I have a gateway AMD 9500 Quad core 2.20 Ghz 3.00

You may be able to install a quad core processor on your motherboard, will need the model to check.
You can't make new cores out of nothing though.

Most probably your hardware ie graphic card do not support software requirements.

Autocad 2009 system requirements for Win XP.
32-bit AutoCAD 2009
Running under Windows XP:
•Microsoft Windows XP SP2 operating system
•Intel® Pentium® 4 processor or AMD Athlon®, 2.2 GHz or greater
or
Intel or AMD Dual Core processor, 1.6 GHz or greater
•1 GB RAM
•750 MB free hard disk space for installation
•1024x768 VGA with true color
•Microsoft Internet Explorer 6.0 (SP1 or higher)
If you are using AutoCAD for 3D modeling, you should bump up your system as follows:
•Intel Pentium 4 processor or AMD Athlon, 3.0 GHz or greater
or
Intel or AMD Dual Core processor, 2.0 GHz or greater
•2 GB RAM or greater
•2 GB of additional free hard disk space
•1,280 x 1,024 32-bit color video display adapter (true color) 128 MB or greater, OpenGL or Direct3D capable workstation class graphics card.

Hope it helps.

If your computer has RAM memory more than 1 GB then you can install windows 7 onto it without any problem.

Thanks

Minimum System Requirements
OS – Windows XP or Windows Vista
Processor – 2.8 GHz or faster (XP) or 3.2 GHz or faster* (Vista)
Memory – 1.0 GB RAM (XP) or 1.5 GB RAM (Vista)
Video Card –256 MB**
Hard Drive – 12GB
Sound Card – DirectX 9.0c compatible
* Supported Processors: Intel Pentium 4 2.8 GHz (3.2 GHz for Vista) or faster, Intel Core 2.0 GHz (2.2 GHz for Vista) or faster, AMD Athlon 2800+ (3200+ for Vista) or faster.
** Supported chipsets: NVIDIA GeForce 6800 GT or greater; ATI Radeon 9800 Pro (Radeon X800 Pro for Vista) or greater. Laptop versions of these chipsets may work but are not supported. Integrated chipsets are not supported. Updates to your video and sound card drivers may be required.
Recommended System Requirements
OS – Windows XP / Vista
Processor – Intel Core 2 DUO @ 2.2GHz or AMD Athlon 64 X2 4400+
Memory – 2.0 GB RAM
GPU – NVIDIA GeForce 8800 GTS/640 or similar

Bro follow this steps. 1. click windows " Start " button beside your Taskbar. 2. select "Run". 3. type " cmd ". 4. type " chkdsk /f " to repair your entire system errors. 5. your done.

Hi friend The SIMS 3 minimum hardware requirements are:
1. FOR WINDOWS XP
* Windows XP (Service Pack 2)
* 2.0 GHz P4 processor or equivalent
* 1 GB RAM
* At least 6.5 GB of hard drive space with at least 1 GB additional space for custom content
* 128 MB Video Card with support for Pixel Shader 2.0

2. FOR WINDOWS VISTA
* Windows Vista (Service Pack 1)
* 2.4 GHz P4 processor or equivalent
* 1.5 GB RAM
* At least 6.5 GB of hard drive space with at least 1 GB additional space for custom content
* 128 MB Video Card with support for Pixel Shader 2.0
For computers using built-in graphics chipsets, the game requires at least:
* Intel Integrated Chipset, GMA X3000 or above.
* 2.6 GHz Pentium D CPU, or 1.8 GHz Core 2 Duo, or equivalent
* 0.5 GB additional RAM

SUPPORTED VIDEO CARDS


NVIDIA GeForce series
FX 5900, FX 5950
6200, 6500, 6600, 6800,
7200, 7300, 7600, 7800, 7900, 7950
8400, 8500, 8600, 8800
9600, 9800, GTX 260, GTX 280

OR

ATI Radeon™ series
9500, 9600, 9800
X300, X600, X700, X800, X850
X1300, X1600, X1800, X1900, X1950
2400, 2600, 2900
3450, 3650, 3850, 3870,
4850, 4870


OR

Intel® Extreme Graphics
GMA X3x00 series

Please cross check your system with this requirements and upgrade accordingly.

I hope this will help you out. Plz vote for me.
Thanks

There seems to be some sort of incompatibility issue between your motherboard and the Phenom, or maybe some option is not enabled in the motherboard bios that windows is only sensing half of the GHz, like if the processor is only running 2 cores instead of 4.

About the memory diference, that same problem is because the 64bit difference. Unless you have a 64bit XP you won't see the full 4GB. Windows XP is limited to 3 or 3.5GB of ram it can use, you are showing 2.75 maybe because some video board is integrated in your motherboard and it may be borrowing an extra 0.25GB from the 3GB that are usable under windows XP 32bit OS.

Please comment what motherboard you have, since the cpu alone can't be blamed nor configured.

heres more info on the game
http://en.wikipedia.org/wiki/Crysis

Operating System - Windows XP or Windows Vista
CPU Minimum - 2.8 GHz or faster for XP, 3.2 GHz or faster for Vista

cpu Recommended - Intel Core 2 Duo @ 2.2 GHz, or AMD Athlon 64 X2 4400+

Memory - 1 GB RAM for XP, 1.5 GB RAM for Vista
Recommended - 2 GB RAM

Hard Drive Space - 12 GB of free space

Minimum Graphics Hardware - 256 MB video memory, NVIDIA GeForce 6800 GT/ATI Radeon 9800 Pro (Radeon X800 Pro for Vista) or greater

Recommended - NVIDIA GeForce 8800 GTS 640MB or ATI 2900XT 512MB

Sound Hardware DirectX 9.0c compliant card

What is the Name and model number of your motherboard

The nforce 430 is an older chipset model and may not use the full capacity of the Phenom processor ...some boards won't even boot and there are Bios updates available for others ...etc

The onboard graphics (geforce 6150 se) is negated by the 8800 GTX ...good card......the problem isn't your video card

Your also running PC5300 ,,667mhz ram ....if board is capable of PC6400 ...800mhz ....there could be another speedup

The bottlenck seems to be with the board and possibly Ram

(Again MB model and name)

Also make sure you have all the latest drivers for Vcards ...chipsets BIOS etc......