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what is our bottleneck?

Dumphole

Dumphole

Dumphole

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Joined
28 Dec 2015
Posts
215
Hi all,

My brother and i both have the same gpu, a zotac 4080 but I have a 5800x3d and he a 9900k. My belief was that they're not drastically different yet we're seeing vastly different fps in game. When playing mc with seus shaders I often see 40 or so % more fps than he with lower gpu usage whereas his gpu is at 100% and with lower fps.

My first thoguht was cpu bottleneck but given I'm rarely above 20% cpu usage in MC I struggle to believe thats it. Is it a chipset bottle neck? Why am I getting such better FPs than he is?

Thank you all.
 
Im not sure how much faith I would have in the cpu % usage figures.

The fact is the 5800X3D is the stronger gaming cpu and you would expect to see more fps in games in general.
In some cases vastly superior due to the 3D benefit.
 
Too many variables to work out here bud. Peripherals, drivers, memory, power delivery, cooling, motherboard etc. Could even be a combination of factors. Test each rig as barebones as you can even 1 stick of memory and one ssd
 
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He's your brother. Just lol at him :D

Yeah a bit more info is needed. What resolution and what are the other specs and games your playing.

You ram could be moch better. Low resolution will put more use on the CPU. Are you on a SSD and he's on a HDD? There's more than just the CPU to think about
 
Dumphole said:
I get you, but it's not twice as good which our fps difference would suggest.
Click to expand...

It is quite a lot faster though :)

AFAIK, Minecraft isn't *that* threaded, at least not for it's graphics engine. Suspect you see 20% because it's only using a couple of cores when it's not generating terrain, but those will be maxed out. The 9900k will also use the same number of cores, but they will definitely be slower. If I remember right, 5800x has something like 40-50% IPC advantage, plus you have the X3D and that's quite possibly uncharted territory for Minecraft. Might be it responds really really well to that cache.

Possibly memory related as well? I'm guessing his 9900k has older/slower ram. Same amount of the stuff?
 
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One of you is running one of the best gaming processors ever made, holds it own vs much newer and more expensive CPUS, and the other one isnt :) - In some games the difference is astronomical.
 
eddiew said:
It is quite a lot faster though :)

AFAIK, Minecraft isn't *that* threaded, at least not for it's graphics engine. Suspect you see 20% because it's only using a couple of cores when it's not generating terrain, but those will be maxed out. The 9900k will also use the same number of cores, but they will definitely be slower. If I remember right, 5800x has something like 40-50% IPC advantage, plus you have the X3D and that's quite possibly uncharted territory for Minecraft. Might be it responds really really well to that cache.

Possibly memory related as well? I'm guessing his 9900k has older/slower ram. Same amount of the stuff?
Click to expand...
Yep, 5800x3d IPC is massively better than 9900k. An old game like minecraft I'd assume is CPU limited.

Wing-Man said:
really? its that fast?
Click to expand...
In games, yes, a 5800x3d really is *THAT* fast. I'm not saying it's an equivalent cpu to a 12900k but for relevant use cases it's ultra-quick, an intel from a few generations ago is going to be left in the dirt on a 4080 unless they are playing super high resolution with AA etc.
 
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