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21:9 increase CPU Limited ? - Page 2

post #11 of 49
Which cpu,which resolution?which games?which gpu?
post #12 of 49
Thread Starter 
i have i5 4670k @default
GPU now i have GTX770 but i'll replace it with GTX780 Ghz Edition.
post #13 of 49
Quote:
Originally Posted by senna89 View Post

i have i5 4670k @default
GPU now i have GTX770 but i'll replace it with GTX780 Ghz Edition.

Like I said, the GPU usage will increase. The CPU usage will more or less stay the same.
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post #14 of 49
Lets say you play Battlefield 4 with your 4670K and the GTX770,
To run @ 100% GPU Usage and max FPS the CPU usage could be 60%.

The 780TI has allot more potential for higher ingame FPS, leading to a higher CPU usage to keep up.
Since all the CPU related effects also need to ''run at a higher fps''
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post #15 of 49
Moving from a 770 to a 780 will increase CPU usage slightly. But moving to a different aspect ratio will only affect the GPU usage generally.
Quote:
Originally Posted by prescotter View Post

Lets say you play Battlefield 4 with your 4670K and the GTX770,
To run @ 100% GPU Usage and max FPS the CPU usage could be 60%.

The 780TI has allot more potential for higher ingame FPS, leading to a higher CPU usage to keep up.
Since all the CPU related effects also need to ''run at a higher fps''

Can you explain this further?
Edited by BradleyW - 4/24/14 at 5:06am
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post #16 of 49
I made a example here:"

I5 2500k 5.0Ghz, HD7970 1075Mhz Core / 1750Mhz Memory -> -50% Powerlimit (Resulting in a heavily throttling HD7970, lets say performance of a hd6850)

Avarage CPU Usage while playing Red Orchestra 2 = 50%-60% CPU Usage ingame

I5 2500k 5.0Ghz, HD7970 1075Mhz Core / 1750Mhz Memory -> +50% Powerlimit (Performing like a HD7970 Ghz edition)


Avarage CPU Usage while playing Red Orchestra 2 = 100%

Both tests are done in the First Training level of the game, just viewing around for 30secs.
You can clearly see that the CPU only works as fast, as the GPU "needs".

With a faster video card giving more potential performance, the CPU has to work harder to ''feed'' the gpu.

So with my tests a Slow Performing GPU results in way less CPU usage then a Faster performing GPU.



If you think about it like this:
If you have a GTX680 or a GTX Titan, on which PC does the CPU has to "work harder, to feed and keep up" with the gpu?
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post #17 of 49
There is one extra process in the 2nd chart...so that`s not accurate at all
post #18 of 49
That extra process is just Paint that stands open, if you desire i could show this with more games.

But its just the opposite of a CPU bottleneck works, If you have a Fast GPU, you need a FAST CPU to feed it.
Or the a CPU Bottleneck appears.

I showed it in the opposite way, that with a Slower GPU, the CPU usage lowers.
Edited by prescotter - 4/24/14 at 6:15am
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post #19 of 49
Quote:
Originally Posted by prescotter View Post

That extra process is just Paint that stands open, if you desire i could show this with more games.

But its just the opposite of a CPU bottleneck works, If you have a Fast GPU, you need a FAST CPU to feed it.
Or the a CPU Bottleneck appears.

I showed it in the opposite way, that with a Slower GPU, the CPU usage lowers.
mayne if you have anno 2070,civ v,total war would be great
post #20 of 49
Im sorry i do not have those games, but i did a quick test with BF4.

I5 2500k 5.0Ghz, HD7970 1075Mhz Core / 1750Mhz Memory -50% power limit = Slower GPU

CPU Usage 90%

I5 2500k 5.0Ghz, HD7970 1075Mhz Core / 1750Mhz Memory +50% power limit = Faster GPU

CPU Usage pegged to 100% during gameplay.

The effect is smaller, but the faster the videocard, the faster your CPU needs to be for it not to bottleneck it.
Resulting in a higher CPU usage on the same CPU, if a faster gpu is used.
CPU also renders stuff in videogames, its not that the GPU does 100% of all the rendering stuff

Edit; Test is done in the Test Range of BF4, standing Stationary in one spot, Alt-Tabbing back to game after editing settings in MSI Afterburner.

To make things even worse, if i run Battlefield 4 without MSAA, and 100% Screen resolution, my 2500K 5.0ghz technicly Bottlenecks my HD7970 on 1080p cheers.gif
(Not 100% GPU Usage Constantly )

edit 2: plz not pay attention to the CPU speed, i think it shows a different speeds since i took the screenshot in windows, even though the game was running in the background my CPU went into Power Saving mode i geuss. (Have speedstep + all c states enabled with offset OC)
Edited by prescotter - 4/24/14 at 6:32am
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Blazer
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