quanra ram posso installare sul mio pc?

Salve a tutti. Non riesco a capire se come massima capacita posso mettere 4 GB x slot o 4 totali.

alessio@alessio-Notebook-PC:~$ sudo dmidecode -t memory | grep Capacity
[sudo] password for alessio: 
    Maximum Capacity: 4 GB

alessio@alessio-Notebook-PC:~$ sudo lshw -sanitize
computer                  
    description: Notebook
    product: Notebook PC ()
    vendor: MiTAC
    version: REFERENCE
    serial: [REMOVED]
    width: 64 bits
    capabilities: smbios-2.5 dmi-2.5 vsyscall32
    configuration: boot=oem-specific chassis=notebook uuid=[REMOVED]
  *-core
       description: Motherboard
       product: Notebook PC
       vendor: MiTAC
       physical id: 0
       version: REFERENCE
       serial: [REMOVED]
     *-firmware
          description: BIOS
          vendor: Phoenix Technologies Ltd.
          physical id: 0
          version: R1.03.000000
          date: 10/23/2009
          size: 102KiB
          capacity: 960KiB
          capabilities: pci pnp upgrade shadowing escd cdboot bootselect edd int5printscreen int9keyboard int14serial int17printer int10video acpi usb ls120boot zipboot smartbattery biosbootspecification
     *-cpu
          description: CPU
          product: Intel(R) Core(TM)2 Duo CPU     P8700  @ 2.53GHz
          vendor: Intel Corp.
          physical id: 4
          bus info: cpu@0
          version: Intel(R) Core(TM)2 Duo CPU     P8700  @ 2.53GHz
          slot: Socket 479
          size: 1600MHz
          capacity: 1600MHz
          width: 64 bits
          clock: 133MHz
          capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm ida dtherm tpr_shadow vnmi flexpriority cpufreq
          configuration: cores=2 enabledcores=2 threads=2
        *-cache:0
             description: L1 cache
             physical id: 5
             slot: L1 Cache
             size: 64KiB
             capacity: 64KiB
             capabilities: asynchronous internal write-back
        *-cache:1
             description: L2 cache
             physical id: 6
             slot: L2 Cache
             size: 3MiB
             capabilities: burst internal write-through unified
     *-memory
          description: System Memory
          physical id: d
          slot: System board or motherboard
          size: 3GiB
        *-bank:0
             description: DIMM DDR2 Synchronous 667 MHz (1,5 ns)
             product: 4D342037305432383634445A332D43453620
             vendor: 48spaces
             physical id: 0
             serial: [REMOVED]
             slot: S1
             size: 1GiB
             width: 16 bits
             clock: 667MHz (1.5ns)
        *-bank:1
             description: DIMM DDR2 Synchronous 667 MHz (1,5 ns)
             product: 31364854463235363634485A2D3830304A31
             vendor: 48spaces
             physical id: 1
             serial: [REMOVED]
             slot: S2
             size: 2GiB
             width: 8 bits
             clock: 667MHz (1.5ns)
     *-pci
          description: Host bridge
          product: MCP79 Host Bridge
          vendor: NVIDIA Corporation
          physical id: 100
          bus info: pci@0000:00:00.0
          version: b1
          width: 32 bits
          clock: 66MHz
        *-memory:0 UNCLAIMED
             description: RAM memory
             product: MCP79 Memory Controller
             vendor: NVIDIA Corporation
             physical id: 0.1
             bus info: pci@0000:00:00.1
             version: b1
             width: 32 bits
             clock: 66MHz (15.2ns)
             capabilities: bus_master
             configuration: latency=0
        *-isa
             description: ISA bridge
             product: MCP79 LPC Bridge
             vendor: NVIDIA Corporation
             physical id: 3
             bus info: pci@0000:00:03.0
             version: b2
             width: 32 bits
             clock: 66MHz
             capabilities: isa bus_master
             configuration: latency=0
             resources: ioport:1c00(size=256)
        *-memory:1 UNCLAIMED
             description: RAM memory
             product: MCP79 Memory Controller
             vendor: NVIDIA Corporation
             physical id: 3.1
             bus info: pci@0000:00:03.1
             version: b1
             width: 32 bits
             clock: 66MHz (15.2ns)
             configuration: latency=0
        *-serial
             description: SMBus
             product: MCP79 SMBus
             vendor: NVIDIA Corporation
             physical id: 3.2
             bus info: pci@0000:00:03.2
             version: b1
             width: 32 bits
             clock: 66MHz
             capabilities: pm cap_list
             configuration: driver=nForce2_smbus latency=0
             resources: irq:10 ioport:3080(size=64) ioport:3040(size=64) ioport:2000(size=64)
        *-memory:2 UNCLAIMED
             description: RAM memory
             product: MCP79 Memory Controller
             vendor: NVIDIA Corporation
             physical id: 3.3
             bus info: pci@0000:00:03.3
             version: b1
             width: 32 bits
             clock: 66MHz (15.2ns)
             configuration: latency=0
        *-processor
             description: Co-processor
             product: MCP79 Co-processor
             vendor: NVIDIA Corporation
             physical id: 3.5
             bus info: pci@0000:00:03.5
             version: b1
             width: 32 bits
             clock: 66MHz
             capabilities: bus_master
             configuration: driver=nvidia latency=0 maxlatency=1 mingnt=3
             resources: irq:18 memory:fe500000-fe57ffff
        *-usb:0
             description: USB controller
             product: MCP79 OHCI USB 1.1 Controller
             vendor: NVIDIA Corporation
             physical id: 4
             bus info: pci@0000:00:04.0
             version: b1
             width: 32 bits
             clock: 66MHz
             capabilities: pm ohci bus_master cap_list
             configuration: driver=ohci-pci latency=0 maxlatency=1 mingnt=3
             resources: irq:23 memory:fe786000-fe786fff
        *-usb:1
             description: USB controller
             product: MCP79 EHCI USB 2.0 Controller
             vendor: NVIDIA Corporation
             physical id: 4.1
             bus info: pci@0000:00:04.1
             version: b1
             width: 32 bits
             clock: 66MHz
             capabilities: debug pm ehci bus_master cap_list
             configuration: driver=ehci-pci latency=0 maxlatency=1 mingnt=3
             resources: irq:22 memory:fe789000-fe7890ff
        *-usb:2
             description: USB controller
             product: MCP79 OHCI USB 1.1 Controller
             vendor: NVIDIA Corporation
             physical id: 6
             bus info: pci@0000:00:06.0
             version: b1
             width: 32 bits
             clock: 66MHz
             capabilities: pm ohci bus_master cap_list
             configuration: driver=ohci-pci latency=0 maxlatency=1 mingnt=3
             resources: irq:21 memory:fe787000-fe787fff
        *-usb:3
             description: USB controller
             product: MCP79 EHCI USB 2.0 Controller
             vendor: NVIDIA Corporation
             physical id: 6.1
             bus info: pci@0000:00:06.1
             version: b1
             width: 32 bits
             clock: 66MHz
             capabilities: debug pm ehci bus_master cap_list
             configuration: driver=ehci-pci latency=0 maxlatency=1 mingnt=3
             resources: irq:20 memory:fe789400-fe7894ff
        *-multimedia
             description: Audio device
             product: MCP79 High Definition Audio
             vendor: NVIDIA Corporation
             physical id: 8
             bus info: pci@0000:00:08.0
             version: b1
             width: 32 bits
             clock: 66MHz
             capabilities: pm bus_master cap_list
             configuration: driver=snd_hda_intel latency=0 maxlatency=5 mingnt=2
             resources: irq:17 memory:fe780000-fe783fff
        *-pci:0
             description: PCI bridge
             product: MCP79 PCI Bridge
             vendor: NVIDIA Corporation
             physical id: 9
             bus info: pci@0000:00:09.0
             version: b1
             width: 32 bits
             clock: 66MHz
             capabilities: pci subtractive_decode bus_master cap_list
        *-network
             description: Ethernet interface
             product: MCP79 Ethernet
             vendor: NVIDIA Corporation
             physical id: a
             bus info: pci@0000:00:0a.0
             logical name: eth0
             version: b1
             serial: [REMOVED]
             size: 100Mbit/s
             capacity: 1Gbit/s
             width: 32 bits
             clock: 66MHz
             capabilities: pm bus_master cap_list ethernet physical mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
             configuration: autonegotiation=on broadcast=yes driver=forcedeth driverversion=0.64 duplex=full ip=[REMOVED] latency=0 link=yes maxlatency=20 mingnt=1 multicast=yes port=MII speed=100Mbit/s
             resources: irq:19 memory:fe788000-fe788fff ioport:30d0(size=8) memory:fe789c00-fe789cff memory:fe789800-fe78980f
        *-storage
             description: SATA controller
             product: MCP79 AHCI Controller
             vendor: NVIDIA Corporation
             physical id: b
             bus info: pci@0000:00:0b.0
             version: b1
             width: 32 bits
             clock: 66MHz
             capabilities: storage pm msi ahci_1.0 bus_master cap_list
             configuration: driver=ahci latency=0 maxlatency=1 mingnt=3
             resources: irq:40 ioport:30e8(size=8) ioport:30dc(size=4) ioport:30e0(size=8) ioport:30d8(size=4) ioport:30c0(size=16) memory:fe784000-fe785fff
        *-pci:1
             description: PCI bridge
             product: MCP79 PCI Express Bridge
             vendor: NVIDIA Corporation
             physical id: c
             bus info: pci@0000:00:0c.0
             version: b1
             width: 32 bits
             clock: 33MHz
             capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:19
        *-pci:2
             description: PCI bridge
             product: MCP79 PCI Express Bridge
             vendor: NVIDIA Corporation
             physical id: 10
             bus info: pci@0000:00:10.0
             version: b1
             width: 32 bits
             clock: 33MHz
             capabilities: pci pm msi normal_decode bus_master cap_list
             resources: ioport:4000(size=4096) memory:dc000000-dcffffff ioport:de000000(size=301989888)
           *-display
                description: VGA compatible controller
                product: C79 [GeForce 9100M G]
                vendor: NVIDIA Corporation
                physical id: 0
                bus info: pci@0000:03:00.0
                version: b1
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi vga_controller bus_master cap_list rom
                configuration: driver=nvidia latency=0
                resources: irq:23 memory:dc000000-dcffffff memory:e0000000-efffffff memory:de000000-dfffffff ioport:4000(size=128)
        *-pci:3
             description: PCI bridge
             product: MCP79 PCI Express Bridge
             vendor: NVIDIA Corporation
             physical id: 15
             bus info: pci@0000:00:15.0
             version: b1
             width: 32 bits
             clock: 33MHz
             capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:18 ioport:5000(size=4096) memory:fe200000-fe3fffff ioport:fe000000(size=2097152)
        *-pci:4
             description: PCI bridge
             product: MCP79 PCI Express Bridge
             vendor: NVIDIA Corporation
             physical id: 16
             bus info: pci@0000:00:16.0
             version: b1
             width: 32 bits
             clock: 33MHz
             capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:23 ioport:6000(size=4096) memory:fe400000-fe4fffff
           *-network
                description: Wireless interface
                product: RTL8191SEvB Wireless LAN Controller
                vendor: Realtek Semiconductor Co., Ltd.
                physical id: 0
                bus info: pci@0000:06:00.0
                logical name: wlan0
                version: 10
                serial: [REMOVED]
                width: 32 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
                configuration: broadcast=yes driver=rtl8192se driverversion=3.13.0-66-generic firmware=N/A ip=[REMOVED] latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
                resources: irq:23 ioport:6000(size=256) memory:fe400000-fe403fff
        *-pci:5
             description: PCI bridge
             product: MCP79 PCI Express Bridge
             vendor: NVIDIA Corporation
             physical id: 17
             bus info: pci@0000:00:17.0
             version: b1
             width: 32 bits
             clock: 33MHz
             capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:22
        *-pci:6
             description: PCI bridge
             product: MCP79 PCI Express Bridge
             vendor: NVIDIA Corporation
             physical id: 18
             bus info: pci@0000:00:18.0
             version: b1
             width: 32 bits
             clock: 33MHz
             capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:21
     *-scsi:0
          physical id: 1
          logical name: scsi0
          capabilities: emulated
        *-disk
             description: ATA Disk
             product: ST9500325AS
             vendor: Seagate
             physical id: 0.0.0
             bus info: scsi@0:0.0.0
             logical name: /dev/sda
             version: 0003
             serial: [REMOVED]
             size: 465GiB (500GB)
             capabilities: partitioned partitioned:dos
             configuration: ansiversion=5 sectorsize=512 signature=00077f08
           *-volume:0
                description: Extended partition
                physical id: 1
                bus info: scsi@0:0.0.0,1
                logical name: /dev/sda1
                size: 279GiB
                capacity: 279GiB
                capabilities: primary extended partitioned partitioned:extended
              *-logicalvolume:0
                   description: Linux filesystem partition
                   physical id: 5
                   logical name: /dev/sda5
                   logical name: /
                   capacity: 276GiB
                   configuration: mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,data=ordered state=mounted
              *-logicalvolume:1
                   description: Linux swap / Solaris partition
                   physical id: 6
                   logical name: /dev/sda6
                   capacity: 2814MiB
                   capabilities: nofs
           *-volume:1
                description: Windows NTFS volume
                physical id: 2
                bus info: scsi@0:0.0.0,2
                logical name: /dev/sda2
                version: 3.1
                serial: [REMOVED]
                size: 77MiB
                capacity: 100MiB
                capabilities: primary bootable ntfs initialized
                configuration: clustersize=4096 created=2015-10-21 07:36:09 filesystem=ntfs label=System Reserved state=clean
           *-volume:2
                description: Windows NTFS volume
                physical id: 3
                bus info: scsi@0:0.0.0,3
                logical name: /dev/sda3
                version: 3.1
                serial: [REMOVED]
                size: 186GiB
                capacity: 186GiB
                capabilities: primary ntfs initialized
                configuration: clustersize=4096 created=2015-10-21 07:36:16 filesystem=ntfs state=clean
     *-scsi:1
          physical id: 2
          logical name: scsi1
          capabilities: emulated
        *-cdrom
             description: DVD-RAM writer
             product: DVD-RAM UJ870BJ
             vendor: MATSHITA
             physical id: 0.0.0
             bus info: scsi@1:0.0.0
             logical name: /dev/cdrom
             logical name: /dev/sr0
             version: 1.01
             capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
             configuration: ansiversion=5 status=nodisc