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Bf3 cpu(?) problems

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August 11, 2012 2:39:02 AM

I have two 7970s in crossfire and an Intel i7 3770 3.4GHz. I had some problems a little while ago with fps dips into forties so I tried many different things including completely reistalling windows but I ended up overclocking it to 3.5GHz the same speed as a 3770K. (at turbo it gets 4.3GHz instead of stock 3.9).

Now in bf3 I still am getting dips into fifties when the whole map is in view. I am finding it very hard to believe that this would be a graphics problem unless indeed two 7970s cannot even provide constant 60 fps on ultra (which would be ridiculous). for example i play tdm on noshahr canals and it runs about 100-140 fps unless i am on the side dock area then its 80-95 and when i die and it goes to the loadout menu overlooking the whole map, the fps drops into 50s.

-If i play on an empty server, no dips. Another reason I am thinking it is not a problem with the GPUs.
-At these different points overlooking maps the fps does not change at all if both gpus are oc it stays the same fps as it does on stock clocks.
-While I sit at the top of the tower on Gulf of Oman looking down with fps reading 55, both GPU usage are at 69%.... so if shouldnt they be pumping out more power to get it to 60...
Thankyou for any help

More about : bf3 cpu problems

a c 283 à CPUs
August 11, 2012 2:47:33 AM

Well, first of all, the max Turbo you set is only possible when one core is in use anyway.

For a max 4 core OC on that CPU, you can go all the way to 3.9 on all 4 cores (I think), so try that.
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August 11, 2012 2:50:55 AM

DJDeCiBeL said:
Well, first of all, the max Turbo you set is only possible when one core is in use anyway.

For a max 4 core OC on that CPU, you can go all the way to 3.9 (I think), so try that.


Well I have an ASUS MoBo and it has a utility to auto OC the CPU in BIOS so I used that and it bumped up 3.4 to 3.5 and turbo from 3.9 to 4.3. When I look at it in windows in task manager or CPU-Z or wtvr program it says all 8 threads being used and it's running at 4.3GHz (with bf3 running)

Should I try take off the CPU OC altogether nonetheless?
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a c 283 à CPUs
August 11, 2012 2:52:54 AM

iyzik said:
Well I have an ASUS MoBo and it has a utility to auto OC the CPU in BIOS so I used that and it bumped up 3.4 to 3.5 and turbo from 3.9 to 4.3. When I look at it in windows in task manager or CPU-Z or wtvr program it says all 8 threads being used and it's running at 4.3GHz (with bf3 running)

Should I try take off the CPU OC altogether nonetheless?


Ah, I'm guessing that it's OC'ing the BCLK too, then. It really does surprise me that it's able to OC it ALL the way to 4.3 on ALL 4 cores though. I didn't even know that was possible.
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a c 283 à CPUs
August 11, 2012 2:58:04 AM

You can leave it though, since you won't be able to do any better than 4.3 on your own.

One thing though. Try running Prime 95 and see what CPU-Z says then. This is just for my own curiosity more than anything else.
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a c 283 à CPUs
August 11, 2012 3:07:25 AM

I just did the math, and even at a 40x multi, it would have had to OC the BCLK to 107Mhz to even get to 4280Mhz. I'm REALLY curious as to how it gets to 4.3 on ALL 4 cores because 107Mhz on the BCLK is pushing past the "safe" limits for BCLK OC'ing.
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August 11, 2012 3:38:27 AM

DJDeCiBeL said:
I just did the math, and even at a 40x multi, it would have had to OC the BCLK to 107Mhz to even get to 4280Mhz. I'm REALLY curious as to how it gets to 4.3 on ALL 4 cores because 107Mhz on the BCLK is pushing past the "safe" limits for BCLK OC'ing.


Ah my mistake it was 4223MHz. But anyway I am resetting BIOS completely and try bf3 again. Any suggestions for CPU settings I should set in BIOS?
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a c 283 à CPUs
August 11, 2012 3:59:44 AM

iyzik said:
Ah my mistake it was 4223MHz. But anyway I am resetting BIOS completely and try bf3 again. Any suggestions for CPU settings I should set in BIOS?


Sorry, a storm knocked out the power for a few minutes here, but basically, it's doing better than you could on your own, really, especially with a locked CPU.

You can do what I said originally (set the Turbo multi's for all 4 cores to 3.9), but that just puts all 4 cores at 3.9, instead of 4233Mhz, so it would actually be slower (assuming that all 4 really ARE at 4233Mhz @ 100% load).

Also, try using the High Performance power profile in Windows to keep it at max speed when you're playing. That should help at least a bit.

I still have my doubts that it REALLY was at 4233Mhz with all 4 cores under load, but if it WAS, that's VERY surprising to me.
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August 11, 2012 4:09:22 AM

DJDeCiBeL said:
Sorry, a storm knocked out the power for a few minutes here, but basically, it's doing better than you could on your own, really, especially with a locked CPU.

You can do what I said originally (set the Turbo multi's for all 4 cores to 3.9), but that just puts all 4 cores at 3.9, instead of 4233Mhz, so it would actually be slower (assuming that all 4 really ARE at 4233Mhz @ 100% load).


Well I'm not really thinking its the power of the cpu thats a problem i think i may have some weird setting somewhere or something like that. I just reset all BIOS settings CPU back to stock clocks and played another match on noshahr. when im running around the map with vsync disabled gpu usage ranges from 93-98% and fps from 100-150. Then when i get to loadout menu fps drops to 50s immediately and gpu load drops to 75%..

Hmm just played a second game and only dropped to 66 fps on loadout with gpu load 88%. I will try gulf of oman that seems to be the worst
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a c 283 à CPUs
August 11, 2012 4:15:05 AM

iyzik said:
Well I'm not really thinking its the power of the cpu thats a problem i think i may have some weird setting somewhere or something like that. I just reset all BIOS settings CPU back to stock clocks and played another match on noshahr. when im running around the map with vsync disabled gpu usage ranges from 93-98% and fps from 100-150. Then when i get to loadout menu fps drops to 50s immediately and gpu load drops to 75%..

Hmm just played a second game and only dropped to 66 fps on loadout with gpu load 88%. I will try gulf of oman that seems to be the worst


Just try doing what I said and set all 4 Turbo multi's to 39x and enable the High Performance power profile (Control Panel -> Power Options -> High Performance). Just trust me there. That keeps it from EVER clocking down (basically disables Turbo and SpeedStep completely), and forces it to run at max speed (3.9 in this case) constantly.

You don't want it to run that way ALL of the time, so you can set it back to Balanced when you're done gaming.
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August 11, 2012 4:15:41 AM

DJDeCiBeL said:
Just try doing what I said and set all 4 Turbo multi's to 39x and enable the High Performance power profile (Control Panel -> Power Settings -> High Performance). Just trust me there. That keeps it from EVER clocking down (basically disables Turbo and SpeedStep completely), and forces it to run at max speed (3.9 in this case) constantly.


Ok, am trying that now.
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a c 283 à CPUs
August 11, 2012 4:17:41 AM

I should have said "Power Options", but you'll find it.

And read the edit to that reply too.
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a b à CPUs
August 11, 2012 4:20:25 AM

iyzik said:
Well I'm not really thinking its the power of the cpu thats a problem i think i may have some weird setting somewhere or something like that. I just reset all BIOS settings CPU back to stock clocks and played another match on noshahr. when im running around the map with vsync disabled gpu usage ranges from 93-98% and fps from 100-150. Then when i get to loadout menu fps drops to 50s immediately and gpu load drops to 75%..

Hmm just played a second game and only dropped to 66 fps on loadout with gpu load 88%. I will try gulf of oman that seems to be the worst


you never said your resolution but i dont see a problem with your frames per second assuming youre at at least 1080p and fully maxed graphics settings.
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a c 283 à CPUs
August 11, 2012 4:23:07 AM

cbrunnem said:
you never said your resolution but i dont see a problem with your frames per second assuming youre at at least 1080p and fully maxed graphics settings.


I kind of agree with that, but I actually DO think the 3770 is bottle necking the two CF 7970's here. The GPU usage goes WAY down at times, and that's usually an obvious sign of a CPU bottle neck.

That and two 7970's should be able to keep a constant 60 FPS no matter the situation @1080p.
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a b à CPUs
August 11, 2012 4:31:54 AM

DJDeCiBeL said:
I kind of agree with that, but I actually DO think the 3770 is bottle necking the two CF 7970's here. The GPU usage goes WAY down at times, and that's usually an obvious sign of a CPU bottle neck.

That and two 7970's should be able to keep a constant 60 FPS no matter the situation @1080p.


you are asking a lot out of a cpu to keep up with TWO 7970s though.

Im interested for the OP to try just ONE 7970 and see how that goes.
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August 11, 2012 4:33:16 AM

DJDeCiBeL said:
I kind of agree with that, but I actually DO think the 3770 is bottle necking the two CF 7970's here. The GPU usage goes WAY down at times, and that's usually an obvious sign of a CPU bottle neck.

That and two 7970's should be able to keep a constant 60 FPS no matter the situation @1080p.


Strange that an i7 Ivy would bottleneck though...

Just did what you said and tried gulf of oman. (yes i am on ultra 1080p) fps dropped into 40s on this map. strange thing is at that same point where the low frames are overlooking the map gpu load on both 7970s is at 87% and cpu load 65%. throughout the game gpu load ranges from 70-98% and cpu ranges from 50-70%
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a c 283 à CPUs
August 11, 2012 4:33:53 AM

cbrunnem said:
you are asking a lot out of a cpu to keep up with TWO 7970s though.

Im interested for the OP to try just ONE 7970 and see how that goes.


Yeah, that's what I mean, and why I'm asking him to try the 3.9 on all 4 cores with High Performance enabled.

If that doesn't do it, it won't be done on THAT CPU anyway.
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a c 283 à CPUs
August 11, 2012 4:35:41 AM

iyzik said:
Strange that an i7 Ivy would bottleneck though...

Just did what you said and tried gulf of oman. (yes i am on ultra 1080p) fps dropped into 40s on this map. strange thing is at that same point where the low frames are overlooking the map gpu load on both 7970s is at 87% and cpu load 65%. throughout the game gpu load ranges from 70-98% and cpu ranges from 50-70%


Hmm. Now THAT would make it seem like it's not a CPU bottle neck at all. If it was, the CPU usage should be spiked at 100% when the FPS drops.

Some strangeness going on here.
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August 11, 2012 4:37:01 AM

DJDeCiBeL said:
Hmm. Now THAT would make it seem like it's not a CPU bottle neck at all. If it was, the CPU usage should be spiked at 100% when the FPS drops.

Some strangeness going on here.


I know right? This problems been going on for a while and for all the time I've owned bf3 on this pc I have never seen the cpu usage pass 75% on that game
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a b à CPUs
August 11, 2012 4:38:02 AM

iyzik said:
Strange that an i7 Ivy would bottleneck though...

Just did what you said and tried gulf of oman. (yes i am on ultra 1080p) fps dropped into 40s on this map. strange thing is at that same point where the low frames are overlooking the map gpu load on both 7970s is at 87% and cpu load 65%. throughout the game gpu load ranges from 70-98% and cpu ranges from 50-70%


yeah it really sounds like you have a cpu bottleneck or maybe an EXTREMELY slow hard drive which i dont even think is possible. also make sure in CCC you have set you graphics options to use application settings so your not forcing some crazy graphics settings through CCC.

You are maxing at least 4 cores it seems.
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a c 283 à CPUs
August 11, 2012 4:40:33 AM

I don't really know what else to say at this point, but I agree with cbrunnem that you should just check that there isn't some strange settings situation going on.

It may STILL be a CPU bottle neck, but that CPU usage makes it seem like it's not.
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August 11, 2012 4:48:05 AM

DJDeCiBeL said:
I don't really know what else to say at this point, but I agree with cbrunnem that you should just check that there isn't some strange settings situation going on.

It may STILL be a CPU bottle neck, but that CPU usage makes it seem like it's not.


Yeah I really feel like it is just a strange setting somewhere but I'm not really sure where else to check for something like that.
BTW I just played one more game on gulf and monitored the game. at the lowest fps point gpu load was actually at 75% not 87 and cpu load around 55%. average cpu load for the entire runtime was 49.97% :/ 

one last thing was that i dont feel like i started having this issue immediately after i updated BIOS from 0904 to 1406, but I also dont feel like i had this problem on the earlier BIOS version. only problem is i dont know how to downgrade
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a c 283 à CPUs
August 11, 2012 4:52:32 AM

iyzik said:
only problem is i dont know how to downgrade


I'm not sure you can, safely. It may just be as simple as getting an older BIOS and downgrading, but I'm honestly not sure on that one, myself.
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a b à CPUs
August 11, 2012 4:56:11 AM

DJDeCiBeL said:
I don't really know what else to say at this point, but I agree with cbrunnem that you should just check that there isn't some strange settings situation going on.

It may STILL be a CPU bottle neck, but that CPU usage makes it seem like it's not.


it is probably a cpu bottleneck since hes maxing at least 4 cores more then likely. remember it has 8 threads so 50% is four cores maxed since after four cores BF3 probably doesnt use the remaining threads very well.

iyzik said:
Yeah I really feel like it is just a strange setting somewhere but I'm not really sure where else to check for something like that.
BTW I just played one more game on gulf and monitored the game. at the lowest fps point gpu load was actually at 75% not 87 and cpu load around 55%. average cpu load for the entire runtime was 49.97% :/ 

one last thing was that i dont feel like i started having this issue immediately after i updated BIOS from 0904 to 1406, but I also dont feel like i had this problem on the earlier BIOS version. only problem is i dont know how to downgrade


CPU bottleneck for sure.
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a c 283 à CPUs
August 11, 2012 4:56:38 AM

cbrunnem said:
it is probably a cpu bottleneck since hes maxing at least 4 cores more then likely. remember it has 8 threads so 50% is four cores maxed since after four cores BF3 probably doesnt use the remaining threads very well.


Yeah, I forgot about the HT part of the equation.
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August 11, 2012 5:04:36 AM

DJDeCiBeL said:
Yeah, I forgot about the HT part of the equation.


Just tried disabling crossfire and ran it ultra with one card. fps in 40s and 50s the whole time gpu usage maxed out 100% of the time and cpu usage around 35%
dont know if that helps but thought id test it..

Soo im bottlenecked with a 350$ brand new i7 Ivy..... LOL wow that is ridiculous and theres just nothing i can do about it? how come nobody else is having this problem?
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a c 283 à CPUs
August 11, 2012 5:06:30 AM

iyzik said:
how come nobody else is having this problem?


I'm not sure that there's not. I've seen some people need to OC to 4.5+ to overcome a high end multi GPU bottle neck.
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August 11, 2012 5:07:47 AM

DJDeCiBeL said:
I'm not sure that there's not. I've seen some people need to OC to 4.5+ to overcome a high end multi GPU bottle neck.


Then what CPU would not bottleneck this game on LGA 1155 socket?
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a c 283 à CPUs
August 11, 2012 5:09:40 AM

iyzik said:
Then what CPU would not bottleneck this game on LGA 1155 socket?


I suppose an fairly highly OC'd 3770K would be it (or a fairly highly OC'd 3570K or 2500K).

Really, i5's are just as good for gaming as i7's (and sometimes a bit better because of HT causing issues, which MAY be what this ultimately IS).
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August 11, 2012 5:14:33 AM

DJDeCiBeL said:
I suppose an fairly highly OC'd 3770K would be it (or a fairly highly OC'd 3570K or 2500K).

Really, i5's are just as good for gaming as i7's (and sometimes a bit better because of HT causing issues, which MAY be what this ultimately IS).


so the big difference between the 3770 and 3770K is the K can be OC alot higher?
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a c 283 à CPUs
August 11, 2012 5:15:41 AM

iyzik said:
so the big difference between the 3770 and 3770K is the K can be OC alot higher?


Yeah, since it doesn't have a locked multiplier.
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August 11, 2012 5:17:09 AM

DJDeCiBeL said:
Yeah, since it doesn't have a locked multiplier.


Ahhhh. Damn I wish I'd have known that when I built this rig. So it'd be worthwhile looking into buying one of them eh?
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a c 283 à CPUs
August 11, 2012 5:24:01 AM

iyzik said:
Ahhhh. Damn I wish I'd have known that when I built this rig. So it'd be worthwhile looking into buying one of them eh?


If it matters enough to you, I suppose.
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August 11, 2012 5:28:00 AM

DJDeCiBeL said:
If it matters enough to you, I suppose.


Well, I'd like to have a CPU that doesnt bottleneck two 7970s for bf3 and if that is indeed possible with a 3770K then I'll go for it and sell some old stuff. You think it will eliminate the low gpu usage and low fps dips altogether?
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a c 283 à CPUs
August 11, 2012 5:30:33 AM

iyzik said:
Well, I'd like to have a CPU that doesnt bottleneck two 7970s for bf3 and if that is indeed possible with a 3770K then I'll go for it and sell some old stuff. You think it will eliminate the low gpu usage and low fps dips altogether?


OC'd high enough, yeah, probably, but you have to factor in the cost of a GREAT cooler to go with it. Something along the lines of a Noctua NH-D14 or a Phanteks PH-TC14PE.
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August 11, 2012 5:37:35 AM

DJDeCiBeL said:
OC'd high enough, yeah, probably, but you have to factor in the cost of a GREAT cooler to go with it. Something along the lines of a Noctua NH-D14 or a Phanteks PH-TC14PE.


Ok I think I'll get the first cooler just based on ratings vs the other with some thermal paste. How high of an OC do you mean exactly here?

Btw thank you so much for your help I really appreciate it I've been working on this problem for weeks.
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a c 283 à CPUs
August 11, 2012 5:38:46 AM

iyzik said:
How high of an OC do you mean exactly here?


I'm hoping 4.5 will do it. That would be right in the best zone for the NH-D14. It can get you higher, but temps WILL eventually become a problem. Ivy is just a hot running beast.
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August 11, 2012 5:42:44 AM

DJDeCiBeL said:
I'm hoping 4.5 will do it. That would be right in the best zone for the NH-D14. It can get you higher, but temps WILL eventually become a problem. Ivy is just a hot running beast.


Ok. Cool, thanks again.
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a c 283 à CPUs
August 11, 2012 5:43:20 AM

You're welcome. :) 
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August 11, 2012 5:43:39 AM

Best answer selected by iyzik.
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a b à CPUs
August 11, 2012 1:37:38 PM

yeah you are definitely bottlenecking but not by much so a decent overclock should fix the problem. the problem is you have 2 of the fastest graphics cards available today and the cpu just cant keep up.
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August 11, 2012 10:15:59 PM

cbrunnem said:
yeah you are definitely bottlenecking but not by much so a decent overclock should fix the problem. the problem is you have 2 of the fastest graphics cards available today and the cpu just cant keep up.


Yeah, didn't ever imagine I'd have bottleneck issues with an i7 but I guess I was wrong.
But I did have one last question I forgot to ask maybe you know the answer too. Since I currently have the i7 3770 and just ordered the 3770K, I am still skeptical about wether it will fix the problem because on the 3770 I can get an OC to 4.223GHz and it sounds like the 3770K gets 4.5 or 4.6. And considering the very small fps increase from 3.9 to 4.2 I am wondering if the difference between 4.2 on a 3770 and 4.5 on a 3770K will even make a difference?

Or do I have something wrong there? I know now that the 3770 has locked multipliers so even in the first place I am a bit confused how I got it to 4.2

Thanks
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