Hardware Specs
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Thermaltake Armor Series VA8003BWS Black Full Tower Case w/ 25CM Fan | Gigabyte EX58-UD5 | Intel Core I7 920@3.78Ghz | Noctua NH-U12P SE1366 120mm SSO CPU Cooler | 12GB OCZ Platinum DDR3 1600 OCZ3P1600LV6GK | Intel X-25MG1 80GB, 5 x 1 TB WD Caviar Black, 2 TB WD Caviar Black | 2 x XFX 5870 | BFG Tech EX-1200 BFGR1200WEXPSU 1200W Continuous Rated at 40°C ATX12V 2.2 / EPS12V 2.91 SLI Ready CrossFire Ready 80 PLUS Certified Modular Active PFC Power Supply | BenQ 2400WD DVI, Lenovo ThinkVision 2440X DisplayPort, Samsung 2433BW DVI
Software
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Catalyst 11.3 CAP1(default settings)
Crysis2 1.1(Steam latest)
Like many here I had some issues with Crysis2 flickering or just not performing while using crossfire. I'm running Crysis2 @ 5292x1050, V-sync off, Extreme Settings. I can confirm that the latest 11.3 with CAP1 does indeed fix the flickering issue while using crossfire. However it doesn't always work I found that sometimes you would have to die and load last save point before it would come into affect. Anyway here are some basic performance numbers from the location pictured below. I would come in from save point in tunnel spin around a couple times to give crossfire a chance to load up and balance out, then continue through tunnel and kill the alien with a few shots then use the explosive barrel to finish him off. Then I would place myself next to the column on the wall looking at the panel on the far wall while cloaked.
http://www.brandoneubanks.com/Images/Crysis2PerformanceComparisonAimpoint.jpg
Using RadeonPro
http://www.radeonpro.info/en-US/
settings:
http://www.brandoneubanks.com/Images/RadeonPro-Advanced.jpg
http://www.brandoneubanks.com/Images/RadeonPro-Tweaks.jpg
Results(as measured with RadeonPro built in API)
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Forced Bioshock Profile:
-No flickering
-FPS of 47-50
Forced Fear Profile:
-No flickering
-FPS of 37-43
-Crossfire doesn't seem to be scaling as well as default or bioshock profile
No Forced Profile(CAP defaults):
-On first load Flickering present
-FPS 45-47
-On dying and reload No flickering
-FPS 47-50
Kill RadeonPro and RadeonPro Support Service with Taskman measure FPS with FRAPS 3.4.0:
-No Flicker
-FPS 24-25
-Possibly crossfire being disabled? GPU-Z reports both GPU's are being utilized but performance is being cut in half not sure what's going on here
Hopefully that gives someone a place to start. Personally I'll be using RadeonPro with Bioshock profile forcing until this situation is resolved. Now if we could just get the Nano Catalyst reset bug fixed it would be all good. It seems there are two versions of this nano catalyst bug which I have myself seen. In one instance my catalyst was reset but I was still able to collect more. And was able to use Cheat Engine to get back what I had lost
http://forums.steampowered.com/forums/showthread.php?t=1809689
Now it seems that I have beaten the game, I have all of the nano suit upgrades that I had bought but now can't collect any more nano catalyst. It says I pick it up but nanosuite upgrade panel never shows it incrementing upward just stays at 0. Not sure if that's by design or just a bug. Anyway good luck to all of you out there
[update] 4/14/2011
11.3 CAP3
Crysis 1.2(Steam Latest)
Cap 3 isn't there yet the flickering is gone for sure(without having to die before it sometimes starts working). In parking garage MP @ 1920x1200 forcing Bioshock profile w/ RadeonPro i'm seeing a FPS consistantly at/above 60 FPS. With CAP 3 i see those types of framerate only when in the stairwell otherwise it's 30-45 FPS in the garage parking deck for example.