i have a sis 660/p4 2.0Ghz/asus p4s8x-mx mobo
before i was using w2k and all my games worked
when i switched to linux, i installed suse linux 10.1 beta 9
and i thought that 3d acceleration was enabled but i shortly found out it was disabled
i tried to enabled it via sax2 but it this showed up

evm@EVM-SuSeLinux:~> sax2
SaX: root Password:
SaX: initializing please wait...
SaX: your current configuration will not be read in

Can't locate FBSet.pm in @INC (@INC contains: /usr/share/sax/modules/detect /usr/share/sax/modules /usr/lib/perl5/5.8.7/i586-linux-thread-multi /usr/lib/perl5/5.8.7 /usr/lib/perl5/site_perl/5.8.7/i586-linux-thread-multi /usr/lib/perl5/site_perl/5.8.7 /usr/lib/perl5/site_perl /usr/lib/perl5/vendor_perl/5.8.7/i586-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.7 /usr/lib/perl5/vendor_perl .) at /usr/share/sax/modules/AutoDetect.pm line 15.
BEGIN failed--compilation aborted at /usr/share/sax/modules/AutoDetect.pm line 15.
Compilation failed in require at /usr/share/sax/init.pl line 18.
BEGIN failed--compilation aborted at /usr/share/sax/init.pl line 18.

evm@EVM-SuSeLinux:~>

this is my xorg.conf file

# /.../
# SaX generated X11 config file
# Created on: 2006-04-15T22:18:38-0400.
#
# Version: 7.1
# Contact: Marcus Schaefer <sax@suse.de>, 2005
# Contact: SaX-User list <https://lists.berlios.de/mailman/listinfo/sax-users>
#
# Automatically generated by [ISaX] (7.1)
# PLEASE DO NOT EDIT THIS FILE!
#
Section "Files"
FontPath "/usr/X11R6/lib/X11/fonts/misc:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/local"
FontPath "/usr/X11R6/lib/X11/fonts/75dpi:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/100dpi:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/Type1"
FontPath "/usr/X11R6/lib/X11/fonts/URW"
FontPath "/usr/X11R6/lib/X11/fonts/Speedo"
FontPath "/usr/X11R6/lib/X11/fonts/PEX"
FontPath "/usr/X11R6/lib/X11/fonts/cyrillic"
FontPath "/usr/X11R6/lib/X11/fonts/latin2/misc:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/latin2/75dpi:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/latin2/100dpi:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/latin2/Type1"
FontPath "/usr/X11R6/lib/X11/fonts/latin7/75dpi:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/baekmuk:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/japanese:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/kwintv"
FontPath "/usr/X11R6/lib/X11/fonts/truetype"
FontPath "/usr/X11R6/lib/X11/fonts/uni:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/CID"
FontPath "/usr/X11R6/lib/X11/fonts/ucs/misc:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/ucs/75dpi:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/ucs/100dpi:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/hellas/misc:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/hellas/75dpi:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/hellas/100dpi:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/hellas/Type1"
FontPath "/usr/X11R6/lib/X11/fonts/misc/sgi:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/xtest"
FontPath "/opt/kde3/share/fonts"
InputDevices "/dev/gpmdata"
InputDevices "/dev/input/mice"
EndSection

Section "ServerFlags"
Option "AllowMouseOpenFail" "on"
EndSection

Section "Module"
Load "dbe"
Load "type1"
Load "freetype"
Load "extmod"
Load "glx"
Load "v4l"
EndSection

Section "InputDevice"
Driver "kbd"
Identifier "Keyboard[0]"
Option "Protocol" "Standard"
Option "XkbLayout" "us"
Option "XkbModel" "pc104"
Option "XkbRules" "xfree86"
EndSection

Section "InputDevice"
Driver "mouse"
Identifier "Mouse[1]"
Option "Buttons" "5"
Option "Device" "/dev/input/mice"
Option "Name" "ImPS/2 Generic Wheel Mouse"
Option "Protocol" "explorerps/2"
Option "Vendor" "Sysp"
Option "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
DisplaySize 345 259
HorizSync 30-71
Identifier "Monitor[0]"
ModelName "SYNCMASTER 753DF(T) 783DF(T) MAGICSYNCMASTER AQ17DF"
Option "DPMS"
VendorName "SAMSUNG"
VertRefresh 50-160
UseModes "Modes[0]"
EndSection

Section "Modes"
Identifier "Modes[0]"
Modeline "1280x1024" 123.19 1280 1368 1504 1728 1024 1025 1028 1064
Modeline "1280x1024" 121.35 1280 1368 1504 1728 1024 1025 1028 1064
Modeline "1280x960" 122.69 1280 1368 1504 1728 960 961 964 1000
Modeline "1280x960" 120.84 1280 1368 1504 1728 960 961 964 999
Modeline "1280x960" 119.11 1280 1368 1504 1728 960 961 964 999
Modeline "1280x800" 123.38 1280 1368 1504 1728 800 801 804 840
Modeline "1280x800" 121.93 1280 1368 1504 1728 800 801 804 840
Modeline "1280x800" 120.33 1280 1368 1504 1728 800 801 804 839
Modeline "1152x864" 110.84 1152 1224 1352 1552 864 865 868 904
Modeline "1152x864" 109.43 1152 1224 1352 1552 864 865 868 904
Modeline "1152x864" 107.91 1152 1224 1352 1552 864 865 868 903
Modeline "1280x768" 122.87 1280 1368 1504 1728 768 769 772 808
Modeline "1280x768" 121.47 1280 1368 1504 1728 768 769 772 808
Modeline "1280x768" 119.93 1280 1368 1504 1728 768 769 772 807
Modeline "1024x768" 97.84 1024 1088 1200 1376 768 769 772 808
Modeline "1024x768" 96.73 1024 1088 1200 1376 768 769 772 808
Modeline "1024x768" 95.50 1024 1088 1200 1376 768 769 772 807
Modeline "1280x600" 122.76 1280 1368 1504 1728 600 601 604 640
Modeline "1280x600" 121.65 1280 1368 1504 1728 600 601 604 640
Modeline "1280x600" 120.36 1280 1368 1504 1728 600 601 604 639
Modeline "1024x600" 97.75 1024 1088 1200 1376 600 601 604 640
Modeline "1024x600" 96.87 1024 1088 1200 1376 600 601 604 640
Modeline "1024x600" 95.84 1024 1088 1200 1376 600 601 604 639
Modeline "800x600" 76.15 800 848 936 1072 600 601 604 640
Modeline "800x600" 75.47 800 848 936 1072 600 601 604 640
Modeline "800x600" 74.67 800 848 936 1072 600 601 604 639
Modeline "768x576" 74.31 768 824 904 1040 576 577 580 616
Modeline "768x576" 73.67 768 824 904 1040 576 577 580 616
Modeline "768x576" 73.03 768 824 904 1040 576 577 580 616
Modeline "640x480" 61.55 640 680 752 864 480 481 484 520
Modeline "640x480" 61.10 640 680 752 864 480 481 484 520
Modeline "640x480" 60.65 640 680 752 864 480 481 484 520
EndSection

Section "Screen"
DefaultDepth 24
SubSection "Display"
Depth 15
Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "1280x600" "1024x600" "800x600" "768x576" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "1280x600" "1024x600" "800x600" "768x576" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "1280x600" "1024x600" "800x600" "768x576" "640x480"
EndSubSection
SubSection "Display"
Depth 32
Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "1280x600" "1024x600" "800x600" "768x576" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "1280x600" "1024x600" "800x600" "768x576" "640x480"
EndSubSection
Device "Device[0]"
Identifier "Screen[0]"
Monitor "Monitor[0]"
EndSection

Section "Device"
BoardName "SiS 660"
BusID "PCI:1@0:0:0"
Driver "sis"
Identifier "Device[0]"
Option "EnableSiSCtrl" "on"
VendorName "SiS"
Option "RenderAccel" "1"
EndSection

Section "ServerLayout"
Identifier "Layout[all]"
InputDevice "Keyboard[0]" "CoreKeyboard"
InputDevice "Mouse[1]" "CorePointer"
Option "Clone" "off"
Option "Xinerama" "off"
Screen "Screen[0]"
EndSection

Section "DRI"
Group "video"
Mode 0660
EndSection

Section "Extensions"
EndSection

3d accelaration support is kind of limited in Linux; you should remember that not too many firms make 3d games for Linux (some do), and there haven't been quite at all 3d-accelarated games around except lately (Linux itself isn't that old yet). In the future this could change, but it takes time. Windows is the leading 3d-accelarated-games-running OS, and stays that way for a while it seems..as long as the 3d-card manufacturers don't start writing good, easy-to-install drivers that are updated as necessary (these days I know only ATI and nVidia make somewhat good drivers).

I'd suggest you try out the MESA project. Use the Google, Luke.

EDIT: I don't know if any distribution gives you hardware 3d-accelaration by default; and if some do, then you probably need to have a very well known ATI or nVidia gfx card. I'd let these Playstations, Xboxes and Nintendoes do the gaming stuff and leave computers do the other things..after all, computers create a whole lot of trouble when it comes to games, and are slow and sluggish because they need to run many other things too besides the games.