Random Crashes (Not CTD)

[Eggs_Zachtly]

I've searched the forums and found similar, but not identical problems to mine. Maybe I missed it. *shrug*

I'm getting apparently-random crashes in Civ IV. They result in a total system lockup, with a blue (color of a BSoD, without text) screen, followed by one or two quick screeches from my speakers. Keyboard is non functional, and no GUI is present. Hard reset is the only way out.

Other than the official patch, no other mods are installed.

System Specs:
-
Mainboard: AOpen AK77-600N
CPU: AMD Athlon(tm) XP 2800+, MMX, 3DNow, ~2.1GHz
Memory: 1024MB PC-3200 DDR-SDRAM

Display 1: RADEON X800 Series 256.0 MB
Chip type: RADEON X800 XT AGP (0x4A4B)
Driver Version: 6.14.0010.6497 (English)
Primary Monitor: Dell P990 (1152 x 864 (32 bit) @100Hz)

Display 2: Matrox G450 32MB
Driver Version: 5.12.0001.1720 (English)
Secondary Monitor 1: CTX VL-700 (1152 x 864 (32 bit) @75Hz)

Display 3: Matrox G450 DualHead
Driver Version: 5.12.0001.1720 (English)
Secondary Monitor 2: ViewSonic E55 (1152 x 864 (32 bit) @75Hz)

DirectX Version: DirectX 9.0c (4.09.0000.0904)

Audio: SB Audigy 2 ZS Platinum
Driver Version: 5.12.0001.0402 (English)

Hard Drive C:
Samsung SV6003H 59GB @7200rpm
Operating System: Windows 2000 Professional (5.0, Build 2195) Service Pack 4

Drive D:
_NEC DVD_RW ND-3550A

Hard Drive E:
Dedicated Swap
Samsung SV6003H 1024GB @7200rpm

Drive: F:
Model: SONY DVD RW DRU-820A

Drive G:
Samsung SV6003H 59GB @7200rpm

Secondary displays are disabled, when playing Civ IV. In-game graphics settings are 1024x768 (lower than desktop res).


If any other info is needed, just say what, and I'll do my best to find it. Thanks.