DDR2 5300 вместо DDR2 4300

bash-3.2# lspci | grep "Host bridge"
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)

bash-3.2# dmidecode -t memory
# dmidecode 2.9
SMBIOS 2.4 present.

Handle 0x1000, DMI type 16, 15 bytes
Physical Memory Array
        Location: System Board Or Motherboard
        Use: System Memory
        Error Correction Type: None
        Maximum Capacity: 4 GB
        Error Information Handle: Not Provided
        Number Of Devices: 2

Handle 0x1100, DMI type 17, 27 bytes
Memory Device
        Array Handle: 0x1000
        Error Information Handle: Not Provided
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 512 MB
        Form Factor: DIMM
        Set: None
        Locator: DIMM_A
        Bank Locator: Not Specified
        Type: DDR
        Type Detail: Synchronous
        Speed: 533 MHz (1.9 ns)
        Manufacturer: 7F7F7F0B00000000
        Serial Number: B361F808
        Asset Tag: 000644
        Part Number: NT512T64UH8B0FN-37

Handle 0x1101, DMI type 17, 27 bytes
Memory Device
        Array Handle: 0x1000
        Error Information Handle: Not Provided
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 512 MB
        Form Factor: DIMM
        Set: None
        Locator: DIMM_B
        Bank Locator: Not Specified
        Type: DDR
        Type Detail: Synchronous
        Speed: 667 MHz (1.5 ns)
        Manufacturer: 7F7F7F7F7FDC0000
        Serial Number: 00000000
        Asset Tag: 000000
        Part Number: HEXON             

bash-3.2# free
             total       used       free     shared    buffers     cached
Mem:        905308     364000     541308          0       9652     200352
-/+ buffers/cache:     153996     751312
Swap:      1646652          0    1646652