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Ampere on laptops isn't as impressive over Turing on laptops because they can't jack up the TDP like they can on desktop. That's the only reason these cards are so much better in actuality. Everything was engineered specifically to efficiently raise the bar so they could really push it and try to stop AMD from winning.
Most models are 320w its only the top models, usually with 3 8 pins that have the higher power limits out of the box.
https://www.overclock.net/threads/official-nvidia-rtx-3080-owners-club.1753932/
You all act like its all about average power and none of you account for power spikes. You claim that I need to measure from the wall, despite such measurements being known not to catch or show the types of spikes that GPU's commonly cause on ther 12v rail that trip OCP and cause system instability through micro-bursts in demand.
Coming from someone who had that last GPU Power Hog King, a Vega 64, which pulls 330 sustained with *known documented* bursts of power draw of up to 100+a on the 12v rail (well above what most 900w PSU's offer). Spikes that last in the milisecond range, that are *only* visible with micrometer testing on the GPU power board, and that were documented to trip multiple repected brands including seasonic.
Nothin has touched that type of loading except Vegas. Till Now. Which is why such stability issues were so prevelant on Vega and part of why those that run Vega 64 or VII models daily regularly recomend to others to use "overkill" PSU's...
And now we have a situation where basically every single 3080 is a Vega64 *or worse* in power draw. Same for the 6900xt and some 6800xt.
And just like with Vega, you can use a "good" 750-850, for benchmark use, for a week or two, and it will be OK and oyu might see one crash here or there and rack it up to a quick and dirty bench build (think a reviewer)... But in daily use you will have issues. Over the course of day in day out varried use for 3+ months you will find that stability is not there.
Go read up on the tech support reddits on both Red and Green team, there is a *clear* correlation between users with 3080/6800xt and above and 850w PSU's and below having "stability" issues. Many (though not all) will report their issues fixed when they opt instead for a high end 900-1200w unit, with most going for a 1kw units.
Anyone on a 3090 or better should be on 1KW... I mean, I know out of the people quoted above that at least Monk is running a 3090... You telling me you *dont* have it on a high end 950w or better?
^^^And exactly this^^^ And chances are you can probably extend that power limit a touch via OC'ing. Fact is I dont know many (if any) 3080 users that are not "tuned" and pulling above stock TDP. A 750/850 will be stable enough... Till its not. When you find over the course of a few months that you get random reboots under sustained loads where it works for awhile then shuts down. You will know why.
Alternative to the 3070 consider the 6800 (non xt) it is comparable to 3070 in power draw, stonger in traditional render and about equal in RT (or a bit behind depending on RT load). Depending on market it can be harder or easier to come by. Or go for the 3080 and just get a decent PSU, they are not that pricey if you look around and read up on reviews!
Rtx 3080 is 30 to 40% more powerful than 3070, also comes with 10GB memory. If the OP can afford a $1000 Graphics Card, he can also afford to spend $120 more for a good 750 watt GOLD psu, instead of using that mediocre Bronze PSU in this new hIgh-end rig.
Dont get me wrong, i agree there could be issues and right there are people have issues. I bet less issues on high quality 750/850 and more on lower end quality. I also total agree someone who has money to buy 3080/3090 should never ever cheap out on low bronze psu. Gpu will cost over 1000 bucks and 120 - 150 bucks for a good gold psu is mandatory.
I also think Escorve is right, if a whole system pulls only 450w-500w a quality 750w should be more then enough even for powerspikes a 3080 will produce. I saw igors lab videos about this too and he said the same.
Op stick with the 3080 if you can afford it, it is notably better than the 3070 and worth the extra, just, if you have problems THEN buy a new psu, no need to spend money when you may not need to.
People on this forum have a bad habit if spending other people's money, when they don't follow their own advice, not pointing at anyone in this thread, just in general, while those of us with crazy high end builds tend to be the ones that push for spending money more carefully, which I find very strange.
Yeah, if you don't have a psu I 100% agree, but it seems op (and alot) already have 650w psu's.
Tru dat