Sim city 4 lags

There are some parts of the game that slows down the performance even though i met the requirements of the game ..

Here are the hardware specs:

OS Name Microsoft Windows XP Professional
Version 5.1.2600 Service Pack 2 Build 2600
OS Manufacturer Microsoft Corporation
System Name LEDESMA
System Manufacturer ECS
System Model K7S5A
System Type X86-based PC
Processor x86 Family 6 Model 7 Stepping 1 AuthenticAMD ~1195 Mhz
BIOS Version/Date American Megatrends Inc. 07.00T, 4/2/2001
SMBIOS Version 2.3
Windows Directory C:\WINDOWS
System Directory C:\WINDOWS\system32
Boot Device \Device\HarddiskVolume1
Locale United States
Hardware Abstraction Layer Version = "5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)"
User Name LEDESMA\Default1
Time Zone Central Daylight Time
Total Physical Memory 768.00 MB
Available Physical Memory 451.97 MB
Total Virtual Memory 2.00 GB
Available Virtual Memory 1.96 GB
Page File Space 966.25 MB
Page File C:\pagefile.sys

thanks