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FX 6300 Bottle Necking CF 7870?

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a b à CPUs
August 13, 2013 7:00:45 PM

Hey guys and testing crossfire with these two hot chicks i got here (XFX HD DD 7870's) In BF3 Multi-Player my FPS doesn't to increase at all in fact it think it might be a little bit lower, GPU's usage round 40-60%. Tested another game Tomb Raider and saw about an 70% increase with GPU's Usage 80-100%.

Went ahead and try BF3 single player with CF disable walking down the same path and get an average of 70 FPS with GPU at 99%. Enabled CF and walking the same Path i got 140 FPS on average with GPU's usage at 80-99%.

So its safe to say my CPU is holding me back in BF3 Multi-Player? Am considering on Getting the FX 8320 since its on amazon for $145 ($35 cheaper that the FX 8350)
a b à CPUs
August 13, 2013 7:17:26 PM

Well I can say the FX-8350 is a great gaming CPU. I have not used the FX-8320 but I would think it would be fairly close to the performance of the Fx-8350.
a b à CPUs
August 13, 2013 7:42:22 PM

bryonhowley said:
Well I can say the FX-8350 is a great gaming CPU. I have not used the FX-8320 but I would think it would be fairly close to the performance of the Fx-8350.


FX 8320 is basically an 8350 clock .5GHz slower
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a c 406 à CPUs
August 14, 2013 1:09:21 AM

Yes a 8320 is a better option
And there is a probability of a bttleneck with 6300

But i wud say o.c. 6300 to 4.0 ghz so no bttleneck
a b à CPUs
August 14, 2013 3:14:29 AM

you will see little to no dfference between an overclocked FX 6300 and an FX 8320/8350. Pretty much the same processor with one extra module (2 weak psuedo cores) based on the same architecture.

Instead of wasting money on a new processor why not just OC the heck out of the 6300? Bottleneck gone
a b à CPUs
August 14, 2013 3:31:56 AM

I have my FX 6300 OC to 4.3GHz and i doubt going to 4.5 will make much different. If i pick up the 8320 from amazon and it don't make much difference, i got a month to return it for a full refund so its no big deal. If its better, then i'll sell my FX 6300 to get some money back. My FX 6300 hits 100% on 2 cores with just one 7870, with two of them, all core are maxed out.
a c 406 à CPUs
August 14, 2013 5:08:37 AM

Ohkay there is possibly a bottleneck moreover there are problems with crossfire that could also cause this issue

I would say go in for 8320 and sure u ll get much difference
a c 79 à CPUs
August 14, 2013 5:13:14 AM

crossfire bottlenecks itself......because it causes stuttering amongst a range of other issues. but your complaining about frame rates over 70fps?.... unless you have an expensive monitor that can refresh more than 60 hz (60 fps) then your wasting your time chasing fps that is not able to be displayed by your monitor. you just end up with shit image quality with screen tearing due to more than one frame displayed per refresh cycle. I get about 70-80% useage of cpu in a 64 player multiplayer bf3 with my setup, which is similar to yours gpu performance-wise. people say it can use the 8 cores of the amd cpu's, maybe it can, maybe it cant. i have yet to see proof it runs any better on a 6 core amd to an 8 core, due to the fact an 8 core amd is actualy 4 module, 4 FPU. I have seen benches however, that an overclocked 6 core amd performs quite well, i would look into that if i were you.
a c 406 à CPUs
August 14, 2013 5:17:50 AM

I play bf3 with a phenom ll 965 with an o.c. Of 3.7 and it never uses more than 70% so not a problem there main reason for your problem is crossfire

My final advice would be wait for new drivers which amd claims will solve this issue

Dont waste ur money on a 8320 unless u need to
a b à CPUs
August 14, 2013 6:12:11 AM

iam2thecrowe said:
crossfire bottlenecks itself......because it causes stuttering amongst a range of other issues. but your complaining about frame rates over 70fps?.... unless you have an expensive monitor that can refresh more than 60 hz (60 fps) then your wasting your time chasing fps that is not able to be displayed by your monitor. you just end up with shit image quality with screen tearing due to more than one frame displayed per refresh cycle. I get about 70-80% useage of cpu in a 64 player multiplayer bf3 with my setup, which is similar to yours gpu performance-wise. people say it can use the 8 cores of the amd cpu's, maybe it can, maybe it cant. i have yet to see proof it runs any better on a 6 core amd to an 8 core, due to the fact an 8 core amd is actualy 4 module, 4 FPU. I have seen benches however, that an overclocked 6 core amd performs quite well, i would look into that if i were you.


My monitor refresh rate is 75, and the fact that one GPU actually performs better than both in CF I get it could possibly be an crossfire issue. The problem is it works great in single player but horrible in Multi-Player. With CF disable my CPU still hits 100% on the cores. As for Overclocking when I get home from work it OC it to 4.8GHz an see if it makes much difference.

a c 406 à CPUs
August 14, 2013 6:15:13 AM

Yeah thats the way to go

But i would say be patient soon there will be drivers solving CF issues
There is a beta version but its unstable
a b à CPUs
August 14, 2013 6:15:58 AM

Sn1992 said:
I play bf3 with a phenom ll 965 with an o.c. Of 3.7 and it never uses more than 70% so not a problem there main reason for your problem is crossfire

My final advice would be wait for new drivers which amd claims will solve this issue

Dont waste ur money on a 8320 unless u need to


My FX 6300 @ 4.3Ghz goes above 80% using only one GPU.
I can get an Phenom 11 x6 1045T from my cousin since he switched to intel and test it out also.

a c 406 à CPUs
August 14, 2013 6:18:32 AM

Yeah check it out
Mine is an old gpu not that good that may be the reason for me
Its an hd 5830

Imwould advice u waiting for drivers and not going too high on o.c.
a b à CPUs
August 14, 2013 6:24:13 AM

Sn1992 said:
Yeah check it out
Mine is an old gpu not that good that may be the reason for me
Its an hd 5830

Imwould advice u waiting for drivers and not going too high on o.c.


Alright I'll check out the phenom x6 amd hold off on a CPU upgrade and also wait for the driver update. I can't help but notice that games that are not CPU intensive performs up to 40% better with CF.
a c 406 à CPUs
August 14, 2013 6:28:34 AM

Yeah go ahead

Dont frget to pick a solution to ur thread
a b à CPUs
August 14, 2013 6:48:44 AM

You should be fine with a 6300 driving 2 7870s.

I have a Phenom II X6 1090t @ 4.0GHz with 2 HD 7950's in crossfire. It's on a 990FX board that can do 2 x16 PCIe @ x16. No CPU bottlenecking on mine and I get a pretty constant 50-60 FPS (Vsync) with Crysis 3 maxed w SMAA 2x @ 1080p. (* SMAA 2x recommended by Tom's as the best AA appearance/performance balance. See their Crysis 3 review for more info)

The FX 6300 has a slightly higher clock as well.

However, if you really WANT an 8350...go for it. No such thing as overkill. It's 'preparing for the next upgrade' in my book. ;) 
a b à CPUs
August 14, 2013 7:29:06 AM

maddogfargo said:
You should be fine with a 6300 driving 2 7870s.

I have a Phenom II X6 1090t @ 4.0GHz with 2 HD 7950's in crossfire. It's on a 990FX board that can do 2 x16 PCIe @ x16. No CPU bottlenecking on mine and I get a pretty constant 50-60 FPS (Vsync) with Crysis 3 maxed w SMAA 2x @ 1080p. (* SMAA 2x recommended by Tom's as the best AA appearance/performance balance. See their Crysis 3 review for more info)

The FX 6300 has a slightly higher clock as well.

However, if you really WANT an 8350...go for it. No such thing as overkill. It's 'preparing for the next upgrade' in my book. ;) 


My mobo only supports 2 pci e at x16 and another at x4. Your phenom x6 has 6 real cores as to my FX 6300 weak ones. I'll do some more test when I get home and and then decide what I should do.

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a c 79 à CPUs
August 30, 2013 3:13:17 PM
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ifreestylin said:
maddogfargo said:
You should be fine with a 6300 driving 2 7870s.

I have a Phenom II X6 1090t @ 4.0GHz with 2 HD 7950's in crossfire. It's on a 990FX board that can do 2 x16 PCIe @ x16. No CPU bottlenecking on mine and I get a pretty constant 50-60 FPS (Vsync) with Crysis 3 maxed w SMAA 2x @ 1080p. (* SMAA 2x recommended by Tom's as the best AA appearance/performance balance. See their Crysis 3 review for more info)

The FX 6300 has a slightly higher clock as well.

However, if you really WANT an 8350...go for it. No such thing as overkill. It's 'preparing for the next upgrade' in my book. ;) 


My mobo only supports 2 pci e at x16 and another at x4. Your phenom x6 has 6 real cores as to my FX 6300 weak ones. I'll do some more test when I get home and and then decide what I should do.



never run crossfire with a 4x slot. Anyone who has ever done so has regretted it. In some cases it causes worse performance than a single card, and more stuttering due to the slower rendering times of the card in the slower slot.
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