Page File - this one is buried reeeeaaal deep
- My Computer icon (top left of desktop) - right click
- select properties
- Click advanced tab
- Find "performance top of that mini screen - look right click settings
- click advanced tab
- look bottom right - click change
- click custom size button
- enter 2000 in both the "Initial " & "Maximum Size" boxes
- click set
- click ok at the bottomof each screen as they appear until you are back to the desktop
The Pagefile is a temporary area that the windows operating system uses to dump temporary data (eg in a huge map game or late game main & video ram maybe too small to cope, so the system & (some)graphics are chopped into chunks and temporarily stored in this pagefile, and the game swaps them in and out as its needs it. Downside is that its slows things as disc access is far far slower than memory access. However it is essential in large games like Civ or memory corruption can start (maybe your problem) or it can crash. Longshot in your case, but worth doing anyway - everyone playing Civ should set this to 2000mb min=max at least (min=max to stop it fragmenting)
Getting near the end of the "hit list". Ini file changes:
(The ini file is in C:\Documents and Settings\New User\My Documents\My Games\Sid Meier's Civilization 4\CivilizationIV.ini (ini file name can change Country to Country - as long as its in that directory, fine open it in Notepad (not wordpad)
Scroll down and set the settings below to read the same in the ini file
; Sync input to smooth interface (may run slower)
SyncInput = 0
; Allow Camera Flying
AllowFlying = 0
; Allows some memory savings *** ALT-TAB WILL NO LONGER FUNCTION ***
MemSaver = 0 (ESSENTIAL do NOT set to 1, you need it off, so it does not place more work on the graphics card
; Use managed interface textures (may be safer but shouldn't be needed, uses more memory)
GUIManagedTextures = 0
; Allow Screenshots. May affect performance on some video cards
AllowScreenShots = 0 (will disable ability to take screen shots in game)
; Show movies using hi-color, not true-color (may be faster)
Bink16Bit = 1
; Copy ever other scanline during movie playback (faster)
BinkInterlace = 1
; Specify whether to play in fullscreen mode 0/1/ask
FullScreen = 0 (try set to 1, has been a winner for some, 0 is windowed mode)
Press save in Notepad
If the above dont work - out of options, and you will likely only see improvement post next patch(maybe) or with an upgraded card. Whats happening is the card is just a little low for the game, and cant quite sort out parts of the game - its only just over the edge, a small change will crack it - hence the small tweeks.
After this, if it really annoys you, your only option is to get a mid range card. GeForce 6600gx/gt (with a fan not passive cooling) would be a good choice. Check with manufacturer that the card will not cause heating issues / will work on that motherboard before buying
Regards
Zy