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What is PC3200B and will it work in a PM G5?
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Grizzled Veteran
Join Date: Mar 2003
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Saw a good deal on some PC3200 chips, but in small print the specs describe it as PC3200B. I've never seen a "B" at the end of PC3200 - so I'm wondering if it's compatible with my 4-slot PM G5 2.0 GHz.
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MacBook and iMac Core 2 Duo 24"
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Grizzled Veteran
Join Date: Mar 2003
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I'll reply to my own message... Hell, no! PC3200B is some strange low profile chip. You can shove them in your PowerMac and it will probably even boot, but you won't have any additional RAM to access. Have a super day!
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MacBook and iMac Core 2 Duo 24"
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Mac Enthusiast
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Mac Enthusiast
Join Date: Dec 2002
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strange... wouldn't "low profile" just imply that the physical size of the DIMM is smaller (less height) than a "regular" DIMM? e.g. a lot of networking gear is limited in height and therefore only accepts low profile memory.
given that it's just a spec related to the DIMM height, shouldn't these work just fine in your Mac?
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MacBook Pro 13"/2.66 (09/2010), Mac Mini c2d/1.83 (01/2008)
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Addicted to MacNN
Join Date: Oct 2001
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Perhaps it is extremely high density, hence low-profile, hence no-workie?
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I'm a bird. I am the 1% (of pets).
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Mac Enthusiast
Join Date: Dec 2002
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Originally Posted by Eriamjh
Perhaps it is extremely high density, hence low-profile, hence no-workie?
could be that it means "buffered" which seems to imply "registered" which means, it's a different kind of ram. registered is used in designs when the density of memory chips is too high (the capacitive load on the bus becomes too high, which causes bus speed to decrease).
buffered != low profile.
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MacBook Pro 13"/2.66 (09/2010), Mac Mini c2d/1.83 (01/2008)
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Admin Emeritus  Join Date: Oct 1999
Location: Zurich, Switzerland
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Originally Posted by chrisutley
I'll reply to my own message... Hell, no! PC3200B is some strange low profile chip. You can shove them in your PowerMac and it will probably even boot, but you won't have any additional RAM to access. Have a super day!
On some of Intel's RAM chips. 3200A vs 3200B refer to the CAS latency.
It has nothing to do with high- vs. low-profile, which is usually irrelevant to compatibility anyway, space considerations notwithstanding.
tooki
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Forum Regular
Join Date: Aug 2005
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I've been tracking down the nomenclature "PC3200B" - It is not a JEDEC term, so it is not a 'standard', it does not refer to Buffered or Unbuffered, it does look like it is referring to CAS Latency, where PC3200A is CL2.5 and PC3200B is PC3.0 at 200 MHz (DDR 400 MHz) as tooki said, at least in relation to Nanya and Elixir RAM.
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