Here's my min spec pc that will play AH .... 
its a 866mhz pent 3 /370 pin 
512 ram
geforce 2 mx 400 64 mb agp video card
you need this much machine at a min ...and even this is pritty slow 
------------------
System Information
------------------
Time of this report: 7/19/2007, 13:21:51
       Machine name: POS-PENT
   Operating System: Windows XP Home Edition (5.1, Build 2600) (2600.xpclient.010817-1148)
           Language: English (Regional Setting: English)
System Manufacturer: n/a
       System Model: n/a
               BIOS: Award Medallion BIOS v6.0
          Processor: Intel Pentium III processor, ~860MHz
             Memory: 512MB RAM
          Page File: 114MB used, 1136MB available
        Windows Dir: C:\WINDOWS
    DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
     DxDiag Version: 5.03.0001.0904 32bit Unicode
---------------
Display Devices
---------------
        Card name: NVIDIA GeForce2 MX/MX 400
     Manufacturer: NVIDIA
        Chip type: GeForce2 MX/MX 400
         DAC type: Integrated RAMDAC
       Device Key: Enum\PCI\VEN_10DE&DEV_0110&SUBSYS_00000000&REV_B2
   Display Memory: 64.0 MB
     Current Mode: 1024 x 768 (32 bit) (75Hz)
          Monitor: COMPAQ Presario MV700 Color Monitor
  Monitor Max Res: 1280,1024
      Driver Name: nv4_disp.dll
   Driver Version: 6.14.0010.5672 (English)
      DDI Version: 9 (or higher)
Driver Attributes: Final Retail
 Driver Date/Size: 3/24/2004 10:04:00, 4274560 bytes
    -------------
Sound Devices
-------------
            Description: Creative Sound Blaster PCI
 Default Sound Playback: Yes
 Default Voice Playback: Yes
            Hardware ID: PCI\VEN_1274&DEV_5880&SUBSYS_AFFFFFFF&REV_02
        Manufacturer ID: 1
             Product ID: 100
                   Type: WDM
            Driver Name: es1371mp.sys
         Driver Version: 5.01.2501.0000 (English)
      Driver Attributes: Final Retail
            WHQL Logo'd: n/a