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CPU bottleneck here...right? - Page 3

post #21 of 61
Quote:
Originally Posted by digiadventures View Post


Warning: Spoiler! (Click to show)
No, cpu doesnt have to be pegged at 100% usage or even near, because game might not use all cores efficiently.
It doesn't mean game doesnt need more cpu power.
Gpu usage HAS to be 99%, otherwise SOMETHING is bottlenecking GPU CORE.
It can ve vram, or cpu.

I swear, some people just want to argue...
Can you provide proof of what you're saying, no.
Essentially you are telling us that unless your GPU is running at 100% load at all times, then something is holding it back, correct? sure, sometimes that's true, however cannot be used a blanket statement since there are instances where its not true at all.
Quote:
Originally Posted by digiadventures View Post



*snip*
Something will ALWAYS "bottleneck" even if your are getting hundreds of fps...

In this case, in a game that is known to utilize more than 2 cores:

*stolen from techspot.com*


if you have pretty much any modern CPU that has more than 2 cores/threads, the CPU simply is not bottlenecking...

Digiventures, yes there is a bottleneck.. in this case its the software itself.. the game he's playing and the GPU used to render it. its code doesn't need 100% load on his GPU since its a 7950, and its wonderful for 1080p

7950 performance in BF3
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post #22 of 61
Quote:
Originally Posted by digiadventures View Post

No, your were right.
Something is bottlenecking your gpu, most probably your cpu.
Try to overclock vram, and see if there is any difference.
If not, your are beeing bottlenecked by cpu. If you see major difference when overclocking vram, then your are beeing bottlenecked by vram

Yes I will concede that if he wants better performance then GPU overclocking is necessary here. but please realize that you contradicted yourself digiventures, because if he had a CPU bottleneck, then no amount of GPU overclocking would remedy that.. think about it man.
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post #23 of 61
Well in theory <99% GPU-usage=something is bottlenecking, however in practice it isnt really that simple. You have to take into an account such things as coding, drivers, screens refreshrate, framerate and so on, I remember when I had a single GTX560ti+2500k@4,5GHz and in BF3 my GPU sometimes went to 95-98% usage when my framerate was waaay above my monitors refreshrate, cpu-bottleneck? Nope.

Do you mean overclock Vram or Ram? Because it is very unlikely they are the issue here, overclocking CPU might help and also closing unnecessary programs (like steam) from the background. But if there is a bottleneck, it is barely noticeable...
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post #24 of 61
Quote:
Originally Posted by zer0entropy View Post

I swear, some people just want to argue...
Can you provide proof of what you're saying, no.
Essentially you are telling us that unless your GPU is running at 100% load at all times, then something is holding it back, correct? sure, sometimes that's true, however cannot be used a blanket statement since there are instances where its not true at all.
In this case, in a game that is known to utilize more than 2 cores:

*stolen from techspot.com*


if you have pretty much any modern CPU that has more than 2 cores/threads, the CPU simply is not bottlenecking...

Digiventures, yes there is a bottleneck.. in this case its the software itself.. the game he's playing and the GPU used to render it. its code doesn't need 100% load on his GPU since its a 7950, and its wonderful for 1080p

7950 performance in BF3

PLEASE, no more BF3 singleplayer graphs, you might confuse some ppl, we are talking about multiplayer here, its a different game when 64 players are trying to kill each other on large maps, it all of the sudden becomes one of the most CPU-demanding games out there.

http://www.sweclockers.com/artikel/14650-prestandaanalys-battlefield-3/5
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post #25 of 61
it seems to me something is frame limiting. or the GPU would be pegged at closer to 99 all the time. if not in game sync then maybe CCC forced sync or something else. what is the maximum fps you get? because it looks like the dips on the GPU load would be due to it not needing to work and that would never be the case if the frames weren't being limited by something. it would just draw more frames. and it is absolutely not a CPU bottleneck or at least one of the CPU cores would be maxed or close to it.
post #26 of 61
Quote:
Originally Posted by youpekkad View Post


Warning: Spoiler! (Click to show)
PLEASE, no more BF3 singleplayer graphs, you might confuse some ppl, we are talking about multiplayer here, its a different game when 64 players are trying to kill each other on large maps, it all of the sudden becomes one of the most CPU-demanding games out there.

http://www.sweclockers.com/artikel/14650-prestandaanalys-battlefield-3/5

Oops, sorry about that.

Still, the site you are referencing is still going with my point, and shows almost the exact same trend that the one I posted shows. Dual cores/threads really hinder performance badly, Quad cores are adequate, and 6 or 8 core/thread count is pretty damn even. perhaps within a few fps of each other.

Edit: fixed.
Edited by zer0entropy - 2/23/13 at 9:14am
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post #27 of 61
does it do the same thing with less players? or on a server with faster ping does it utilize the GPU more? just curious. connect to an atrociously slow ping server and see if your GPU utilization drops off even more.
post #28 of 61
I'm not a bf3 player so I'm just running through possibilities in my head sorry if I sound ignorant in respect to the game.
post #29 of 61
Quote:
Originally Posted by zer0entropy View Post

I swear, some people just want to argue...
Can you provide proof of what you're saying, no.

There is no need to provide proof for something that is common knowledge smile.gif
Everybody should know that games still dont utilize 8 cores cpus properly, lot of games dont even utilize 4 cores fully.
So, since OP provided a screenshoot where he clearly uses 8 core cpu, it means that of course not all cores will be under full load, even if game needs more cpu power.
He can test by overclocking his cpu ( or downclocking ) to see if fps in game will change.
Quote:
Originally Posted by zer0entropy View Post

Essentially you are telling us that unless your GPU is running at 100% load at all times, then something is holding it back, correct? sure, sometimes that's true, however cannot be used a blanket statement since there are instances where its not true at all.
Yes correct, thats always true, bottleneck can be a software option such as vsync or some kind of fps limiting software, it doesnt have to be a hardware thats holding the card back.
Quote:
Originally Posted by zer0entropy View Post

In this case, in a game that is known to utilize more than 2 cores:

*stolen from techspot.com*


if you have pretty much any modern CPU that has more than 2 cores/threads, the CPU simply is not bottlenecking...

This is completely unrelated to this disscussion, since you didnt provide a screenshoot which shows gpu not beeing used 100% in these tests.
Quote:
Originally Posted by zer0entropy View Post

its code doesn't need 100% load on his GPU

It doesn't work like that...
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post #30 of 61
Quote:
Originally Posted by zer0entropy View Post

Yes I will concede that if he wants better performance then GPU overclocking is necessary here. but please realize that you contradicted yourself digiventures, because if he had a CPU bottleneck, then no amount of GPU overclocking would remedy that.. think about it man.

I just said something is bottlenecking..it doesnt have to be CPU - second most common culprit is video ram, so in that case, yes you can say gpu is bottlenecking itself.
You see, whats shown under gpu usage is gpu core usage, so if vram is not providing data fast enough to gpu core, it will show less then 100% usage
This also can easily be tested by overcloking vram...
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