Looking for a CPU to pair with a 4090

[PaulW]

Looking to pair a CPU with a 4090, but which ones should i get? here are some of my concerns at the moment.
Top priority is 3D work Blender , Maya, UE5 followed by gaming. Power consumption , cooling and running cost are also in my mind. the 4090 is already power hungry and expensive.

7950X3D - too expensive and a little fiddly with how is operates.
7950X - Performance king but runs hot ( Bills )
7800X3D - Great for games, cheaper, concerned 8 core / 16 T will be not great for production and may bottleneck the 4090 / could be bad for production tasks (my guess???) Not out yet
7900X3D - Bad reviews, not great for productivity apps

Intel - run cool at idle but runs very hot with tasks, better for gaming though
AMD - Runs hotter at Idle than AMD, but runs cooler and has better performance than the intel's for production ( clarify this please

Which one suspect i will mostly be doing the heavy lifting with the GPU so is a slower CPU a wise option?

Thanks

Paul

 

[PaulW]

Seems pretty important to clarify what tasks you're doing are using what

Hey thanks for the info.
rendering in Blender would be done with the GPU,
UE5 would be the same
i may doing some video editing in the future. i know premier uses mostly the CPU but for effect relies on the GPU. but would probably use Resolve in future which relies more on the GPU from what i have heard
PS / Affinity apps probably wont be much of a issue either way.
Zbrush and sculpting app in probably CPU and Ram heavy
i think in the long term probably the power bill as i wouldn't be doing production work 24 / 7 . bills are a thing but i am more concerned about getting a CPU and an expensive graphics card and regretting getting a CPU that would limit it when doing production tasks.

i think i am trying to find a balance with a lot of things, probably over thinking it.

 

[PaulW]

i think the 7950x3d is to expensive given my budget. i was orginally going to get a 7950x3d + a 4080 but i think the non X3d version is a better option as its normally on the tope of the production benchmarks and is considerably cheaper than the 7950x3d. the reason i wanted to go with a overpriced 4090 is that the 4080 is even more overpriced than the 4090 for its specs. This way if i get a cheaper CPU and less flashy other components i can afford a 4090 in my build which will be much better for my 3D work and gaming longer term.

I'd definitely buy the 7900 non-X

i think this might be a good option as its getting good reviews from GamersNexus and the power and efficiency seems really good and is not that far off the 7900x version. its also much cheaper than the 7950x3d. i'll still wait for the 7800X3D to come out and see the reviws and how it performs to this.

 

[PaulW]

I run my 7950X in ECO 65W, it idles at ~30C and mostly stays < 50C with high all core loads. High single threaded loads hit ~65C at 5.775GHz. It uses a max of 90W and performance is still great. For my work I use a lot of software that’s all connected so having 16 cores helps a lot, but the cores don’t get hammered at 100% for long so the average frequency is still well above 5GHz most of the time. The X chips will beat the 3D versions for most production tasks. Gaming is one of the few areas where the 3D versions shine. For me, I build a PC for work and then add a GPU so I can play games as well.

good advice Fred, thanks. how easy is it to underclock these chips is the only way through the bios? or does AMD have software to easily do this?

 

[PaulW]

in ECO 65W

i read that running it at 105w is the sweet spot can this be done in RM as well?

 

[PaulW]

as you already have a 4090

i have not bought a 4090 yet. it's one option.it makes sense to get this based on what i fundemteally do. the other option is a 4080 but compared to the 4090 bang for buck its overpriced. if there was a good proce cut on it i'd deffo consider it.

 

[PaulW]

what about the 7800X3D? i know its not out yet but do you think it would be a bottleneck for the type of work i do?

 

[PaulW]

I think this would be a perfect fit

i'll wait for the reviews of course, however it depends on the price as well. I am Still concerned it may bottleneck things with having so few cores, although I am not sure why i am worried when i am replacing my 10 year old processor Intel Core i7 920 2.66Ghz (Nehalem) with this. i guess i just want to make a good choice.

 

[PaulW]

Can I jump on this thread if I may?

Be my guest, more the merrier, everyone is here to help that's is why its such a good forum. i hope everyone can help you out with your decision as well.

 

[PaulW]

7800X3D is going to be £100-150 more than the 7700X

i think i can afford that with my budget. i am either going to get the 7800X3D or the 7950X. This will depend on the price and reviews of the 7800X3D when it is out in two weeks time.

 

[PaulW]

wont be getting one for a few months

i've not built a new rig in 10 years i can wait a month or two. surprised this one is still going tbh.
in saying that with AMD holding these chips back, obvious the main aim was to get everyone who could not wait to buy the 7950X3d and 7900X3d. That may of also given AMD time to get more 7800X3D units manufactured. so supply might be not as bad as it could be.