The first match always run smoothly with no problem at all (approx. 40-50FPS with all setting to max). But in the second match or later there are randomly freeze then continue after a few seconds also the framerate is still stable afterward. Don't really sure it's just random or it always in the 2nd+ match. Note that this is trying against all AI opponents. I hope this help out a bit.
DXDiag is as following
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System Information
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Time of this report: 2/18/2009, 05:58:04
Machine name: GOKPC
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.080814-1236)
Language: English (Regional Setting: English)
System Manufacturer: Gigabyte Technology Co., Ltd.
System Model: GA-MA790X-UD4
BIOS: Award Modular BIOS v6.00PG
Processor: AMD Phenom(tm) II X4 920 Processor, MMX, 3DNow (4 CPUs), ~2.8GHz
Memory: 3326MB RAM
Page File: 700MB used, 4509MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.5512 32bit Unicode
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DxDiag Notes
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DirectX Files Tab: No problems found.
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Music Tab: No problems found.
Input Tab: No problems found.
Network Tab: No problems found.
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DirectX Debug Levels
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Direct3D: 0/4 (n/a)
DirectDraw: 0/4 (retail)
DirectInput: 0/5 (n/a)
DirectMusic: 0/5 (n/a)
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 Radeon HD 4800 Series
Manufacturer: ATI Technologies Inc.
Chip type: ATI Radeon Graphics Processor (0x9440)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_9440&SUBSYS_0851174B&REV_00
Display Memory: 1024.0 MB
Current Mode: 1920 x 1200 (32 bit) (60Hz)
Monitor: Plug and Play Monitor
Monitor Max Res: 1600,1200
Driver Name: ati2dvag.dll
Driver Version: 6.14.0010.6903 (English)
DDI Version: 9 (or higher)
Driver Attributes: Final Retail
Driver Date/Size: 1/14/2009 14:47:44, 323584 bytes
WHQL Logo'd: Yes