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george176

VRam issue

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I'm having performance issues with Arma 2 OA (running as CO). I only get around maybe 20-25 fps average and I get annoying texture pop-in as well. On the benchmark I get 21 fps, and in the mission Counterattack for example it averages around 25 fps. Here are my settings:

Everything on v. high

PP on normal

View distance: 3000 (tried messing around with this but didn't seem to have much of an effect)

AA: normal

Hdr: normal

Video memory: I've tried default and v. high - no difference

resolution: 1680x1050

3d resolution: 150%

Specs:

Intel i7 980, 3.6ghz

Ati Radeon 5970, 2gb

12gb ddr3 ram

300gb hd, 10k rpm

In the config, my vram is reported as 385974208 and non local vram is reported at the same. Calculating that into megabytes, it only comes out to about 216 mb. Why isn't Arma detecting the right vram settings? Is that why I'm getting such low performance?

I've read about this and I know it's been covered but I haven't found a definitive answer/solution. It seemed to be addressed in a patch but if I'm running the steam version, shouldn't I already have that patch?

I've also tried various switches, maxmem, threadcount, etc. with no effect.

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forgot to mention - I'm using the catalyst 10.12 drivers and win7 64 bit.

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3d resolution: 150%

would cause me probs - I always run it at 100%

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I tried changing the video resolution to 100% and it definitely helped, but I'm still concerned about the vram value that shows up in the config. It's still the wrong number. Why doesn't it properly detect the amount of vram I have?

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I switched to the catalyst 10.4 drivers and vram detects properly, performance still seems sub par though. Not really sure what else to do.

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check with gpuz if your card run with 3d clock in game ?

Also make sure both gpu are used ? but even if only one was working the perf shouldnt be that low.

Also make sure you dont have any streaming video like youtube in the background,when i have a youtube page open, it cuts my performance by half on a hd5870.

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When I use the -winxp switch, arma uses both gpus.

No streaming video.

What do you mean about 3d clock?

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when your card is in idle the gpu and memory clock should be 157/300 mhz (2d clocks) and when you start a game the clocks should switch to 725/1000 mhz (3d clocks) for both gpus.

Do you have any other games/benchmarks to know if the performance problem is only with arma ?

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After some testing, I've discovered that Arma 2 doesn't detect vram properly with 10.10 and 10.12 drivers, but it works with 10.4. I'd like to use newer drivers because of CF support for OA but the ones I've tried have this vram issue.

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  george176 said:
After some testing, I've discovered that Arma 2 doesn't detect vram properly with 10.10 and 10.12 drivers, but it works with 10.4. I'd like to use newer drivers because of CF support for OA but the ones I've tried have this vram issue.
well to get CF OA support on the 10.4a(recommend the a, version)rename the arma2oa.exe to arma2.exe. There is no extra driver love for OA, between 10.4 or 10.8 just a just a tag for the CF. The Vram thing has been around for awhile and changes from patch to patch and driver to driver...

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I ran gpu-z and the clocks do go up when in game from 157/300 to 725/1000.

I've tried crysis and stalker: call of pripyat on this rig with no problems - i can max all the settings and fps will rarely drop below 40-45. It's just this game that's giving me problems.

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Setting 3D resolution at 150% and using AA on normal is useless.

Setting 3D resolution upper than 100% activate FSAA (Full Scene Anti-Aliasing) and you are using also MSAA (Multi Sample Anti-Aliasing) on it !

Keep only one of it and retry ! ;)

Tips : FSAA is heavier than MSAA but you get a sharper render for sure.

For the wrong video RAM in the settings, i wouldn't care about it (part of the VRAM is allocated to the OS i suppose)

Edited by Paul-Hewson

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This is a nasty bug.

I own 6870 Crossfire so i'm effectively screwed because the earliest drivers my cards support are the 10.10s.

10.12 the issue remains.

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tried the 10.12a hotfix for 6xxx ?

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you sure? quite often hotfix has the .inf entries for other cards in serie ...

(not tried this one myself was just quick tip i got from AMD testers)

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10.12a works on my 4870x2's. it should work on all cards, even though it says 6900 something or other. Its the newest driver ATI has out. and if your game you can modify infs for any card to run on a driver.

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