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6950 Crossfire issue

metilic

New Member
Joined
May 17, 2011
Messages
35 (0.01/day)
Location
Bucharest, Romania
Processor Intel Core i5 @4.0 Ghz, 1,3 vcore
Motherboard Gigabyte GA-P55-UD4
Cooling Prolimatech Megahalems rev.B and Arctic Silver MX-2
Memory 2x4Gb Kingston Hyper-X 1600 Mhz
Video Card(s) Sapphire HD6950 2gb + HIS HD6950 2gb
Storage Samsung Spinpoint F3 1Tb 7200rpm 32Mb buffer
Display(s) Samsung 223bw 22''
Case Antec 300 3x120 and 1x140 fans
Audio Device(s) Creative X-Fi Xtreme Audio
Power Supply Antec 750W
Software Windows 7 x64
I recently got a second 6950 2 gb added to my system and started testing games. They scale very good in games like Starcraft 2, Warhammer Space Marine, Crysis 2, Metro 2033 or AVP. The problem is with Bad Company 2, where my frame rate goes from 40 to 80 to 110 and then back and so on. Another thing that i experience is some mouse lag in the game if V-Sync is ON. With V-Sync OFF this does not happen at all. Hope you guys can help me with this frame rate and lag issue.

P.S. I had the same issues in BC2 with both 11.10 (preview 1 and 2) and 11.9 which I'm currently using. I disabled ULPS and I game at 1680x1050.
 

cadaveca

My name is Dave
Joined
Apr 10, 2006
Messages
17,232 (2.63/day)
Most likely that's an artifact of the CPU you are using. Multicard configs really benefit from high memory bandwidth, that the P55 platform just isn't capable of.
 

brandonwh64

Addicted to Bacon and StarCrunches!!!
Joined
Sep 6, 2009
Messages
19,542 (3.67/day)
Dave is right, I5 dual core may not be up to par with the two massive cards. You may need to look into a i7 870 used to help out those cards
 

metilic

New Member
Joined
May 17, 2011
Messages
35 (0.01/day)
Location
Bucharest, Romania
Processor Intel Core i5 @4.0 Ghz, 1,3 vcore
Motherboard Gigabyte GA-P55-UD4
Cooling Prolimatech Megahalems rev.B and Arctic Silver MX-2
Memory 2x4Gb Kingston Hyper-X 1600 Mhz
Video Card(s) Sapphire HD6950 2gb + HIS HD6950 2gb
Storage Samsung Spinpoint F3 1Tb 7200rpm 32Mb buffer
Display(s) Samsung 223bw 22''
Case Antec 300 3x120 and 1x140 fans
Audio Device(s) Creative X-Fi Xtreme Audio
Power Supply Antec 750W
Software Windows 7 x64
Well it's quad not a dual core :) And it's overclocked at 4,0 Ghz from 2,66. And everything is perfectly fine in several games, scaling there is great. Just in this game it sucks bad :( Any more ideas?
 

cadaveca

My name is Dave
Joined
Apr 10, 2006
Messages
17,232 (2.63/day)
Well it's quad not a dual core :) And it's overclocked at 4,0 Ghz from 2,66. And everything is perfectly fine in several games, scaling there is great. Just in this game it sucks bad :( Any more ideas?

BC2 is notorious for high CPU load. if everything else works fine, and synthetic benchmarks do nto show an issue, then CPU it is, unfortunately. It's not that your CPU is bad, jsut bad for that specific app running multicard.

I went through the P55 platform with BC2 myself, first with i5 760 @ 4GHz, then i7 870. In January I swapped over to SandyBridge, and haven't looked back.
 

brandonwh64

Addicted to Bacon and StarCrunches!!!
Joined
Sep 6, 2009
Messages
19,542 (3.67/day)
Dave is right on these. he has test almost every platform and setup for a while now. I used a Xeon X3430 (I5 750 server version) and it was good for BC2 with one 4870 but with two it acted very funny and had unplayable issues
 

metilic

New Member
Joined
May 17, 2011
Messages
35 (0.01/day)
Location
Bucharest, Romania
Processor Intel Core i5 @4.0 Ghz, 1,3 vcore
Motherboard Gigabyte GA-P55-UD4
Cooling Prolimatech Megahalems rev.B and Arctic Silver MX-2
Memory 2x4Gb Kingston Hyper-X 1600 Mhz
Video Card(s) Sapphire HD6950 2gb + HIS HD6950 2gb
Storage Samsung Spinpoint F3 1Tb 7200rpm 32Mb buffer
Display(s) Samsung 223bw 22''
Case Antec 300 3x120 and 1x140 fans
Audio Device(s) Creative X-Fi Xtreme Audio
Power Supply Antec 750W
Software Windows 7 x64
Final question: would changing the monitor with another one with a 1920x1080 resolution take the weight off the CPU a little bit and help with the scaling? I read that increasing the resolution moves the importance towards the GPU(s).
 

cadaveca

My name is Dave
Joined
Apr 10, 2006
Messages
17,232 (2.63/day)
Final question: would changing the monitor with another one with a 1920x1080 resolution take the weight off the CPU a little bit and help with the scaling? I read that increasing the resolution moves the importance towards the GPU(s).

Possibly...not entirely sure. I could run some tests, I suppose. Give me a few days to finish the review I'm working on, and I'll post up some numbers.
 

metilic

New Member
Joined
May 17, 2011
Messages
35 (0.01/day)
Location
Bucharest, Romania
Processor Intel Core i5 @4.0 Ghz, 1,3 vcore
Motherboard Gigabyte GA-P55-UD4
Cooling Prolimatech Megahalems rev.B and Arctic Silver MX-2
Memory 2x4Gb Kingston Hyper-X 1600 Mhz
Video Card(s) Sapphire HD6950 2gb + HIS HD6950 2gb
Storage Samsung Spinpoint F3 1Tb 7200rpm 32Mb buffer
Display(s) Samsung 223bw 22''
Case Antec 300 3x120 and 1x140 fans
Audio Device(s) Creative X-Fi Xtreme Audio
Power Supply Antec 750W
Software Windows 7 x64
Cadaveca you're the man :D I'm looking forward to your feedback, thanks dude :)
@Brandonwh64 It's a little over my budget right now, maybe in 4-5 months if i get a good price for my cpu and mobo.
 
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