RAM SPEED FOR 15" MacBook Pro (Late 2007 2.2GHz)

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RAM SPEED FOR 15" MacBook Pro (Late 2007 2.2GHz)

Hi, I have a 15" MacBook Pro 2.2 GHz, the late 2007 version, I want to upgrade its 2GB default ram to 4GB, but is the specs i read that this computer has a 800MHz frontside bus, and the memory has 667, so, if I put two Kingston 2 GB - SO DIMM 200-pin DDR2 800 MHz memory units in the mac, will it work, since the bus is 800Mhz???? thanks in advance

Macbook Pro, Mac OS X (10.5.6)

Posted on Feb 16, 2009 8:37 AM

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Answer 1

Feb 16, 2009 8:41 AM in response to Nehemiascr

The RAM specs for your MBP are 667 MHz PC2-5300 DDR2 SDRAM. I don't believe that it will work with 800 MHz sticks - even if it does, they will certainly run at 667 MHz, not 800 MHz.

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Answer 2

Nehemiascr Author

Level 1

8 points

Feb 16, 2009 8:54 AM in response to neuroanatomist

thanks for the answer, now, why then this computer has an 800Mhz bus if it will only run @ 667Mhz?

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Answer 3

Feb 16, 2009 9:14 AM in response to Nehemiascr

The short answer is that RAM speed and system bus speed do not have to match. The longer answer is that the FSB is the data path between the CPU and the north side bridge, which then connects to the RAM. Thus, the two speeds don't necessarily have to match; whether or not they should depends on the chipset (for example, the generic Pentium 4 motherboard had an 800 MHz FSB, but only supported RAM up to 533 MHz). Other systems, such as the newest MBPs running a 1066 MHZ FSB also support 1066 MHz RAM (PC3-8500 DDR3, in this case).

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