Xorg/Modes issue

[Jake Stride]

I have tried googling around to find the answer to my query but seem 
unable to find the answers. I have followed the handbook guide on 
setting up X and can get everything working OK except for the screen 
resolution.

I have a dell optiplex with an intel 810 card and a iiyama e481s monitor 
that can do 1280x1024 however everything always comes up on the screen 
at 640x480 no matter what I seem to put in the xorg.conf file.

Can anyone point me in the right direction please. I have attached a 
copy of the config file I am using too and am currently runng the 5.3 
stable release.

Thanks

Jake

Section "ServerLayout"
	Identifier     "X.org Configured"
	Screen      0  "Screen0" 0 0
	InputDevice    "Mouse0" "CorePointer"
	InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
	RgbPath      "/usr/X11R6/lib/X11/rgb"
	ModulePath   "/usr/X11R6/lib/modules"
	FontPath     "/usr/X11R6/lib/X11/fonts/misc/"
	FontPath     "/usr/X11R6/lib/X11/fonts/TTF/"
	FontPath     "/usr/X11R6/lib/X11/fonts/Speedo/"
	FontPath     "/usr/X11R6/lib/X11/fonts/Type1/"
	FontPath     "/usr/X11R6/lib/X11/fonts/CID/"
	FontPath     "/usr/X11R6/lib/X11/fonts/75dpi/"
	FontPath     "/usr/X11R6/lib/X11/fonts/100dpi/"
EndSection

Section "Module"
	Load  "dbe"
	Load  "dri"
	Load  "extmod"
	Load  "glx"
	Load  "record"
	Load  "xtrap"
	Load  "freetype"
	Load  "speedo"
	Load  "type1"
EndSection

Section "InputDevice"
	Identifier  "Keyboard0"
	Driver      "keyboard"
EndSection

Section "InputDevice"
	Identifier  "Mouse0"
	Driver      "mouse"
	Option	    "Protocol" "auto"
	Option	    "Device" "/dev/sysmouse"
EndSection

Section "Monitor"
	#DisplaySize	  380   300	# mm
	Identifier   "Monitor0"
	VendorName   "IVM"
	ModelName    "PLE481"
  ### Uncomment if you don't want to default to DDC:
#	HorizSync    842216256.0 - 52.0
#	HorizSync    24.0 - 83.0
#	VertRefresh  858928448.0 - 0.0
	HorizSync    79.9
	VertRefresh  75
	Option	    "DPMS"
EndSection

Section "Device"
         ### Available Driver options are:-
         ### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
         ### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
         ### [arg]: arg optional
         #Option     "NoAccel"            	# [<bool>]
         #Option     "SWcursor"           	# [<bool>]
         #Option     "ColorKey"           	# <i>
         #Option     "CacheLines"         	# <i>
         #Option     "Dac6Bit"            	# [<bool>]
         #Option     "DRI"                	# [<bool>]
         #Option     "NoDDC"              	# [<bool>]
         #Option     "ShowCache"          	# [<bool>]
         #Option     "XvMCSurfaces"       	# <i>
         #Option     "PageFlip"           	# [<bool>]
	Identifier  "Card0"
	Driver      "i810"
	VendorName  "Intel Corp."
	BoardName   "82865G Integrated Graphics Device"
	BusID       "PCI:0:2:0"
EndSection

Section "Screen"
	Identifier "Screen0"
	Device     "Card0"
	Monitor    "Monitor0"
	SubSection "Display"
		Viewport   0 0
		Depth     24
		Modes     "1280x1024"
	EndSubSection
EndSection