Comment faire reconnaître cpu par carte-mère?

Bonjour
suite au décès de ma carte-mère, j'ai installé mon cpu Intel P3 ghz sur une plus vieille carte-mère ayant supporté un P3 866; tout se passe bien, tout fonctionne, mais au démarrage, c'est toujours le 866 qui est affiché.
Comment dois-je faire pour que la Mb reconnaisse le cpu?
merci pour votre attention; je joins la liste du matériel : sudo lshw
ubuntu
description: Desktop Computer
product: 0000000
vendor: ALi String
version: 0000000
serial: 00000000
width: 32 bits
capabilities: smbios-2.3 dmi-2.3
configuration: chassis=desktop
*-core
description: Motherboard
product: ALi 1631
vendor: Acer Laboratories Inc.
physical id: 0
version: 1.0
serial: 00000000
*-firmware
description: BIOS
vendor: American Megatrends Inc.
physical id: 0
version: 62710 (07/15/97 )
size: 64KB
capacity: 192KB
capabilities: pci pnp apm upgrade shadowing escd cdboot bootselect socketedrom edd int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer int10video acpi usb agp ls120boot zipboot biosbootspecification
*-cpu
description: CPU
product: Pentium III (Coppermine)
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
version: 6.8.6
size: 866MHz
width: 32 bits
clock: 133MHz
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr sse
*-cache:0
description: L1 cache
physical id: 5
slot: L1 Cache
size: 32KB
capacity: 1MB
capabilities: synchronous internal write-back unified
*-cache:1
description: L2 cache
physical id: 6
slot: L2 Cache
size: 256KB
capacity: 2MB
capabilities: synchronous internal write-back unified
*-memory
description: System memory
physical id: 1
size: 496MB
*-pci
description: Host bridge
product: M1621
vendor: ALi Corporation
physical id: d8000000
bus info: pci@00:00.0
version: 04
width: 32 bits
clock: 33MHz
resources: iomemory:d8000000-dbffffff
*-pci
description: PCI bridge
product: PCI to AGP Controller
vendor: ALi Corporation
physical id: 1
bus info: pci@00:01.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master
*-display
description: VGA compatible controller
product: NV5 [Aladdin TNT2]
vendor: nVidia Corporation
physical id: 0
bus info: pci@01:00.0
version: 20
size: 32MB
width: 32 bits
clock: 66MHz
capabilities: vga bus_master cap_list
configuration: driver=nvidia
resources: iomemory:de000000-deffffff iomemory:d2000000-d3ffffff irq:11
*-usb:0
description: USB Controller
product: USB 1.1 Controller
vendor: ALi Corporation
physical id: 2
bus info: pci@00:02.0
version: 03
width: 32 bits
clock: 33MHz
capabilities: ohci bus_master cap_list
configuration: driver=ohci_hcd
resources: iomemory:dffdf000-dffdffff irq:10
*-usbhost
product: OHCI Host Controller
vendor: Linux 2.6.15-23-386 ohci_hcd
physical id: 1
bus info: usb@1
logical name: usb1
version: 2.06
capabilities: usb-1.10
configuration: driver=hub maxpower=0mA slots=2 speed=12.0MB/s
*-isa UNCLAIMED
description: ISA bridge
product: M1533 PCI to ISA Bridge [Aladdin IV]
vendor: ALi Corporation
physical id: 7
bus info: pci@00:07.0
version: c3
width: 32 bits
clock: 33MHz
capabilities: isa bus_master
*-multimedia
description: Multimedia audio controller
product: CM8738
vendor: C-Media Electronics Inc
physical id: c
bus info: pci@00:0c.0
version: 10
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: driver=C-Media PCI
resources: ioport:d800-d8ff irq:5
*-communication UNCLAIMED
description: Communication controller
product: CM8738
vendor: C-Media Electronics Inc
physical id: c.1
bus info: pci@00:0c.1
version: 10
width: 32 bits
clock: 33MHz
capabilities: cap_list
resources: ioport:dc00-dc3f irq:9
*-network
description: Ethernet interface
product: SiS900 PCI Fast Ethernet
vendor: Silicon Integrated Systems [SiS]
physical id: e
bus info: pci@00:0e.0
logical name: eth1
version: 02
serial: 00:d0:09:85:08:a1
size: 100MB/s
capacity: 100MB/s
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegociation
configuration: autonegociation=on broadcast=yes driver=sis900 driverversion=v1.08.09 Sep. 19 2005 duplex=full ip=172.19.3.6 link=yes multicast=yes port=MII speed=100MB/s
resources: ioport:d400-d4ff iomemory:dffff000-dfffffff irq:3
*-ide
description: IDE interface
product: M5229 IDE
vendor: ALi Corporation
physical id: f
bus info: pci@00:0f.0
version: c2
width: 32 bits
clock: 33MHz
capabilities: ide bus_master cap_list
configuration: driver=ALI15x3_IDE
resources: ioport:ffa0-ffaf irq:14
*-ide:0
description: IDE Channel 0
physical id: 0
bus info: ide@0
logical name: ide0
clock: 33MHz
*-disk
description: ATA Disk
product: ST340810A
vendor: Seagate
physical id: 0
bus info: ide@0.0
logical name: /dev/hda
version: 3.39
serial: 5FB9LBK1
size: 37GB
capacity: 37GB
capabilities: ata dma lba iordy smart security pm apm partitioned partitioned:dos
configuration: apm=off mode=udma4 smart=on
*-volume:0
description: Linux filesystem partition
physical id: 1
bus info: ide@0.0,1
logical name: /dev/hda1
capacity: 35GB
capabilities: primary bootable
*-volume:1
description: Extended partition
physical id: 2
bus info: ide@0.0,2
logical name: /dev/hda2
capacity: 1466MB
capabilities: extended partitioned partitioned:extended
*-ide:1
description: IDE Channel 1
physical id: 1
bus info: ide@1
logical name: ide1
clock: 33MHz
*-cdrom
description: IDE CD-ROM
product: LG CD-ROM CRD-8484B
physical id: 0
bus info: ide@1.0
logical name: /dev/hdc
version: 1.06
capabilities: packet atapi cdrom removable nonmagnetic dma lba iordy audio
configuration: mode=udma2
*-disc
physical id: 0
logical name: /dev/hdc
*-usb:1
description: USB Controller
product: USB
vendor: NEC Corporation
physical id: 12.1
bus info: pci@00:12.1
version: 41
width: 32 bits
clock: 33MHz
capabilities: ohci bus_master cap_list
configuration: driver=ohci_hcd
resources: iomemory:dfffd000-dfffdfff irq:5
*-usbhost
product: OHCI Host Controller
vendor: Linux 2.6.15-23-386 ohci_hcd
physical id: 1
bus info: usb@3
logical name: usb3
version: 2.06
capabilities: usb-1.10
configuration: driver=hub maxpower=0mA slots=2 speed=12.0MB/s
*-usb:2
description: USB Controller
product: USB
vendor: NEC Corporation
physical id: 12
bus info: pci@00:12.0
version: 41
width: 32 bits
clock: 33MHz
capabilities: ohci bus_master cap_list
configuration: driver=ohci_hcd
resources: iomemory:dfffc000-dfffcfff irq:11
*-usbhost
product: OHCI Host Controller
vendor: Linux 2.6.15-23-386 ohci_hcd
physical id: 1
bus info: usb@2
logical name: usb2
version: 2.06
capabilities: usb-1.10
configuration: driver=hub maxpower=0mA slots=3 speed=12.0MB/s
*-usb:3
description: USB Controller
product: USB 2.0
vendor: NEC Corporation
physical id: 12.2
bus info: pci@00:12.2
version: 02
width: 32 bits
clock: 33MHz
capabilities: ehci bus_master cap_list
configuration: driver=ehci_hcd
resources: iomemory:dfffef00-dfffefff irq:9
*-usbhost
product: EHCI Host Controller
vendor: Linux 2.6.15-23-386 ehci_hcd
physical id: 1
bus info: usb@4
logical name: usb4
version: 2.06
capabilities: usb-2.00
configuration: driver=hub maxpower=0mA slots=5 speed=480.0MB/s