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Novice memory question ....
Posted: Tue Mar 07, 2006 5:24 pm
by rdrbill
I want to upgrade the memory in my 660E (55U). Can virtually any PC100 128MB SODIMM be used as long as its non-buffered and non-ECC ?
Thanks - Bill
Posted: Tue Mar 07, 2006 9:46 pm
by Laptop_wizard
First off, I think you mean a "600E" right?
Second, Yes any "brand" will work if that's what your asking .
Posted: Tue Mar 07, 2006 10:09 pm
by pianowizard
I agree, the 600E is less picky about 128MB sticks than 256MB ones. If you want to use 256MB modules, you need to make sure it has a total of 16 chips, which makes it low density.
Posted: Tue Mar 07, 2006 10:10 pm
by pianowizard
Wow, I just noticed that two wizards have responded to this thread!
Posted: Wed Mar 08, 2006 1:38 am
by rdrbill
Yes, 600E is what I meant. I noticed that some manufacturers of memory modules specifically offer a "01K1150" memory which tends to be more expensive than the general purpose 128MB modules they offer. So I was wondering if there was anything special about the memory used in the Thinkpads or was it "industry-standard" 144-pin SODIMMS. Thanks.
BTW- does anyone know if IBM ever put the "tactile feedback" Trackpoint stick in production?
Posted: Thu Mar 09, 2006 7:53 pm
by rdrbill
Another question for the wizzards... One mentioned using 256MB modules. Is there a physical limit of 288MB on the DRAM interface? (32MB + 256MB) or can it actually support more memory ? Thanks again.
Posted: Thu Mar 09, 2006 7:59 pm
by tfflivemb2
Most 600Es accept up to 544mb ram (256mb X2, plus 32mb onboard). The exception might be the 55x and A5x series. They even have a different BIOS than the remaining 600E models.
The 55U that I have seems to be limited to the 288mb limit. When I place a 256mb low density stick in by itself, it will still only registers half the stick. For the record, I have even tested the ram chip in a different system and it registered 100%.