E. 5, so I can't guarantee every supply will adhere to that rule, but even Thermaltake's cheapest power supplies have been shown to handle more than that.

I'd recommend going with a 750 watt supply if you're buying a new one though. You're pushing right up against that 600 watt limit with your configuration and Nvidia's recommendation is 750 watts, Granted the math is probably based on an i9 processor though. The 12900k is a 241 T.D.P. processor for example,

150+241+150=711

Power supplies are generally rated in 50 watt increments, so any amount over 700 but under 750 would result in a 750 watt power supply recommendation.

I wouldn't actually worry too much about the efficiency loss. A P.S.U. is most efficient at 50% load, but aiming for a higher 80+ rating works out to be just about as efficient if not moreso than running at 50% load anyway, so if you're not concerning yourself with power ratings you're not concerning yourself with running the system at 50% load either.

nice work but what about current draw on his CPU with a overclock???.....this is were i see issues....again working with people already running 3080's on 650 watt PSU's its doable but his CPU is really on the line do to how much it draws even stock.....and stock was 224 not 150.....

[Tonepoet]

I mean straddling the line as such I would say no to overclocking. Probably not a good idea with L.G.A. 1700 parts anyway. Alder lake runs at lower wattages than Raptor Lake, which may be the main reason those chips aren't as suicidal as raptor lake.

Truth be told, I'd probably say O.P. would be better off buying a 7700 XT than a 3080. The T.B.P. of the 7700 XT is only 245 and the cheapest 3080 I can find from a seller I find even somewhat trustworthy is $400, and of course it's likely to be considered as secondhand product so no warranty. There are cheaper offers for the 3080, but those are either on auction or from sellers with zero ebay feedback with too good to be true pricing, so those are likely to be scammers. Ebay often doesn't even let those transactions go through even if you are willing to take the risk. They send you some message about how the listing was delisted because it was likely to be a scam weeks later and that you should be getting a refund, and to file a dispute if you don't.

At the $400 price point you can buy brand new 7700 xt[www.newegg.com], which ranks higher than the RTX 3080 on the Tom's Hardware G.P.U. hierarchy[www.tomshardware.com], consumes less power, and has more V.R.A.M. Since its a new part being sold by an approved vendor, you should be able to get warranty service pretty easily too.

Edit: Apparently that's only true at 1080p medium. At higher resolutions and higher settings the 7700 xt falls behind. That's what I get for being lazy with checking I guess.

[Oreo]

If I don’t go for a used 3080 ima try to find a card that’s around 500ish, anyone got any card other than a 7700xt?

[Tonepoet]

A 7900 G.R.E. for $530 is easily the card of choice in that case.

(Never mind. Link didn't work and apparently it's no longer available.)

[Rumpelcrutchskin]

Publicado originalmente por Oreo:

If I don’t go for a used 3080 ima try to find a card that’s around 500ish, anyone got any card other than a 7700xt?

https://pcpartpicker.com/product/mHpQzy/gigabyte-gaming-oc-radeon-rx-7800-xt-16-gb-video-card-gv-r78xtgaming-oc-16gd

[Tonepoet]

7800 XT traditionally hasn't been considered a good purchase since it didn't move the dial enough against the 6800 xt or even the 6800. Also, I imagine we're willing to buy secondhand in this case since I don't think the 3080 is available brand new.

In accordance to the Tom's hardware G.P.U. hierarchy the 6950 XT matches the 3080 at 4k ultra and it gains lead over the 3080 at lower resolutions and settings. Might be preferable since it has 16 gigs. of V.R.A.M. instead of just 10 or 12 like the 3080, and we're definitely looking at V.R.A.M. being more important next generation.

You can get it at $500 off of ebay[www.ebay.com] from a seller with 11088 ratings, 99% positive feedback, more than 10 in stock and free 3 day shipping. A 7900 G.R.E. is a slightly better performer and more electrically efficient though.

Honestly though? Just hold off. A.M.D. confirmed 8000 series G.P.Us. to launch at C.E.S.[www.techradar.com] next month on Jan 6th. Both an 8800 and a partner G.P.U. A.M.D. already claimed they wren't making a flagship class product this generation, so I'd imagine that the partner card is likely to be a lower S.K.U. that will be within your price range, and a next gen. card will be more electrically efficient than older cards of the same perf. level, making the P.S.U. less of an issue.

Jan 6th is just enough time that if they hit shelves two weeks after the launch, that it should be a couple of days ahead of Trump's Inaguration, so launch prices should be unaffected by tariffs that don't exist yet.

[smokerob79]

I agree with the idea of changing out for a AMD card....7900GRE would also work with your PSU without any issues no matter what you do even over clocking.....black friday i got a 7800xt for someone at 380 bucks.....but anything over 400 bucks for one NEW is not worth it.....

[r.linder]

With a 65W TDP Ryzen CPU, 650W would be fine. But anything more than that from Ryzen or a modern Intel K SKU will have too much power draw.

NVIDIA recommends 750 watts but that's with a high end processor from 2020 era like an i9-10900K or Ryzen 9 5950X. 12900K, 7950X, etc. draw a fair bit more power than that so 850W would be more ideal.

[Trout]

you can pull it off if the efficiency is good enough but just barely, i agree with getting a beefier PSU just to be safe

[_I_]

Publicado originalmente por Trout:

you can pull it off if the efficiency is good enough but just barely, i agree with getting a beefier PSU just to be safe

not really
pc power supplies are rated by their output not input
80+ is just the efficiency on input vs output, nothing more