Computer HALP

Right, so my computer has been running The Sims 3 since it came out. Obviously it has become slower with each SP and EP. I'm torn as to whether I should buy a new computer or upgrade my current one. I have absolutely no idea about computer specs, which is why I'm here, both hoping and believing there is at least someone with a whole lot more knowledge on the subject than myself. I know the graphics are pretty good on both Sims 3 and WoW, which are basically the only two games I play using this computer, but I also believe I could use more RAM. That's as far as my knowledge goes though and I would rather ask somebody who knows before making a large purchase of a new computer, or perhaps upgrade my current one instead. So, I'm leaving my specs here (did a dxdiag) in hopes that somebody can help me out.

------------------
System Information
------------------
Time of this report: 3/11/2013, 23:53:31
Machine name: DOMINO1
Operating System: Windows Vista™ Ultimate (6.0, Build 6002) Service Pack 2 (6002.vistasp2_gdr.130104-1437)
Language: English (Regional Setting: English)
System Manufacturer: Sony Corporation
System Model: VGN-FW380TY
BIOS: BIOS Date: 06/04/08 14:30:19 Ver: 08.00.10
Processor: Intel(R) Core(TM)2 Duo CPU P8600 @ 2.40GHz (2 CPUs), ~2.4GHz
Memory: 4062MB RAM
Page File: 6573MB used, 1750MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
DxDiag Version: 7.00.6002.18107 32bit Unicode
DxDiag Previously: Crashed in system information (stage 4) & DirectInput (stage 1) & DirectShow (stage 1)

------------
DxDiag Notes
------------
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Input Tab:

--------------------
DirectX Debug Levels
--------------------
Direct3D: 0/4 (retail)
DirectDraw: 0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay: 0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow: 0/6 (retail)

---------------
Display Devices
---------------
Card name: ATI Mobility Radeon HD 3650
Manufacturer: ATI Technologies Inc.
Chip type: ATI Radeon Graphics Processor (0x9591)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_9591&SUBSYS_9035104D&REV_00
Display Memory: 2282 MB
Dedicated Memory: 507 MB
Shared Memory: 1775 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)
Monitor: Monitor PnP genérico
Driver Name: atidxx32,atidxx64.dll,atiumdag,atiumdva,atiumd64.dll,atiumd6a.cap,atitmm64.dll
Driver Version: 7.15.0010.0176 (English)
DDI Version: 10.1
BGRA Supported: No
Driver Attributes: Final Retail
Driver Date/Size: 5/14/2009 21:13:14, 2391552 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71EE2-D6D1-11CF-7E71-3FB0A1C2CA35}
Vendor ID: 0x1002
Device ID: 0x9591
SubSys ID: 0x9035104D
Revision ID: 0x0000
Revision ID: 0x0000
Video Accel: ModeMPEG2_A ModeMPEG2_C
Deinterlace Caps: {6E8329FF-B642-418B-BCF0-BCB6591E255F}: Format(In/Out)=(YUY2,YUY2) Frames(Prev/Fwd/Back)=(0,0,1) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive
{335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(YUY2,YUY2) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch
{5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(YUY2,YUY2) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY
{6E8329FF-B642-418B-BCF0-BCB6591E255F}: Format(In/Out)=(UYVY,UYVY) Frames(Prev/Fwd/Back)=(0,0,1) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive
{335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(UYVY,UYVY) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch
{5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(UYVY,UYVY) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY
{3C5323C1-6FB7-44F5-9081-056BF2EE449D}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,2) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive
{552C0DAD-CCBC-420B-83C8-74943CF9F1A6}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,2) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive
{6E8329FF-B642-418B-BCF0-BCB6591E255F}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,1) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive
{335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch
{5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY
DDraw Status: Enabled
D3D Status: Enabled
AGP Status: Enabled

-------------
Sound Devices
-------------
Description: Speaker/HP (Realtek High Definition Audio)
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: HDAUDIO\FUNC_01&VEN_10EC&DEV_0262&SUBSYS_104D2E00&REV_1003
Manufacturer ID: 1
Product ID: 100
Type: WDM
Driver Name: RTKVHD64.sys
Driver Version: 6.00.0001.5653 (English)
Driver Attributes: Final Retail
WHQL Logo'd: Yes
Date and Size: 10/17/2008 04:34:32, 1474840 bytes
Other Files:
Driver Provider: Realtek Semiconductor Corp.
HW Accel Level: Basic
Cap Flags: 0xF1F
Min/Max Sample Rate: 100, 200000
Static/Strm HW Mix Bufs: 1, 0
Static/Strm HW 3D Bufs: 0, 0
HW Memory: 0
Voice Management: No
EAX(tm) 2.0 Listen/Src: No, No
I3DL2(tm) Listen/Src: No, No
Sensaura(tm) ZoomFX(tm): No

---------------------
Sound Capture Devices
---------------------
Description: Micrófono (Realtek High Definition Audio)
Default Sound Capture: Yes
Default Voice Capture: Yes
Driver Name: RTKVHD64.sys
Driver Version: 6.00.0001.5653 (English)
Driver Attributes: Final Retail
Date and Size: 10/17/2008 04:34:32, 1474840 bytes
Cap Flags: 0x1
Format Flags: 0xFFFFF

-------------------
DirectInput Devices
-------------------
Poll w/ Interrupt: No

-----------
USB Devices
-----------

----------------
Gameport Devices
----------------

------------
PS/2 Devices
------------

--------------
System Devices
--------------
Name: Intel(R) WiFi Link 5100 AGN
Device ID: PCI\VEN_8086&DEV_4232&SUBSYS_13018086&REV_00\4&2510B6D4&0&00E3
Driver: n/a

Name: Mobile Intel(R) 45 Express Chipset Series PCI Express Root Port - 2A41
Device ID: PCI\VEN_8086&DEV_2A41&SUBSYS_9035104D&REV_07\3&11583659&0&08
Driver: n/a

Name: Mobile Intel(R) 45 Express Chipset Series Processor to DRAM Controller - 2A40
Device ID: PCI\VEN_8086&DEV_2A40&SUBSYS_9035104D&REV_07\3&11583659&0&00
Driver: n/a

Name: Intel(R) ICH9 Family PCI Express Root Port 5 - 2948
Device ID: PCI\VEN_8086&DEV_2948&SUBSYS_9035104D&REV_03\3&11583659&0&E4
Driver: n/a

Name: Intel(R) ICH9 Family PCI Express Root Port 4 - 2946
Device ID: PCI\VEN_8086&DEV_2946&SUBSYS_9035104D&REV_03\3&11583659&0&E3
Driver: n/a

Name: Intel(R) ICH9 Family PCI Express Root Port 2 - 2942
Device ID: PCI\VEN_8086&DEV_2942&SUBSYS_9035104D&REV_03\3&11583659&0&E1
Driver: n/a

Name: Intel(R) ICH9 Family PCI Express Root Port 1 - 2940
Device ID: PCI\VEN_8086&DEV_2940&SUBSYS_9035104D&REV_03\3&11583659&0&E0
Driver: n/a

Name: Controladora de High Definition Audio
Device ID: PCI\VEN_8086&DEV_293E&SUBSYS_9035104D&REV_03\3&11583659&0&D8
Driver: n/a

Name: Intel(R) ICH9 Family USB2 Enhanced Host Controller - 293C
Device ID: PCI\VEN_8086&DEV_293C&SUBSYS_9035104D&REV_03\3&11583659&0&D7
Driver: n/a

Name: Intel(R) ICH9 Family USB2 Enhanced Host Controller - 293A
Device ID: PCI\VEN_8086&DEV_293A&SUBSYS_9035104D&REV_03\3&11583659&0&EF
Driver: n/a

Name: Intel(R) ICH9 Family USB Universal Host Controller - 2939
Device ID: PCI\VEN_8086&DEV_2939&SUBSYS_9035104D&REV_03\3&11583659&0&D2
Driver: n/a

Name: Intel(R) ICH9 Family USB Universal Host Controller - 2938
Device ID: PCI\VEN_8086&DEV_2938&SUBSYS_9035104D&REV_03\3&11583659&0&D1
Driver: n/a

Name: Intel(R) ICH9 Family USB Universal Host Controller - 2937
Device ID: PCI\VEN_8086&DEV_2937&SUBSYS_9035104D&REV_03\3&11583659&0&D0
Driver: n/a

Name: Intel(R) ICH9 Family USB Universal Host Controller - 2936
Device ID: PCI\VEN_8086&DEV_2936&SUBSYS_9035104D&REV_03\3&11583659&0&EA
Driver: n/a

Name: Intel(R) ICH9 Family USB Universal Host Controller - 2935
Device ID: PCI\VEN_8086&DEV_2935&SUBSYS_9035104D&REV_03\3&11583659&0&E9
Driver: n/a

Name: Intel(R) ICH9 Family USB Universal Host Controller - 2934
Device ID: PCI\VEN_8086&DEV_2934&SUBSYS_9035104D&REV_03\3&11583659&0&E8
Driver: n/a

Name: Intel(R) ICH9 Family SMBus Controller - 2930
Device ID: PCI\VEN_8086&DEV_2930&SUBSYS_9035104D&REV_03\3&11583659&0&FB
Driver: n/a

Name: Intel(R) ICH9M-E/M SATA AHCI Controller
Device ID: PCI\VEN_8086&DEV_2929&SUBSYS_9035104D&REV_03\3&11583659&0&FA
Driver: n/a

Name: Intel(R) ICH9M LPC Interface Controller - 2919
Device ID: PCI\VEN_8086&DEV_2919&SUBSYS_9035104D&REV_03\3&11583659&0&F8
Driver: n/a

Name: Puente PCI Intel(R) 82801 - 2448
Device ID: PCI\VEN_8086&DEV_2448&SUBSYS_9035104D&REV_93\3&11583659&0&F0
Driver: n/a

Name: Marvell Yukon 88E8055 PCI-E Gigabit Ethernet Controller
Device ID: PCI\VEN_11AB&DEV_4363&SUBSYS_9035104D&REV_14\4&18878AB7&0&00E4
Driver: n/a

Name: Controladora de host RICOH OHCI compatible con IEEE 1394
Device ID: PCI\VEN_1180&DEV_0832&SUBSYS_9035104D&REV_05\4&2115C92E&0&18F0
Driver: n/a

Name: Ricoh SD Host Controller
Device ID: PCI\VEN_1180&DEV_0822&SUBSYS_9035104D&REV_22\4&2115C92E&0&19F0
Driver: n/a

Name: Ricoh Memory Stick Host Controller
Device ID: PCI\VEN_1180&DEV_0592&SUBSYS_9035104D&REV_12\4&2115C92E&0&1AF0
Driver: n/a

Name: Controladora de High Definition Audio
Device ID: PCI\VEN_1002&DEV_AA20&SUBSYS_9035104D&REV_00\4&3026B437&1&0108
Driver: n/a

Name: ATI Mobility Radeon HD 3650
Device ID: PCI\VEN_1002&DEV_9591&SUBSYS_9035104D&REV_00\4&3026B437&1&0008
Driver: n/a