Windows 7 Ruins Performance :(

When I was running 32 bit Vista on my HP Elitebook 8530p, Arma performed better than I expected. I could play Chernarus with nearly full view distance or fill it with two hundred AI, and framerate was playable if variable. (I never actually looked at the exact numbers).

Now that I have upgraded to Windows 7 with a clean install (retaining ACEX), performance is terrible. Chernarus FPS only approaches borderline territory with nil view distance, while Utes is quite smooth. I appear to have lost the ability to handle drawing terrain. I have yet to test an AI-heavy mission.

Has anyone else experienced a Windows 7 downgrade? After the clean install, this laptop should be spotless.

Below is the system sepcs part of my dxdiag. I am patched to 1.05 and Windows claims that my GPU drivers are up to date.

Would setting up a RAMdisk help?

Edit: DxDiag left out my GPU, which is an ATI Mobility Radeon 3650.

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System Information

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Time of this report: 12/30/2009, 21:05:02

Machine name: MICHAEL-PC

Operating System: Windows 7 Professional 32-bit (6.1, Build 7600) (7600.win7_rtm.090713-1255)

Language: English (Regional Setting: English)

System Manufacturer: Hewlett-Packard

System Model: HP EliteBook 8530p

BIOS: Default System BIOS

Processor: Intel® Core2 Duo CPU T9400 @ 2.53GHz (2 CPUs), ~2.5GHz

Memory: 4096MB RAM

Available OS Memory: 3036MB RAM

Page File: 1175MB used, 4894MB available

Windows Dir: C:\Windows

DirectX Version: DirectX 11

DX Setup Parameters: Not found

User DPI Setting: 96 DPI (100 percent)

System DPI Setting: 120 DPI (125 percent)

DWM DPI Scaling: Disabled

DxDiag Version: 6.01.7600.16385 32bit Unicode

When I upgraded from Vista x64 to Win 7 x64 my perfromance experienced a huge improvement. Others also shared this experience :).

However, I can´t give you a proper explanation for your case.

Not many people running ArmA2 on the laptop, but try to install the game on another drive then OS is, and you have too little RAM to make a RAMDisk.