Hi,

I am planning to buy more memory for my notebook. I know the memory is DDR2, but I do not know if it is 800 or 667.

Does anyone knows a command to discover about the memory clock?

Thanks.

root@darkstar:/home/cristiano# lshw
darkstar
description: Computer
product: Aspire 5050
vendor: Acer, inc.
version: Not Applicable
serial: LXAXD0C0057100A3952502
width: 32 bits
capabilities: smbios-2.4 dmi-2.4 smp-1.4 smp
configuration: boot=oem-specific cpus=1 uuid=C09703C1-B887-D811-8CC4-001636FC4154
*-core
description: Motherboard
product: Prespa M
vendor: Acer, Inc.
physical id: 0
version: Not Applicable
serial: LXAXD0C0057100A3952502
*-firmware
description: BIOS
vendor: Acer
physical id: 0
version: v1.3303 (01/23/07)
size: 107KiB
capacity: 960KiB
capabilities: isa pci pcmcia pnp upgrade shadowing escd cdboot acpi usb biosbootspecification
*-cpu
description: CPU
product: AMD Turion(tm) 64 Mobile Technology MK-38
vendor: Advanced Micro Devices [AMD]
physical id: 4
bus info: cpu@0
version: 15.12.2
slot: Socket M2/S1G1
size: 2200MHz
capacity: 2200MHz
width: 64 bits
clock: 133MHz
capabilities: boot fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt rdtscp x86-64 3dnowext 3dnow up pni cx16 lahf_lm svm extapic cr8_legacy
*-cache:0
description: L2 cache
physical id: 5
slot: L2 Cache
size: 512KiB
capacity: 1MiB
capabilities: synchronous internal write-back
*-cache:1
description: L1 cache
physical id: 0
size: 128KiB
*-cache:2
description: L2 cache
physical id: 1
size: 512KiB
*-memory
description: System Memory
physical id: 1b
slot: System board or motherboard
size: 1GiB
*-bank:0
description: DIMM DDR2 Synchronous
physical id: 0
slot: S1
size: 512MiB
width: 64 bits
*-bank:1
description: DIMM DDR2 Synchronous
physical id: 1
slot: S2
size: 512MiB
width: 64 bits
*-pci:0
description: Host bridge
product: RS480 Host Bridge
vendor: ATI Technologies Inc
physical id: 100
bus info: pci@0000:00:00.0
version: 10
width: 32 bits
clock: 66MHz
configuration: latency=64
*-pci:0
description: PCI bridge
product: RS480 PCI Bridge
vendor: ATI Technologies Inc
physical id: 1
bus info: pci@0000:00:01.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: pci ht normal_decode bus_master cap_list
resources: ioport:9000(size=4096) memory:d0100000-d01fffff ioport:d4000000(size=67108864)
*-display
description: VGA compatible controller
product: RS482 [Radeon Xpress 200M]
vendor: ATI Technologies Inc
physical id: 5
bus info: pci@0000:01:05.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: pm vga_controller bus_master cap_list rom
configuration: driver=fglrx_pci latency=255 mingnt=8
resources: irq:17 memory:d4000000-d7ffffff(prefetchable) ioport:9000(size=256) memory:d0100000-d010ffff memory:d0120000-d013ffff(prefetchable)
*-pci:1
description: PCI bridge
product: RS480 PCI Bridge
vendor: ATI Technologies Inc
physical id: 4
bus info: pci@0000:00:04.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport-driver
resources: irq:0 memory:d0200000-d02fffff
*-network
description: Wireless interface
product: AR242x 802.11abg Wireless PCI Express Adapter
vendor: Atheros Communications Inc.
physical id: 0
bus info: pci@0000:02:00.0
logical name: wifi0
version: 01
serial: 00:19:7d:f7:17:2a
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list logical ethernet physical wireless
configuration: broadcast=yes driver=ath_pci ip=192.168.1.2 latency=0 multicast=yes wireless=IEEE 802.11g
resources: irq:16 memory:d0200000-d020ffff
*-pci:2
description: PCI bridge
product: RS480 PCI Bridge
vendor: ATI Technologies Inc
physical id: 5
bus info: pci@0000:00:05.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport-driver
resources: irq:0
*-pci:3
description: PCI bridge
product: RS480 PCI Bridge
vendor: ATI Technologies Inc
physical id: 6
bus info: pci@0000:00:06.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport-driver
resources: irq:0
*-pci:4
description: PCI bridge
product: RS480 PCI Bridge
vendor: ATI Technologies Inc
physical id: 7
bus info: pci@0000:00:07.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport-driver
resources: irq:0
*-ide:0
description: IDE interface
product: IXP SB400 Serial ATA Controller
vendor: ATI Technologies Inc
physical id: 12
bus info: pci@0000:00:12.0
logical name: scsi2
version: 80
width: 32 bits
clock: 66MHz
capabilities: ide pm msi bus_master cap_list rom emulated
configuration: driver=sata_sil latency=64
resources: irq:22 ioport:8440(size=8) ioport:8434(size=4) ioport:8438(size=8) ioport:8430(size=4) ioport:8400(size=16) memory:d0004000-d00041ff memory:54000000-5407ffff(prefetchable)
*-disk
description: ATA Disk
product: Hitachi HTS54161
vendor: Hitachi
physical id: 0.0.0
bus info: scsi@2:0.0.0
logical name: /dev/sda
version: SBDO
serial: SB2D41E4JDZKDE
size: 111GiB (120GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 signature=2dfc2dfb
*-volume:0
description: Windows NTFS volume
physical id: 1
bus info: scsi@2:0.0.0,1
logical name: /dev/sda1
logical name: /mnt/sda1
version: 3.1
serial: b04f71d8-d6af-4549-b7bf-e806d3450ee4
size: 19GiB
capacity: 19GiB
capabilities: primary bootable ntfs initialized
configuration: clustersize=4096 created=2009-05-25 02:08:19 filesystem=ntfs mount.fstype=fuseblk mount.options=rw,nosuid,nodev,noexec,user_id=0,group_id=0,allow_other,blksize=4096 state=mounted
*-volume:1
description: Linux swap volume
physical id: 2
bus info: scsi@2:0.0.0,2
logical name: /dev/sda2
version: 1
serial: 854c0ce2-f237-4d12-8e4d-fffbc752ed44
size: 972MiB
capacity: 972MiB
capabilities: primary nofs swap initialized
configuration: filesystem=swap pagesize=4096
*-volume:2
description: Linux filesystem partition
physical id: 3
bus info: scsi@2:0.0.0,3
logical name: /dev/sda3
logical name: /home
version: 3.6
serial: 20e25881-4027-448b-ba1f-fbe71bd9e5cd
size: 46GiB
capacity: 46GiB
capabilities: primary journaled reiserfs initialized
configuration: filesystem=reiserfs hash=r5 mount.fstype=reiserfs mount.options=rw state=mounted
*-volume:3
description: Extended partition
physical id: 4
bus info: scsi@2:0.0.0,4
logical name: /dev/sda4
size: 44GiB
capacity: 44GiB
capabilities: primary extended partitioned partitioned:extended
*-logicalvolume:0
description: Linux filesystem partition
physical id: 5
logical name: /dev/sda5
logical name: /
capacity: 18GiB
configuration: mount.fstype=reiserfs mount.options=rw state=mounted
*-logicalvolume:1
description: Linux filesystem partition
physical id: 6
logical name: /dev/sda6
logical name: /mnt/sda6
capacity: 17GiB
configuration: mount.fstype=reiserfs mount.options=rw,nosuid,nodev,noexec state=mounted
*-logicalvolume:2
description: HPFS/NTFS partition
physical id: 7
logical name: /dev/sda7
logical name: /mnt/sda7
capacity: 8730MiB
configuration: mount.fstype=vfat mount.options=rw,nosuid,nodev,noexec,fmask=0000,dmask=0000,allow_utime=0022,codepage=cp437,iocharset =iso8859-1 state=mounted
*-usb:0
description: USB Controller
product: IXP SB400 USB Host Controller
vendor: ATI Technologies Inc
physical id: 13
bus info: pci@0000:00:13.0
version: 80
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci_hcd latency=64
resources: irq:19 memory:d0005000-d0005fff
*-usbhost
product: OHCI Host Controller
vendor: Linux 2.6.27.7-smp ohci_hcd
physical id: 1
bus info: usb@2
logical name: usb2
version: 2.06
capabilities: usb-1.10
configuration: driver=hub slots=4 speed=12.0MB/s
*-usb
description: Mouse
product: USB-PS/2 Optical Mouse
vendor: Logitech
physical id: 3
bus info: usb@2:3
version: 18.00
capabilities: usb-2.00
configuration: driver=usbhid maxpower=98mA speed=1.5MB/s
*-usb:1
description: USB Controller
product: IXP SB400 USB Host Controller
vendor: ATI Technologies Inc
physical id: 13.1
bus info: pci@0000:00:13.1
version: 80
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci_hcd latency=64
resources: irq:19 memory:d0006000-d0006fff
*-usbhost
product: OHCI Host Controller
vendor: Linux 2.6.27.7-smp ohci_hcd
physical id: 1
bus info: usb@3
logical name: usb3
version: 2.06
capabilities: usb-1.10
configuration: driver=hub slots=4 speed=12.0MB/s
*-usb:2
description: USB Controller
product: IXP SB400 USB2 Host Controller
vendor: ATI Technologies Inc
physical id: 13.2
bus info: pci@0000:00:13.2
version: 80
width: 32 bits
clock: 66MHz
capabilities: pm ehci bus_master cap_list
configuration: driver=ehci_hcd latency=64
resources: irq:19 memory:d0007000-d0007fff
*-usbhost
product: EHCI Host Controller
vendor: Linux 2.6.27.7-smp ehci_hcd
physical id: 1
bus info: usb@1
logical name: usb1
version: 2.06
capabilities: usb-2.00
configuration: driver=hub slots=8 speed=480.0MB/s
*-usb
description: Video
product: AcerOrbiCam
vendor: SuYin
physical id: 3
bus info: usb@1:3
version: 1.00
serial: CN0316-OV03-VA-01.00.00
capabilities: usb-2.00
configuration: driver=uvcvideo maxpower=500mA speed=480.0MB/s
*-serial
description: SMBus
product: IXP SB400 SMBus Controller
vendor: ATI Technologies Inc
physical id: 14
bus info: pci@0000:00:14.0
version: 83
width: 32 bits
clock: 66MHz
capabilities: ht cap_list
configuration: driver=piix4_smbus latency=0
resources: irq:0 ioport:8410(size=16) memory:fed00000-fed003ff
*-ide:1
description: IDE interface
product: IXP SB400 IDE Controller
vendor: ATI Technologies Inc
physical id: 14.1
bus info: pci@0000:00:14.1
version: 80
width: 32 bits
clock: 66MHz
capabilities: ide msi bus_master cap_list
configuration: driver=ATIIXP_IDE latency=0
resources: irq:16 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:8420(size=16)
*-ide:0
description: IDE Channel 0
physical id: 0
bus info: ide@0
logical name: ide0
clock: 66MHz
*-cdrom
description: DVD-RAM writer
product: HL-DT-ST DVDRAM GSA-T10N
physical id: 0
bus info: ide@0.0
logical name: /dev/hda
version: PP02
serial: KZ671NJ2154
capabilities: packet atapi cdrom removable nonmagnetic dma lba iordy pm audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: mode=udma2 status=nodisc
*-ide:1
description: IDE Channel 1
physical id: 1
bus info: ide@1
logical name: ide1
clock: 66MHz
*-multimedia
description: Audio device
product: IXP SB4x0 High Definition Audio Controller
vendor: ATI Technologies Inc
physical id: 14.2
bus info: pci@0000:00:14.2
version: 01
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=HDA Intel latency=64
resources: irq:16 memory:d0000000-d0003fff
*-isa
description: ISA bridge
product: IXP SB400 PCI-ISA Bridge
vendor: ATI Technologies Inc
physical id: 14.3
bus info: pci@0000:00:14.3
version: 80
width: 32 bits
clock: 66MHz
capabilities: isa bus_master
configuration: latency=0
*-pci:5
description: PCI bridge
product: IXP SB400 PCI-PCI Bridge
vendor: ATI Technologies Inc
physical id: 14.4
bus info: pci@0000:00:14.4
version: 80
width: 32 bits
clock: 66MHz
capabilities: pci subtractive_decode bus_master
resources: ioport:a000(size=4096) memory:d0300000-d03fffff memory:50000000-53ffffff(prefetchable)
*-pcmcia
description: CardBus bridge
product: CB-712/4 Cardbus Controller
vendor: ENE Technology Inc
physical id: 1
bus info: pci@0000:08:01.0
version: 10
width: 32 bits
clock: 33MHz
capabilities: pcmcia bus_master cap_list
configuration: driver=yenta_cardbus latency=176 maxlatency=5 mingnt=192
resources: irq:23 memory:d0300000-d0300fff ioport:a400(size=256) ioport:a800(size=256) memory:50000000-53ffffff(prefetchable) memory:58000000-5bffffff
*-memory:0 UNCLAIMED
description: FLASH memory
product: ENE PCI Memory Stick Card Reader Controller
vendor: ENE Technology Inc
physical id: 1.1
bus info: pci@0000:08:01.1
version: 01
width: 32 bits
clock: 33MHz (30.3ns)
capabilities: pm bus_master cap_list
configuration: latency=64 maxlatency=4 mingnt=1
resources: memory:d0301000-d030107f
*-generic
description: SD Host controller
product: ENE PCI Secure Digital Card Reader Controller
vendor: ENE Technology Inc
physical id: 1.2
bus info: pci@0000:08:01.2
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: driver=sdhci-pci latency=64 maxlatency=72 mingnt=32
resources: irq:22 memory:d0301400-d03014ff
*-memory:1 UNCLAIMED
description: FLASH memory
product: FLASH memory: ENE Technology Inc:
vendor: ENE Technology Inc
physical id: 1.3
bus info: pci@0000:08:01.3
version: 01
width: 32 bits
clock: 33MHz (30.3ns)
capabilities: pm bus_master cap_list
configuration: latency=64 maxlatency=4 mingnt=1
resources: memory:d0301800-d030187f
*-memory:2
description: FLASH memory
product: SD/MMC Card Reader Controller
vendor: ENE Technology Inc
physical id: 1.4
bus info: pci@0000:08:01.4
version: 01
width: 32 bits
clock: 33MHz (30.3ns)
capabilities: pm cap_list
configuration: driver=sdhci-pci latency=0 maxlatency=72 mingnt=32
resources: irq:22 memory:d0301100-d03011ff
*-network
description: Ethernet interface
product: RTL-8139/8139C/8139C+
vendor: Realtek Semiconductor Co., Ltd.
physical id: 2
bus info: pci@0000:08:02.0
logical name: eth0
version: 10
serial: 00:16:36:fc:41:54
size: 10MB/s
capacity: 100MB/s
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=8139too driverversion=0.9.28 duplex=half latency=64 link=no maxlatency=64 mingnt=32 multicast=yes port=MII speed=10MB/s
resources: irq:20 ioport:a000(size=256) memory:d0301c00-d0301cff
*-pci:1
description: Host bridge
product: K8 [Athlon64/Opteron] HyperTransport Technology Configuration
vendor: Advanced Micro Devices [AMD]
physical id: 101
bus info: pci@0000:00:18.0
version: 00
width: 32 bits
clock: 33MHz
*-pci:2
description: Host bridge
product: K8 [Athlon64/Opteron] Address Map
vendor: Advanced Micro Devices [AMD]
physical id: 102
bus info: pci@0000:00:18.1
version: 00
width: 32 bits
clock: 33MHz
*-pci:3
description: Host bridge
product: K8 [Athlon64/Opteron] DRAM Controller
vendor: Advanced Micro Devices [AMD]
physical id: 103
bus info: pci@0000:00:18.2
version: 00
width: 32 bits
clock: 33MHz
*-pci:4
description: Host bridge
product: K8 [Athlon64/Opteron] Miscellaneous Control
vendor: Advanced Micro Devices [AMD]
physical id: 104
bus info: pci@0000:00:18.3
version: 00
width: 32 bits
clock: 33MHz
configuration: driver=k8temp
resources: irq:0

The fastest way is probably to go to a memory site (e.g. crucial.com) with the make and model number of your computer and let them tell you.

You could use dmidecode. It is probably not installed by default. You should be able to install it from your distribution's package repository.

You should run dmidecode under the root account. My dmidecode listed the memory controller with supported speeds of 70 ns and 60 ns. It also listed the memory modules with speed listed as unknown. That shows that dmidecode can only show you what your motherboard is willing to show you.

I had better luck using lshw under the root account. The board clock speed was listed under CPU information.