Need help with Arma 2 please :)

To be honest, I don't own the game, but I'm sure google can help you, just search "Optimizing Arma II" or "Tweaking Arma II". Hopefully this helps you, if not, I'm sorry I can't do much more

Basically, ARMA2 should be unplayable on this card.
Of course, you can try going all the way down with the graphic settings.
Check this guide out for some general tips, but as I said, I think it will still be unplayable (I'm on a laptop with i7 2670QM, 8GB RAM and a GT540M, and I play on low-medium settings, and I still have performance issues)
If you have any specific questions, ask.

"lag" "lag" "lag" "lag" "lag".
You seem to spend a lot of money on games, if you want to, we can talk on steam and you can spend around 60$ to play games at higher fps, without "lag"

http://forums.bistudio.com/showthread.php?88388-Here-s-how-I-got-ARMA2-to-perform-smoothly-using-RAMDISK - This brought about 15-20 fps on my MacBook Pro 17" Mid 2009 (2,66 Core2Duo, 8gigs of RAM, GeForce GT9600M 512mb)

I don't understand why you would want to buy this when you know you can't play it on laptop GPU.

You can try these tips. Under memory, choose default and turn off both post processing and ATOC. Lastly reduce your view distance.

btw I have some FPS drops in it too!On DayZ outside of cities I have 45 FPS all on max(with AA on High) and when I get in cities 20 fps...WTF...I lower the settings all on LOWEST POSSIBLE and fps increases with well..0 FPS O.o seriously wtf?btw it has notting to do with my rig...I must be able to play on high without any trouble but...well...NO

The biggest cause of "lag" aka loss of FPS in ARMA is going to be your draw distance. With a high end rig, you can run to 10km view distance (best for helicopter engagements or HALO drops). On a low end, keep your view distance to 100-300 meters. In addition, turn all your settings down to the lowest.

My first time playing was on an 8800GTS overclocked and I was able to run on medium settings (post processing turned off I think) with range at 6-7km and it only dropped frames when I spun around really quickly, but only for a fraction of a second.

Hope that helps, feel free to add me on steam to ask more questions...I probably will miss anything you post here.

-Pandoz

Just talked to him, his desktop is broke and doesn't really have the money to fix or upgrade it.
so increasing hardware is out of the question. good luck tweaking the game.

Take a look at this, I know it says DayZ but it's just Arma. Guide It helped my fps quite a bit reading through it and doing as it says.

Not sure if getting a new harddrive will decrease the lag