CPU bottleneck ? or something else? 3900 / 8700k / RTX 3080 10gb

[geordiejc]

I have a Ryzen 3900 (non x) the 90w limited CPU paired with an RTX 3080. In some games, i think the CPU is holding my GPU back when looking at the GPU utilisation. The reason i think this is, in most games, the GPU is never pegged at 99% it's between 75% - 95%

My conclusion so far is that in games, the ryzen doesnt have the IPC & Frequency (4.1Ghz) to feed the GPU.

e.g.
Oblivion Remastered 92% GPU utilisation

e.g.
V rising 75% GPU utilisation

I have a 8700k and a 1080 ti. I'm considering putting the RTX 3080 into the 8700k system and seeing what happens.... before i do, do you think i would see an improvement ? Something aint right! any help appreciated. Is there something im missing here... i feel stupid.

 

[Tetras]

before i do, do you think i would see an improvement ?

I doubt it, there wasn't a big difference between those CPUs. You just need a new CPU (like the 5700X3D) to get the best out of the 3080, or to whack up the settings higher.

 

[geordiejc]

In v rising i have everything maxed out, so the CPU is definitley the bottleneck and im not missing something ? I did consider the 5700x3d it seems a crackin' CPU for the money.

 

[Tetras]

i have everything maxed out

What res?

 

[hornetstinger]

How does that compare to yours?

 

[geordiejc]

What res?

1440p matey

 

[geordiejc]

How does that compare to yours?

I could match the settings, but he's using 4k , i couldnt compare AFAIK. Thank you for sharing though.

 

[hornetstinger]

No he's using various settings and res, down to 1080p.

 

[geordiejc]

No he's using various settings and res, down to 1080p.

I see apologies. i'll have a go now.

 

[hornetstinger]

That's pretty decent fps, is that maxed out, no frame gen no scaling? (Oblivion) I'm getting 75fps with 9070xt.

 

[geordiejc]

That's pretty decent fps, is that maxed out, no frame gen no scaling? (Oblivion) I'm getting 75fps with 9070xt.

custom setting betweeen medium/high s/w RT. no DLSS, it doesnt 'appear' to give me any more fps if i use it just lowers the wattage and gpu utilisation... i forced transformer model too and didnt change much....

No upscaling

DLSS Balanced

 

[jigger]

Yeah, the CPU probably is limiting 3080 to some degree. Nvidia cards don’t scale particularly well with cores count and the Nvidia driver/middleware seems to palm off additional work to the CPU.