about 2 months ago I bought a new Desktop, to be up to date with the gaming industry.
This is my new updated gaming rig:
2 x Radeon HD6970 (XFX) - GPU
P8P67 B3 - Motherboard
Intel Core i7 2600k @ 3.4Ghz - CPU
2 x 4GB Vengeance - RAM
Corsair TX850W - Power supply
Scythe Mugen 3 - CPU Cooler
2000GB 64MB SATA600 7200rpm - HDD
120GB Solid State Drive
Phantom NZXT - Case
And 3 x ProLite E2473HDS iiyama monitors
so as you can see I am running in eyefinity.
Now, the problem is (atleast imo) I can't run battlefield properly with full res en lowest settings without lagging, if I go higher I still get decent FPS but I get micro stuttering, E.G on high I get an average of 40 FPS, but I lag like hell.. So I don't know if you guys think my cards just can't handle it?
and then 1 more thing, when I set a preferable screen in CCC there will always be small lines in my screen, for example if I take my middle screen as prefered screen, my 2 outer screens will have 2 small lines in the middle, while gaming or while on desktop.. I have been reading the forums, people say that its just the 6XXX series, is this correct?
Says your motherboards second PCI-E slot runs at 4x..... so you aren't running at 8x-8x.... your running at 16x-4x... That is probably killing your crossfire speeds.
Crossfire is very problematic with micro stuttering... Some people get it, others don't... crossfire is not 100% perfect(yet). I don't think it is limited to ONLY 6xxx series...
You should be able to get pretty decent frame rates using 1 6970.... Can you test how well that runs with 1 card...? Eyefinity takes a pretty hefty toll on cards, so don't expect 1080p 60 FPS(at least not on one card) - although 2 cards should run really well. What is your resolution?
I'm not the greatest "shopper".... I can suggest some, but you would be better off starting a new thread with your PC specs, what you want to do and how much you are willing to spend..... and ask some of the other guys to give you some suggestions.
Just trying to be honest and get you the best answer...
Horizontal? Only on the "outer" monitors? what if you change the default "middle" monitor in CCC(don't physicaly move the monitors).... does it move the lines to the other monitors? Always in the same spot?
How are you running eyefinity with those monitors? They don't have a Native DP connection... you would need an Active DP adapter.... Are you using one?
Also, it looks like your monitors have something called 'Overdrive'...? Go into your monitors menu settings and mess around with that.... maybe do a "Default" and see if your lines go away. See if the lines show up when you only use 1 GPU...? (When you get your PC back)
So when I say I prefer my middle screen as a main screen, the 2 outer screens give me the 2 lines
when for instant I use the right screen, its only in the middle, so that the 2 outer screens don't have a problem.
yep, horizontal, and depends on what my prefered screen is I set in, in CCC.
and yes I am using a passive DP Adapter, do you think an active will solve it?
The 6970 can only physically power up to 2 monitors. AMD states you need an active adapter for number 3. I tried 3 monitors with a passive dongle and it was hit or miss as to whether or not the third monitor would even power up so i bought an active dongle from newegg for about $30. BF3 is a resource pig! With my 6990 in ultra at 5760x1080 I get about 40FPS with 4xMSAA and it has noticable lag. Try turning off AA. It will give you the biggest performance increase. I find that below 45FPS bf3 starts to show undesirable effects. I play with trifire 6990+6970(currently bf3 does not like my second 6970 so I have to disable it for this game only) and with AA off I get an average of about 77FPS and 60FPS with 4xmsaa. I would say that your framerates are what you should expect to see but it should not be micro stuttering. Are you using the version 11.12 drivers?
The reviews are hit and miss but I have not had any issues so far. There is also a sapphire brand for the same price at newegg. I beleive you can get one that has a usb cable to draw power from that port but it is about $120 at futureshop. I can't say which is better but the $30 adapter works for me.
I used the Sapphire adapter for $26 on Newegg and it worked fine. Make sure you get the right one... i.e. Mini-DP or regular DP... not sure what your card has for output.
Definitely sounds like your passive DP adapter is having problems.... Get an active one for $30 or less from Newegg and test it out.
When you get your PC back, tweak the graphics settings like alrobichaud said and see if you get any noticeable FPS difference.... if not, look into a motherboard with 8x-8x CrossFire.(I am not certain that motherboard is causing your Lag issue, but from what the website says it runs at 4x mode)