RAM upgrade Macbook Pro early 2008

Discussion in 'MacBook Pro' started by psychedelia, Mar 1, 2013.

  1. psychedelia macrumors regular

    Jan 28, 2009
    So i bought a pair of Hypertec 40Y7735-HY (2 GB,DDR2 SDRAM,667 MHz, SO DIMM 200-pin) to upgrade my old Macbook Pro early 2008 (Penryn I belieive).

    So after installing the two new sticks, the computer won't boot. However, when pulling one of the new sticks out replacing it with the old one the computer starts and reads 3 GB of memory. Trying the same setup with the other new stick together with the old stick, same result.

    I've googled and searched around, and I see similar stories with 800 Mhz incompatible memory, but surely the memory i bought is 667 Mhz, and the work independently.

    Does anyone have any good advice on this matter (besides of course, don't be a cheap ass and buy more expensive memory ;D)?
  2. robvas macrumors 68030

    Mar 29, 2009
    Perhaps you are missing a firmware update? You should be able to put 4GB+2GB in there for a total of 6GB.
  3. psychedelia thread starter macrumors regular

    Jan 28, 2009
    It's got the latest firmware updates (running 10.7.52 or whatever the last to digits are). And I'm even only trying to run 4 GB, so I really don't get it.

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