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System Information
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Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.120830-0333)
Language: English (Regional Setting: English)
System Manufacturer: Hewlett-Packard
System Model: HP Pavilion dv7 Notebook PC
BIOS: Default System BIOS
Processor: AMD Phenom(tm) II N850 Triple-Core Processor (3 CPUs), ~2.2GHz
Memory: 4096MB RAM
Available OS Memory: 3834MB RAM
Page File: 2015MB used, 5652MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode
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DxDiag Notes
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Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Sound Tab 2: No problems found.
Input Tab: No problems found.
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DirectX Debug Levels
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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)
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Display Devices
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Card name: ATI Mobility Radeon HD 5470
Manufacturer: ATI Technologies Inc.
Chip type: ATI display adapter (0x68E0)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_68E0&SUBSYS_1443103C&REV_00
Display Memory: 2165 MB
Dedicated Memory: 503 MB
Shared Memory: 1661 MB
Current Mode: 1600 x 900 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: unknown
Monitor Id: SEC3051
Native Mode: 1600 x 900(p) (59.998Hz)
Output Type: Internal
Driver Name: atiu9p64.dll,atiuxp64.dll,atiuxp64.dll,atiu9pag,atiuxpag,atiuxpag,atiumdva,atiumd6a.cap,atitmm64.dll
Driver File Version: 8.14.0001.6143 (English)
Driver Version: 8.770.2.1000
DDI Version: 11
Driver Model: WDDM 1.1
Driver Attributes: Final Retail
Driver Date/Size: 9/20/2010 00:20:12, 37376 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71EE2-2BA0-11CF-7364-4234A1C2C535}
Vendor ID: 0x1002
Device ID: 0x68E0
SubSys ID: 0x1443103C
Revision ID: 0x0000
Driver Strong Name: oem51.inf:ATI.Mfg.NTamd64.6.1:ati2mtag_Manhattan_PXAA:8.770.2.1000😛ci\ven_1002&dev_68e0&subsys_1443103c
Rank Of Driver: 00E60001
D3D9 Overlay: Not Supported
DXVA-HD: Not Supported
DDraw Status: Enabled
D3D Status: Enabled
AGP Status: Enabled
Check if there are new graphic drivers for your computer. yours are about 3 years old.
I'm rather bad at hard ware diagnosis and I know almost nothing about AMD processors but it seems to me, that CPU is not really made for gaming. My suggetion to you is to post your DxDiag in the technical part of the official forum where there are people that know about this kind of stuff and maybe can give you a better opinion on your computer.
Other than that, try the suggestions here: http://answers.ea.com/t5/The-Sims-3/FAQ-Lags-amp-Freezes/td-p/646
