128 bits RAM on imac G5 ?

in Current Mac Hardware edited January 2014
hi there

in order to get the 128 bits bus on the imac G5, is it mandatory to have 2 strictly identical ram ?

or same size is enough ?

because i ordered 512 Mo on 1 slot for my BTO imac

and will add 512 Mo later this week

would i benefit from 128 bits bus ?



  • Reply 1 of 2
    telomartelomar Posts: 1,804member
    Same size and same latency.
  • Reply 2 of 2
    mr. hmr. h Posts: 4,720member

    Originally posted by Telomar

    Same size and same latency.

    It actually even goes beyond that!

    A memory DIMM has lots of memory chips (I.C.s) on it, to get a 512 DIMM you can use 16 32 MB chips, 8 64 MB chips or 4 128 MB chips. If you got two 512 MB DIMMs with the same latency, but one had 16 32 MB chips and the other had 8 64 MB chips, these would not give you the 128 bit bus.

    It is best to buy a matched pair of RAM DIMMS. Manufacturers such a corsair sell DIMMS in matched pairs.
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