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I am so unhappy with crossfire hd6950

Last response: in Graphics & Displays
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January 31, 2011 11:09:48 AM

I purchased 2 xfx 6950 cards and did crossfire but performance is really poor.I installed a fresh win7 64bit..installed drivers 11.1 though i earlier i tried on 10.12 catalyst too and in CCC it shows crossfire is enabled but when i play Bad Company 2 my fps around 30-40.I am playing on low settings still no increase in fps.earlier i had xfx5870 and with high settings i use to have above 80 fps.in both the cards screen resolution is 1900x1080.I tried with 1bridge and 2 bridge too but there is not much improvement.And to my surprise with single card in Team Fortress 2 with highsettings i have above 80Fps in hd6950 but with crossfire performance decreases and fps is around 40-60.I did surfed many other forums but haven't find any help.I hope somone with right answer there to help me.:\

Asus P5Q-PRO Q8200 2.33GHz ,4gb Gskill Pi Black,Coolermaster 1000w silent pro ,HX CoolerMaster HAF 922
Seagate HDD-500+250 +1Tb
XFX RADEON 6950x2 Crossfire,Asus XOnar d2x, Logitech G500,Razer Destructer
Dell- ST2410 ,Roccat Valo ,Belkin-n52te, Logitech Z5500D, SennHeiser-595
January 31, 2011 11:12:25 AM

What are your system spec's? (make sure you include PSU make and model).
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January 31, 2011 3:12:09 PM

Well that is cpu is good but at that speed it is bottlenecking your cards.Its about time you overclock your cpu to at least 3 ghz.And at try test one card at a time.
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January 31, 2011 3:27:07 PM

i tried with one card too....as i mentioned with one card fps above 80 with high settings
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January 31, 2011 3:54:04 PM

You have a CPU bottleneck, and a possible reason for lower frame rates with CF enabled may be that CF adds more stress on the CPU, causing it to bottleneck even further.

Your situation isn't helped by the fact your playing BFBC2 which is very demanding on the CPU. Try overclocking your CPU, I'm 99% sure you'll see a substantial performance gain from doing so.
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January 31, 2011 6:06:29 PM

If u say so ...i try to overclock cpu too and update here again. but i must add while playing bc2 i did check on my g15keyboard cpu and ram usage is not more then 50%.Do u still thinkg its bottleneck
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January 31, 2011 6:17:41 PM

Sounds like a possible CPU bottleneck, but that doesn't really explain why a single card is faster than two. To me that points to a bandwidth issue.

Open GPUZ and see what it says for PCIe lanes. If they're both at 8x you should be ok but if the 2nd card is at 4x, that would be the problem.

Also just run a single crossfire bridge.

And also run some benchmarks like 3D mark 11, 3D Mark Vantage, Unigene Heaven etc.

And make sure your CCC settings are all at "use application settings", except for Catalyst AI you should try either Standard or Advanced - I leave mine on Advanced.

Oh and finally make sure you don't have vsync on, and also that your monitor drivers are installed properly
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January 31, 2011 6:54:09 PM

It is your cpu, just the clocks alone are to weak for the demands of going crossfire. You have no choice but to overclock but the gains are not going to be a sure thing. 3ghz for a 775/am2 system is really a requirement if you want to get the most out of your system.
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January 31, 2011 8:33:46 PM

well u all seem to saying right things i guess...as today i checked on asus aisuite and while playing bc2 cpu usage is above 80% 96% 76% 88% of four cpus and it clearly shows cpu bottleneck.I try to CF on my friends i7 and update soon
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January 31, 2011 9:36:23 PM

mrfrantik said:
well u all seem to saying right things i guess...as today i checked on asus aisuite and while playing bc2 cpu usage is above 80% 96% 76% 88% of four cpus and it clearly shows cpu bottleneck.I try to CF on my friends i7 and update soon


It doesn't matter who much are the usage levels but also system I/O has a Major factor in over all system performance of a multi gpu system. Your cpu doesn't cut ir period, it doesn't matter if is has 4 cores or 16 or any other number but if performance per clock per core is low in current applications it isn't going to perform very well nor is it when the system i/o isn't good enough to meet the needs of the cards when moving data between the cards and the rest of the system. Using these two cards on your friends system will perform very differently than on yours.
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February 1, 2011 12:46:42 AM

all you guys, yes he has a cpu bottleneck. I agree that even a single 6950 is being bottlenecked by his cpu and he should return one of the cards and buy a new cpu. even if crossfire was working properly, he would see littel if any performance increase with that cpu. but that would NOT cause performance to drop to 1/2 with a second card in xfire. Also, when in xfire mode your pci-e slots only run at 8x on that board ( http://www.overclockersclub.com/reviews/asus_p5q_pro/5.... ), which will limit performance, but only by 5-10% or so. This problem has come up before enven on higher end systems, its a crossfire problem, maybe video, motherboard driver related, bios related there are a whole lot of things to try.
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February 1, 2011 5:41:54 AM

today i am goin to see on my friends i7 how things work but i want u guys to suggest me cpu and mobo for what i want.I am goin for eyefinity ...already have 3 monitors ..2x22inch and 1x24inch.Reason for goin to crossfire 6950 is to have good fps in eyefinity.My major concern in mobo is that i want PCI Express x1 interface for asus xonar d2x hand it should not be between crossfire.Rest i am very thankfull to all guys for helping me it ...and i will update how it worked on i7 too...one more thing i like to ask is that6950 supports pci express 2.1...though i also be looking at them but i just couldn't find such mobos.And should i be looking for intel or amd?though i prefer intel but its nice to ask for advice from u guys
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February 1, 2011 5:53:43 AM

Im using a i7 920 OC to 3.6ghz and my 2 x xfx 6950's are performing awesome. You should see a vast improvement with your friends i7.
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February 1, 2011 6:21:06 AM

thx marney thats comforting :) 
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February 1, 2011 6:25:57 AM

Quote:
Processor Bottleneck with 2.33ghz. You need atleast 4GHz with those cards



Well, its been proven quite a few times that even two GTX 480s in SLI only require 3.2 GHz (on all cores) from an i5 750. With his current CPU, you might be right, however.
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February 1, 2011 7:04:11 AM

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C2Q's on average perform as well as X4's so the more clock speed the better


Right, but the Q8xxx series even had less cache and less clock for clock performance, so I would imagine that its even worse.
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February 1, 2011 8:07:02 AM

Quote:
I'm not sure why people would even attempt Xfire with a processor that slow.


I'm not sure why you need the second 6950 to begin with.
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February 1, 2011 8:18:46 AM

AMW1011 said:
I'm not sure why you need the second 6950 to begin with.

he did mention he wants to run eyefinity..........which makes the second card necessary.
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February 1, 2011 9:32:08 AM

AMW1011 said:
I'm not sure why you need the second 6950 to begin with.


Because getting 70 fps in Metro 2033 is awesome.
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February 1, 2011 12:31:50 PM

Quote:
I'm not sure why people would even attempt Xfire with a processor that slow.


That is why most avoided that series or stuck with decent dual cores that could easily reach 3.4ghz+ on the fly. The multiplier is far to low to make the 8xxx series quads worth much of any thing. It was usually either a q6600 or nothing as far as quads were concerned except for those who had deep enough pockets for the 9xxx series.
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February 1, 2011 12:33:43 PM

Quote:
I'm not sure why people would even attempt Xfire with a processor that slow.


people attempt xfire with slow processor cuz they thought there cpu is good enough and now aware that xfire need more power...


and yes eyefinity is my major concern and only reason for crossfire.
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February 1, 2011 2:21:35 PM

OP: If you need to do an overhaul might as well check out i5 2500k or i7 2600k. It'll be a retardedly huge difference compared to your current CPU. Of course you can save a bit without the K series... but why? 4.8ghz on air, with turbo... awesome.
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February 1, 2011 2:27:29 PM

if you gonna buy new cpu definitely get a K series, the premium isn't huge but the gains are. (you can't OC the basic version, only the K)

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February 1, 2011 2:34:01 PM

yeah id go for a 2500k, new motherboard, etc if your going to spend 600 in gpus...
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February 1, 2011 2:34:51 PM

whats going on with that intel math error stuff with the new SB chips btw?
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February 1, 2011 2:38:51 PM

jjb8675309 said:
whats going on with that intel math error stuff with the new SB chips btw?


No idea. I only know of the SATA controller issue on motherboards, which they're recalling.
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February 1, 2011 2:44:14 PM

wolfram23 said:
No idea. I only know of the SATA controller issue on motherboards, which they're recalling.

and if you get a mobo that has 4 sataIII ports then you should be fine for a while (2 from the chipset and 2 from some marvell controller). Don't need to use the defective sataII ports at all. :p P
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February 1, 2011 4:33:17 PM

why dont u guys suggest me since u all what i need...i can spend around 700$-750$ on both cpu and mobo...rest u guys tell me which one to buy...i am new to i7 so no idea which one is better...thx again to you all guys who posted to help me :p 
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February 1, 2011 5:01:30 PM

with that budget get a nice p67 motherboard, an i5 2500k, and 8 gigs of ram (since its pretty cheap and you have the budget for it)

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February 1, 2011 6:33:50 PM

why i5 instead of i7?
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February 1, 2011 6:49:19 PM

for gaming the i5 is actually just as good as the i7 and in some instances better, get the k model for an easy oc of well over 4.0ghz on stock voltage
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February 1, 2011 7:05:55 PM

The i7 has hyperthreading, i5 doesn't. For gaming that won't change anything performance wise.

Also, unlike previous gen i cores, the i7s aren't on a high end platform yet, they're on the P67 same as i5 so you don't benefit from more PCIe lanes or anything (which IMO was a main selling point of X58+i7 vs P55+i5)
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February 1, 2011 7:13:48 PM

wolfram23 said:
The i7 has hyperthreading, i5 doesn't. For gaming that won't change anything performance wise.

Also, unlike previous gen i cores, the i7s aren't on a high end platform yet, they're on the P67 same as i5 so you don't benefit from more PCIe lanes or anything (which IMO was a main selling point of X58+i7 vs P55+i5)


well said and thanks for clarifying, imo the 2500k is the clear choice for gaming right now, if I had not purchased an AM3 platform about 8 months ago, I would definatley be upgrading to the p67 and a 2500k right now...
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February 1, 2011 8:01:18 PM

okay guys i am back after trying crossfire on i7 930 2.8ghz on intel dx58so mobo with 4gb ram.I must say difference is huge as compared to q8200.I started from low to high and then advance settings enabling everything including HBOA and vsync and experience was very good.Fps was above 70 on 1920x1080 on high settings which is very good.But only problem i had is that sometimes there is sudden drops in fps like from 120 to 70 and it felt like a so much lag though i tried on different servers but result is same..Even with low settings in bc2 lag or jerk whatever u call is there.One more thing i would like to notify that will i was monitoring cpu usage on other screen the seventh core is almost 96% even 98% while while other cores are above 80%.

Another question which is better choice CF 6950 or goin for high eng gpu like 6970 or some black edition for EYEFINITY???
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February 1, 2011 8:02:57 PM

Best answer selected by mrfrantik.
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February 1, 2011 8:39:28 PM

mrfrantik said:
okay guys i am back after trying crossfire on i7 930 2.8ghz on intel dx58so mobo with 4gb ram.I must say difference is huge as compared to q8200.I started from low to high and then advance settings enabling everything including HBOA and vsync and experience was very good.Fps was above 70 on 1920x1080 on high settings which is very good.But only problem i had is that sometimes there is sudden drops in fps like from 120 to 70 and it felt like a so much lag though i tried on different servers but result is same..Even with low settings in bc2 lag or jerk whatever u call is there.One more thing i would like to notify that will i was monitoring cpu usage on other screen the seventh core is almost 96% even 98% while while other cores are above 80%.

Another question which is better choice CF 6950 or goin for high eng gpu like 6970 or some black edition for EYEFINITY???


You can't really blame a GPU for online FPS. More often than not you get lag from internet/server. Play singple player games, if the FPS is good then definitely the online thing is not fixable on your end. Also, Vsync limits your FPS. If you're really concerned turn it off and if it still happens like that then you know even moreso that it's not your fault. Thirdly, your monitor is probalby 60hz like the rest of us so I'm certain you wouldn't see a difference between 120 and 70.

As for your GPU question, the 69xx series has 2gb memory already. That is sufficient for eyefinity. IMO you could try BIOS flashing your 6950s to the 6970 BIOS. Do it one card at a time tho. And yeah read up on it... google it and you should find a bunch of info on it.

And anyway, there's no way in hell CF 6950s are goign to be beaten by any single card out there. Not even a 5970 is as fast as CF 6950s.

So now you know your CPU/platform is the issue not the cards. You'll either have to upgrade the whole system (CPU, mobo, RAM) or else return one card and just deal with what it gives you.
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February 2, 2011 1:59:57 AM

well yeah now i know gpu is not culprit here and definitely goin to upgrade to i5-2500 and trying to get p67 mobo.Well i tried with vsync on and offlagg is there but i just didn't tried with single player.Well maybe i try when i get new mobo i guess

Thats a relief that my decision for CF6950 is right for eyefinity.

And yes before purchasing i was aware of modding 6950 to 6970 :)  and thats why i bought specially for it .Thank u all guys for helping me and i would say i am pretty happy with CF6950 though right at this moment i am using single gpu only cuz gonn cf after updrading...

Well i am gonna update whichever mobo goin to buy so that i can get advice from u guys again.:)  :hello: 
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February 2, 2011 2:30:21 PM

mrfrantik said:
bad news and maybe u guys already know about it....Intel Sandy Bridge chipset flaw identified.


hmmm thats why its not even available in newegg :whistle: 
http://www.engadget.com/2011/02/01/intel-sandy-bridge-c...

http://www.guardian.co.uk/technology/2011/jan/31/intel-...

now i wonder which cpu and mobo should i go for??or should i wait??? :pfff: 


Well you can't go wrong with an i5 760, but I really doubt it'll take long to get fixed motherboards shipped. In the mean time, have you tried overclocking your current CPU?
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February 2, 2011 3:02:22 PM

i am not good with overlclocking ...last time in try to OC the one system i am using and i doubt that my sound card is burnt because of OCing which was xifi- forte...so now i am not sure...One more thing is i5 760 future proof also?cuz i bought this q8200 back in 2009 May and now it seems outdated...I mean i should be buying such combo which should be good enough for few more years.rest as u say

And advice regarding mobo if goin for i5 760?
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February 2, 2011 3:32:26 PM

I would wait and go get the p67 setup, the i5 760 is great but you might as well wait imo
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February 2, 2011 3:40:39 PM

jjb8675309 said:
I would wait and go get the p67 setup, the i5 760 is great but you might as well wait imo

You mean u would wait one more month for it??I believe it might take this much time though not sure :ange: 
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February 2, 2011 3:42:55 PM

yeah I would wait a month, there were many intel loyals waiting a long time for the relaease of this chip so in reletivity a month is not that long, the i5 is another option but for almost the same money why not wait for the new, faster technology to be worked out then you can really get your 2-3 years worth of use, but that is just my opinion, there are other gaming solutions out there
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February 2, 2011 3:43:49 PM

why not just run one 6950 and a single monitor until a month down the road or whatever then go for your upgrade and reinstate your eyeinfinty
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February 2, 2011 4:06:46 PM

jjb8675309 said:
why not just run one 6950 and a single monitor until a month down the road or whatever then go for your upgrade and reinstate your eyeinfinty


well u got the point and i might delay buying.Actually i had 5870 earlier and i use to play on eyefinity and now playing without it seems handicaped ...its no fun anymore.I will wait n see how long i can bear single monitor,if not then might buy it.But thx for ur advice
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February 2, 2011 5:08:48 PM

This topic has been closed by Mousemonkey
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