How do you know when a CPU is bottle necking a GPU?

[Im Weeb]

How do you know when a CPU is bottle necking a GPU?

 

Would like to know what are the signs of something like this happening.

[minibois]

you go into task manager and see if your CPU is at a very high percentage and your GPU is not.

or when people with a better CPU, get a lot better fps on the same GPU

[rares495]

Task manager only shows how many of the cores are used. There is also the matter of how fast those cores actually are. This is only perceivable in day to day usage and synthetic benchmarks.

[Im Weeb]

3 minutes ago, minibois said:

you into task manager and see if your CPU is at a very high percentage and your GPU is not.

or when people with a better CPU, get a lot better fps on the same GPU

So benchmarks for example?

[Im Weeb]

Just now, rares495 said:

Task manager only shows how many of the cores are used. There is also the matter of how fast those cores actually are. This is only perceivable in day to day usage and synthetic benchmarks.

Then what would be your way of knowing?(Besides horrible performance)

[minibois]

Just now, Im Weeb said:

So benchmarks for example?

A gaming benchmark for example should stress your GPU entirely, but if you see it's at 50%, while your CPU (or some of its cores) are at 100%: that's bottlenecking.

Or if you get a certain score in this benchmark, but others are getting double that with a better CPU and the same GPU, you sort of know what is holding you back.

 

[Im Weeb]

Just now, minibois said:

A gaming benchmark for example should stress your GPU entirely, but if you see it's at 50%, while your CPU (or some of its cores) are at 100%: that's bottlenecking.

Or if you get a certain score in this benchmark, but others are getting double that with a better CPU and the same GPU, you sort of know what is holding you back.

 

So a good way to know before buying the parts would be checking benchmarks with the same GPU but different CPU's to see if it bottlenecks?

[rares495]

3 minutes ago, Im Weeb said:

Then what would be your way of knowing?(Besides horrible performance)

Well, general poor performance in Windows and in games. Overall slowness if you will. Perceivable lag or stutters or freezes.

 

A good benchmark for this is Cinebench R20 Single core.

[Im Weeb]

2 minutes ago, rares495 said:

Well, general poor performance in Windows and in games. Overall slowness if you will. Perceivable lag or stutters or freezes.

 

A good benchmark for this is Cinebench R20 Single core.

Why single core?

[rares495]

Just now, Im Weeb said:

Why single core?

Because it highlights the performance of each core of your CPU a.k.a. how fast your individual cores are.

[The_russian]

2 minutes ago, rares495 said:

A good benchmark for this is Cinebench R20 Single core.

Cinebench doesn't stress the GPU, so you wouldn't use it to test whether or not a cpu is bottlenecking a gpu. You would need a load that stresses both cpu and gpu, like an in-game benchmark.

[rares495]

Just now, The_russian said:

Cinebench doesn't stress the GPU, so you wouldn't use it to test whether or not a cpu is bottlenecking a gpu. You would need a load that stresses both cpu and gpu, like an in-game benchmark.

We were discussing CPU core performance.

[SolarNova]

Assuming a specific game has no engine related performance issues ..which u really cant count on nowadays... u would see the GPU not maxing out in usage despite having uncapped frame rates.

 

However due to many games having their own engine and game related performance issues nowadays its usually a simple case of finding trusted benchmarks made using top fo the line hardware to indicate best case FPS figures . Better yet would be finding benchmarks that have been made using the same GPU you have but with a top of the line CPU so u can compare.