Tem como melhorar a placa de video?

Olá pessoal. Quando eu rolo a pagina dos sites, a rolagem é meio devagar. Li no google que isso é devido a placa de video.

Minha pergunta é a seguinte:

Tem como fazer algo para melhorar a placa de video? Tipo trocar de drive, configurar alguma coisa para dar uma melhorada,ou só colocando uma placa de video off bord?

Tambem ouvi alguem dizer que; as vezes a placa fica compratilhada desnecessariamente, ai ela perde o seu rendimento. Isso procede?

lspci
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 651 Host (rev 02)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] AGP Port (virtual PCI-to-PCI bridge)
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS962 [MuTIOL Media IO] (rev 25)
00:02.1 SMBus: Silicon Integrated Systems [SiS] SiS961/2/3 SMBus controller
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE]
00:02.6 Modem: Silicon Integrated Systems [SiS] AC'97 Modem Controller (rev a0)
00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] SiS7012 AC'97 Sound Controller (rev a0)
00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller
00:04.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900 PCI Fast Ethernet (rev 91)
01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter

Posta a configuração de hardware do seu PC (placa-mãe, processador, memória e placas de vídeo e demais offboard).

H/W path Device Class Description
========================================================
system Desktop Computer
/0 bus SiS-651C
/0/0 memory 128KiB BIOS
/0/4 processor Intel(R) Celeron(R) CPU 2.40GHz
/0/4/8 memory 32KiB L1 cache
/0/4/9 memory 256KiB L2 cache
/0/18 memory 2GiB System Memory
/0/18/0 memory 1GiB DIMM SDRAM Synchronous
/0/18/1 memory 1GiB DIMM SDRAM Synchronous
/0/100 bridge 651 Host
/0/100/1 bridge AGP Port (virtual PCI-to-PCI bridge
/0/100/1/0 display 661/741/760 PCI/AGP or 662/761Gx PC
/0/100/2 bridge SiS962 [MuTIOL Media IO]
/0/100/2.1 bus SiS961/2/3 SMBus controller
/0/100/2.5 scsi0 storage 5513 [IDE]
/0/100/2.5/0 /dev/sda disk 41GB Maxtor 6E040L0
/0/100/2.5/0/1 /dev/sda1 volume 36GiB EXT4 volume
/0/100/2.5/0/2 /dev/sda2 volume 1651MiB Extended partition
/0/100/2.5/0/2/5 /dev/sda5 volume 1651MiB Linux swap / Solaris partit
/0/100/2.5/1 /dev/cdrom disk DVD-RAM GH22NP20
/0/100/2.6 communication AC'97 Modem Controller
/0/100/2.7 multimedia SiS7012 AC'97 Sound Controller
/0/100/3 bus USB 1.1 Controller
/0/100/3.1 bus USB 1.1 Controller
/0/100/3.3 bus USB 2.0 Controller
/0/100/4 eth0 network SiS900 PCI Fast Ethernet

description: Computer
width: 32 bits
*-core
description: Motherboard
physical id: 0
*-memory
description: System memory
physical id: 0
size: 1950MiB
*-cpu
product: Intel(R) Celeron(R) CPU 2.40GHz
vendor: Intel Corp.
physical id: 1
bus info: cpu@0
version: 15.3.4
serial: 0000-0F34-0000-0000-0000-0000
size: 2400MHz
width: 32 bits
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc up pebs bts pni dtes64 monitor ds_cpl cid xtpr
configuration: id=0
*-pci
description: Host bridge
product: 651 Host
vendor: Silicon Integrated Systems [SiS]
physical id: 100
bus info: pci@0000:00:00.0
version: 02
width: 32 bits
clock: 33MHz
configuration: driver=agpgart-sis latency=32
resources: irq:0 memory:c0000000-dfffffff
*-pci
description: PCI bridge
product: AGP Port (virtual PCI-to-PCI bridge)
vendor: Silicon Integrated Systems [SiS]
physical id: 1
bus info: pci@0000:00:01.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: pci normal_decode bus_master
resources: ioport:d000(size=4096) memory:e8000000-e80fffff memory:e0000000-e7ffffff
*-display UNCLAIMED
description: VGA compatible controller
product: 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter
vendor: Silicon Integrated Systems [SiS]
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: vga_controller cap_list
configuration: latency=0
resources: memory:e0000000-e7ffffff memory:e8000000-e801ffff ioport:d000(size=128)
*-isa
description: ISA bridge
product: SiS962 [MuTIOL Media IO]
vendor: Silicon Integrated Systems [SiS]
physical id: 2
bus info: pci@0000:00:02.0
version: 25
width: 32 bits
clock: 33MHz
capabilities: isa bus_master
configuration: latency=0
*-serial
description: SMBus
product: SiS961/2/3 SMBus controller
vendor: Silicon Integrated Systems [SiS]
physical id: 2.1
bus info: pci@0000:00:02.1
version: 00
width: 32 bits
clock: 33MHz
configuration: driver=sis96x_smbus latency=0
resources: irq:0 ioport:10c0(size=32)
*-ide
description: IDE interface
product: 5513 [IDE]
vendor: Silicon Integrated Systems [SiS]
physical id: 2.5
bus info: pci@0000:00:02.5
version: 00
width: 32 bits
clock: 33MHz
capabilities: ide bus_master cap_list
configuration: driver=pata_sis latency=128
resources: irq:16 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:4000(size=16)
*-communication UNCLAIMED
description: Modem
product: AC'97 Modem Controller
vendor: Silicon Integrated Systems [SiS]
physical id: 2.6
bus info: pci@0000:00:02.6
version: a0
width: 32 bits
clock: 33MHz
capabilities: generic cap_list
configuration: latency=32 maxlatency=11 mingnt=52
resources: ioport:e000(size=256) ioport:e100(size=128)
*-multimedia
description: Multimedia audio controller
product: SiS7012 AC'97 Sound Controller
vendor: Silicon Integrated Systems [SiS]
physical id: 2.7
bus info: pci@0000:00:02.7
version: a0
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: driver=Intel ICH latency=32 maxlatency=11 mingnt=52
resources: irq:18 ioport:e200(size=256) ioport:e300(size=128)
*-usb:0
description: USB Controller
product: USB 1.1 Controller
vendor: Silicon Integrated Systems [SiS]
physical id: 3
bus info: pci@0000:00:03.0
version: 0f
width: 32 bits
clock: 33MHz
capabilities: ohci bus_master
configuration: driver=ohci_hcd latency=32 maxlatency=80
resources: irq:20 memory:e8123000-e8123fff
*-usb:1
description: USB Controller
product: USB 1.1 Controller
vendor: Silicon Integrated Systems [SiS]
physical id: 3.1
bus info: pci@0000:00:03.1
version: 0f
width: 32 bits
clock: 33MHz
capabilities: ohci bus_master
configuration: driver=ohci_hcd latency=32 maxlatency=80
resources: irq:21 memory:e8120000-e8120fff
*-usb:2
description: USB Controller
product: USB 2.0 Controller
vendor: Silicon Integrated Systems [SiS]
physical id: 3.3
bus info: pci@0000:00:03.3
version: 00
width: 32 bits
clock: 33MHz
capabilities: ehci bus_master cap_list
configuration: driver=ehci_hcd latency=32 maxlatency=80
resources: irq:23 memory:e8121000-e8121fff
*-network
description: Ethernet interface
product: SiS900 PCI Fast Ethernet
vendor: Silicon Integrated Systems [SiS]
physical id: 4
bus info: pci@0000:00:04.0
logical name: eth0
version: 91
serial: 00:11:5b:87:55:17
size: 100Mbit/s
capacity: 100Mbit/s
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=sis900 driverversion=v1.08.10 Apr. 2 2006 duplex=full latency=32 maxlatency=11 mingnt=52 multicast=yes port=MII speed=100Mbit/s
resources: irq:19 ioport:e400(size=256) memory:e8122000-e8122fff memory:7c000000-7c01ffff
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.

"VGA compatible controller: Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter"

Poderia postar a saida do comando:
#lspci -v | grep -A12 "VGA"

Vamos ver que modulo está sendo carregado.

-eu instalaria o XUBUNTU num "pc antigo" com processador celeron
-para ativar o driver-video
sistema >> administração >> DRIVERS >> ativar driver recomendado

lspci -v | grep -A12 "VGA"
01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter (prog-if 00 [VGA controller])
Subsystem: Elitegroup Computer Systems Device 1814
Flags: 66MHz, medium devsel, IRQ 10
BIST result: 00
Memory at e0000000 (32-bit, prefetchable) [size=128M]
Memory at e8000000 (32-bit, non-prefetchable) [size=128K]
I/O ports at d000 [size=128]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel modules: sisfb

Se eu fizer o que você recomenda; é possivel reverter caso não fique melhor?

Meu Ubuntu é o 11.10.

Eu fui em configurações do sistema; cliquei no icone "Drivers Adicionais" Ficou procurando por alguns segundos "drivers disponiveis"

E deu como resposta que: não há drivers prorpietario em uso no sistema. Creio que todos os drivers são do proprio sistema Ubuntu.

Portanto; se eu fizer a sua dica iria mudar para melhor? Pioraria, ou daria na mesma?

Sou leigo e não entendo quase nada. Por isso dessas minhas duvidas.