Extreme lag with new computer?

[GTA~SanAndreas~GTA 0]

Hi. I used to run the game just fine with:

Pentium 4 HT 3.2Ghz

8800GTS 512mb

2GB Ram

Vista Ultimate

Some el-cheapo motherboard.

640GB hard drive

Now I have:

Quad Core Q9450 3Ghz

Nvidia GTX 260

4GB Ram

Vista Ultimate

High-End mobo [striker II Formula]

640gb hard drive

and I get about 1-10 FPS. Its fine if i'm not moving or in the regional view, but if I go into a city, it stutters so bad I cant even play. RAM usage is only 36% and CPU is under 25% through out. Any ideas?

Oh, and temps are fine too.

GPU = 46C

CPU = 28C

Software rendering does the same thing.

I have just  a few plugins, which hasn't changed since getting a new PC

[JakeMD 107]

What helped with me, is turning the renderer to Software.

[Livin in Sim 83]

Hi, GTA~SanAndreas~GTA,

Since you said setting to software rendering was the same, with more than one core, it might help to set the affinity so the game uses just one processor.  I only know this from reading in the forums--here is a copied section of a post:

Have you tried setting your game to 1 CPU?

You can set this by going to the properties of your SimCity.exe and adding the -"" to the Target area.

Example:

"C:\Program Files\Maxis\SimCity 4 Deluxe\Apps\SimCity 4.exe" -CPUCount:1quote>

Oh, and someone else said he disabled PhysX, whatever that is. 

Just tryin' to think of things I've read.

--Liv

[GTA~SanAndreas~GTA 0]

Thanks. Doing both of those together fixed it .