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Neither the 7900XTX or the XT version will use the new ATX 3.0 connector so you don't have to worry about that at least
im looking at the power draw of all of my components, but i swapped the 2080 with a radeon 6950xt because apparently the 7900xtx draws the same amount of power
power supply calculator recommends 700-800 watts
but apparently the 6950xt manufacturers recommends 850 watt psu's for most aftermarkets. some even higher.
on pcpartpicker with my entire build including extra case fans, with the 2080 swapped with an asus strix 6950x (i always buy the asus strix models) it estimates the wattage of 619 watts. but thats with my 11700k cpu only drawing 125 watts. everything is unlocked on my motherboard, and the cpu power limit was disabled and it can supposedly hit up 300 watts straight out of the box! - even though ive never quite got it that high even on the most brutal torture tests ive got it around 230.
theres a way in the bios that i can limit the cpu power draw to a value i set, but i prefer to leave everything as it is because it runs beautifully as it is. with that being said, i'll add another 125 watts to the 620 watt estimation on pcpartpicker just to make up for the power starved cpu, and that oughtta bring me up to 745 watts. mind you the most my cpu only runs 80-140 watts tops,, but if my cpu is gonna be working harder or running avx workloads, it will likely draw more cpu power
i have no idea, but it seems as if if i'm cutting it real close. my only solution would be to limit the cpu power draw to around 150-200 watts. and that should bring my whole pc to draw around 650-700 watts. i really dont know if thats an ideal solution, but then i could keep my cpu in check and still give it some room to breathe and i'll still be able to keep it running 4.9 ghz on all cores, which it seems to achieve quite well at stock even on a much lower power draw. i think the only reason i can even achieve this is because the noctua dh-15 is a beast of an air cooler.
dont get me wrong, the 11700k is a more than capable cpu, but man it can really draw power. under extreme stress tests its capable of hitting 300 watts on its own if not kept in check. thats insane for a cpu, compared to AMD's 5800x which was roughly the same in performance but only draws like 110 watts, and is limited to a max 142 watts tops. the 11700k got shit on in reviews because nobody would review it for performance which it excels in. they would just compare it and then write it off to the 5800x which was quite a bit cheaper, would run alot cooler, and sucks a whole lot less power in exchange for just a smaller hit in performance.
either way i feel like i'm really cutting it close. i should have went with the 5800x and i'd be laughing, but i didnt care about the extra cost at the time, i just wanted more raw performance for gaming and even emulating, and the 11700k pulled ahead of the 5800x at the time. i wasnt going to go for any higher components or i probably would have gone for the 5900x cpu, as the 11900k is a joke of an "upgrade" over the 11700k, and the 12 gen intel cpus werent quite ready at the time
but oh boy. im gonna have to wait and see here. something tells me i might have to bite the bullet and get a new psu anyways. ahh fuck it im not gonna worry about it..im just gonna play me some diablo 2 resurrected this morning. the fuck do i need a gpu upgrade to play a 20 year old game? well not really but lol i aint gonna dwell on it. though i'm sure a 7900 xtx would be an ideal solution for 4k 60fps or 1440p 120 fps. i have a 120hz display that is totally up for the task, but my 2080 is starting to show its age when i need to start turning a few settings off to achieve that target in a bunch of my games these days. i'm sure a 4080 or 7900 xtx would be more then enough to destroy that for quite a few years to come.
i think im just gonna have to wait until the card hits the market and the reviews to come out and see what others are saying. surely theres gotta be someone else out there who is crazy enough to pair a 7900 xtx with a 750 watt power supply, and an extremely power hungry 11700k. maybe i'll let them bite the bullet and see what the end result is rather than to try it out for myself.
i've already had enough random experiments, deciding to originally upgrade my 970 with a 2080....on an old i5 4690k haswell setup. yeah, after a couple years of cpu bottleneck city, i started to realise why i couldnt find anyone with completed builds on pcpartpicker that paired a 2080 with a 4690k! a while ago i finally gave my 2080 a proper home and threw the 970 back in the old pc. i'll wait for someone else to do this kind of weird combination with the 11700k+7900xtx+750 watt psu and then i'll ask them how its going.
i really didn't think i'd ever need more than a 750 watt psu for anything, but here we are
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