When yoiu do the DxDiag thing, run the video and sound tests, then save the info into a plain .txt file. Then post the top third of that text, we really need to see it all.
A video card will not increase your system ram, two different things.
I do run AH with 512Mb of system ram but I do not run skins and have not increased my texture size.
This is what we need from DxDiag:
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System Information
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Time of this report: 11/15/2006, 22:15:16
Machine name: ATHLONXP
Operating System: Windows XP Home Edition (5.1, Build 2600) Service Pack 2 (2600.xpsp_sp2_gdr.050301-1519)
Language: English (Regional Setting: English)
System Manufacturer: ASUSTeK Computer INC.
System Model: A7N8X
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: AMD Athlon(tm) XP 2500+, MMX, 3DNow, ~1.8GHz
Memory: 512MB RAM
Page File: 215MB used, 1035MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.2180 32bit Unicode
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DxDiag Notes
------------
DirectX Files Tab: No problems found.
Display Tab 1: No problems found. DirectDraw test results: All tests were successful. Direct3D 7 test results: All tests were successful. Direct3D 8 test results: All tests were successful. Direct3D 9 test results: All tests were successful.
Sound Tab 1: DirectSound test results: All tests were successful.
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: RADEON 9800 PRO
Manufacturer: ATI Technologies Inc.
Chip type: RADEON 9800 AGP (0x4E48)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_4E48&SUBSYS_00021002&REV_00
Display Memory: 128.0 MB
Current Mode: 1280 x 1024 (32 bit) (85Hz)
Monitor: ViewSonic A90-2
Monitor Max Res: 1600,1200
Driver Name: ati2dvag.dll
Driver Version: 6.14.0010.6497 (English)
DDI Version: 9 (or higher)
Driver Attributes: Final Retail
Driver Date/Size: 11/30/2004 22:12:50, 221184 bytes
WHQL Logo'd: Yes
WHQL Date Stamp: n/a
VDD: n/a
Mini VDD: ati2mtag.sys
Mini VDD Date: 11/30/2004 22:12:28, 873984 bytes
Device Identifier: {D7B71EE2-0D08-11CF-D36A-0820A1C2CB35}
Vendor ID: 0x1002
Device ID: 0x4E48
SubSys ID: 0x00021002
Revision ID: 0x0000
Revision ID: 0x0000
Video Accel: ModeMPEG2_C ModeMPEG2_D
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_BOBVerticalSt retch
{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_BOBVerticalSt retch
Registry: OK
DDraw Status: Enabled
D3D Status: Enabled
AGP Status: Enabled
DDraw Test Result: All tests were successful.
D3D7 Test Result: All tests were successful.
D3D8 Test Result: All tests were successful.
D3D9 Test Result: All tests were successful.
-------------
Sound Devices
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Description: NVIDIA(R) nForce(TM) Audio
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: NFORCE_VAD
Manufacturer ID: 1
Product ID: 100
Type: WDM
Driver Name: nvapu.sys
Driver Version: 6.14.0462.0000 (English)
Driver Attributes: Final Retail
WHQL Logo'd: Yes
Date and Size: 4/13/2005 11:34:02, 414464 bytes
Other Files:
Driver Provider: NVIDIA Corporation
HW Accel Level: Standard
Cap Flags: 0xF5F
Min/Max Sample Rate: 200, 100000
Static/Strm HW Mix Bufs: 20, 18
Static/Strm HW 3D Bufs: 16, 16
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
Registry: OK
Sound Test Result: All tests were successful.