Please let us know in note section if you are still able to reproduce this issue in latest Development build.

If so, please send us dxdiag and files from this folder: "C:\Users\<Name>\AppData\Local\Arma 3 Alpha\"

Can you pack the files in winrar and upload it somewhere?
When the *.rar will be smaller than 2.097k, you can attach it here. Thank you.

For future reporting please refer to "how to guide" http://feedback.arma3.com/how-to-user.html.html

I have a high end system and to be honest, My PC chokes playing Arma 3. Especially when there are several AI in a scene and explosions. It is so annoying. This is not working out. And the frame rates suck. Skip skip, skip, when the action heats up. It is almost a disaster and I am running:

Operating System: Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130318-1533)
        Language: English (Regional Setting: English)

System Manufacturer: System manufacturer

System Model: System Product Name
        BIOS: BIOS Date: 08/02/11 14:36:59 Ver: 08.00.15
   Processor: Intel(R) Core(TM) i7 CPU         960  @ 3.20GHz (8 CPUs), ~3.2GHz
      Memory: 24576MB RAM

Available OS Memory: 24568MB RAM

      Page File: 5800MB used, 43331MB available
    Windows Dir: C:\Windows
DirectX Version: DirectX 11

DX Setup Parameters: Not found

User DPI Setting: Using System DPI

System DPI Setting: 96 DPI (100 percent)

 DWM DPI Scaling: Disabled
  DxDiag Version: 6.01.7601.17514 32bit Unicode
      Card name: AMD Radeon HD 7900 Series
    Manufacturer: Advanced Micro Devices, Inc.
       Chip type: AMD Radeon Graphics Processor (0x6798)
        DAC type: Internal DAC(400MHz)
      Device Key: Enum\PCI\VEN_1002&DEV_6798&SUBSYS_0B001002&REV_00
  Display Memory: 4095 MB
Dedicated Memory: 3037 MB
   Shared Memory: 1058 MB

Closing due to lack of info / response.

If the issue is still reproducable for you, please create a ticket for it.