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BF3 immediately stutters when my total CPU usage goes above 80%. Help please.

post #1 of 55
Thread Starter 
Hello,
First of all, I am sorry if I am asking this in the wrong forum. Anyway, as the title says I start getting stuttering as soon as the total CPU usage goes above 80%, the framerate drops but there is still something that is stuttering the motion (even if it only drops down from 60 to 55, it feels like it is a stuttering mess). It usually happens on 64 player matches.
Is this a case of CPU bottlenecking?

Some of my friends play at BF3 with 85-90% CPU usage without this problem. How come?

My CPU is a i5 2500 (non 'k' version) and my graphics card is a AMD 7970Ghz. I'm running on Ultra on a 1920x1080 monitor. It makes no difference between Ultra or Low, as soon as CPU usage goes above 80% it starts stuttering.

Is there anything I can do other than getting a new CPU?

Please help,
thanks.
post #2 of 55
list your specs.

and how much ram do you have? mine does that when ram gets full when I had 4gig installed and cpu gets in high usage
post #3 of 55
Quote:
Originally Posted by d1nky View Post

list your specs.

and how much ram do you have? mine does that when ram gets full when I had 4gig installed and cpu gets in high usage

Good point regards ram. What are the temps on your cpu/gpu whilst this happens, could be the card throttling back. I have a stutter issue but not cpu related and only after few hours which is one of my cards throttling. I have to system reset
post #4 of 55
Your CPU shoudn't be a bottleneck,even in BF3.I have the 3570k and even at stock,it was plenty.
I think your stuterring problems come because you're probably getting too much frames .Let's say if you get 80fps,and your monitor refresh rate is 60hz,you'll feel like the game isn't smooth.The only thing you could do is to limit your frames with a program.Or even try Vsync.WIth vsync,everything is butter smooth all the time,no matter the CPU usage.It can be caused by your GPU too,AMD have frame latency issues.
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post #5 of 55
Thread Starter 
8GB RAM, though I've never seen the game ask for more than 4GB of RAM.

Graphics card: AMD 7970 GHz

CPU: i5 2500 (non 'k' version)

Generic hardrive, simple 620w PSU.
post #6 of 55
Quote:
Originally Posted by Scarfall View Post

8GB RAM, though I've never seen the game ask for more than 4GB of RAM.

Graphics card: AMD 7970 GHz

CPU: i5 2500 (non 'k' version)

Generic hardrive, simple 620w PSU.
A lot of people are going to argue against me when i say that but:
Slow and generic harddrives(atleast with me) cause stutterring in games because they read too slow for the game to be smooth enough!I really doubt it's your CPU
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post #7 of 55
Thread Starter 
Quote:
Originally Posted by hotwheels1997 View Post

Your CPU shoudn't be a bottleneck,even in BF3.I have the 3570k and even at stock,it was plenty.
I think your stuterring problems come because you're probably getting too much frames .Let's say if you get 80fps,and your monitor refresh rate is 60hz,you'll feel like the game isn't smooth.The only thing you could do is to limit your frames with a program.Or even try Vsync.WIth vsync,everything is butter smooth all the time,no matter the CPU usage.It can be caused by your GPU too,AMD have frame latency issues.
I'm using RadeonPro to limit the frames to 60fps, triple buffering is on too. I also have dynamic v-sync for when the framerate drops lower than that. I also queue 1 frame (with RadeonPro). The game runs really smooth at 60fps until 79% CPU usage, as soon as it hits 80% stuttering starts.
post #8 of 55
Quote:
Originally Posted by hotwheels1997 View Post

A lot of people are going to argue against me when i say that but:
Slow and generic harddrives(atleast with me) cause stutterring in games because they read too slow for the game to be smooth enough!I really doubt it's your CPU

That is a valid point. I don`t think bottleneck with single card anyway. Frame drops in mp are normal due to the nature of the game but stutter is not. Which gpu drivers?
post #9 of 55
Thread Starter 
Quote:
Originally Posted by Ghost12 View Post

Good point regards ram. What are the temps on your cpu/gpu whilst this happens, could be the card throttling back. I have a stutter issue but not cpu related and only after few hours which is one of my cards throttling. I have to system reset
On 64 players match, overlooking the map and the CPU usage hitting 80% (when the stuttering starts) the CPU of all 4 cores fluctuated between 60 to 67º. I live in a very hot island. I'm using a stock cooler.
post #10 of 55
Thread Starter 
Quote:
Originally Posted by Ghost12 View Post

That is a valid point. I don`t think bottleneck with single card anyway. Frame drops in mp are normal due to the nature of the game but stutter is not. Which gpu drivers?
13.3 Beta 3.
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