come impostare agp 8 x?

[sonnet]

ragazzi ieri ho montato la geforce 6800 liscia, siccome prima avevo una ati9550 che con l'agp impostato a 8x mi dava problemi li ho risolti impostando l'agp a 4x ccon gli omega driver x ati,
ieri ho formatttato il sistema e adesso guardando
graphic subsystem diagnostic
mi è uscito questo :

$ffffffffff ---------------------------------------------------
$ffffffffff Northbridge information
$ffffffffff ---------------------------------------------------
$0400000000 Description : unknown
$0400000001 Vendor ID : 1106 (VIA)
$0400000002 Device ID : 0269
$0400000003 AGP bus : revision 3.0
$0400000004 AGP status : enabled
$0400000005 AGP rate : 4x supported, 4x selected
$0400000006 AGP SBA : hardwired, enabled
$0400000007 AGP FW : not supported
$ffffffffff ---------------------------------------------------
$ffffffffff Display adapter information
$ffffffffff ---------------------------------------------------
$0000000000 Description : NVIDIA GeForce 6800
$0000000001 Vendor ID : 10de (NVIDIA)
$0000000002 Device ID : 0041
$0000000003 Location : bus 1, device 0, function 0
$0000000004 Bus type : AGP revision 3.0
$0000000005 AGP status : enabled
$0000000006 AGP rate : 4x 8x supported, 4x selected
$0000000007 AGP SBA : hardwired, enabled
$0000000008 AGP FW : supported, disabled
$0000000009 Base address 0 : fd000000 (memory range)
$000000000a Base address 1 : c0000000 (memory range)
$000000000b Base address 2 : fc000000 (memory range)
$000000000c Base address 3 : none
$000000000d Base address 4 : none
$000000000e Base address 5 : none
$ffffffffff ---------------------------------------------------
$ffffffffff NVIDIA specific display adapter information
$ffffffffff ---------------------------------------------------
$0100000000 Graphics core : NV40 revision A1 (16x1,6vp)
$0100000001 Hardwired ID : 0041 (ROM strapped to 0041)
$0100000002 Memory bus : 256-bit
$0100000003 Memory type : DDR (RAM configuration 06)
$0100000004 Memory amount : 131072KB
$0100000005 Core clock : 324.000MHz
$0100000006 Memory clock : 351.000MHz (702.000MHz effective)
$0100000007 Reference clock : 27.000MHz
$010000000b HW masked units : pixel 0001b, vertex 001000b

dove risulta che il northbridge supporta solo agp 4 x
che il display adapter information suppporta 4x e 8 x e che è impostato a 4x,come faccio x reimpostare 8x?
la mia scheda madre è una via k7 880upgrade

[Rusticola]

Verifica che da bios sia impostato o 8x o auto.

[Bozen]

Controlla prima di tutto se hai una MB che supporti l'AGP a 8x, poi vedi quello che ha scritto Rusticola.