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Tried upgrading 256Mb of PC100 memory to 512Mb and it does nothing. Are there differences between PC100 memory DIMMs? This thing sees to be very particular about what it uses for memory.
I removed the two 128mb PC-100's that work fine, replaced them with two 256mb PC-100's and nothing happens when i turn on the laptop. Are there differences in PC-100 dimms that I need to be aware of? I also have an old Toshiba TECRA that uses these (PC-100's), but these new PC-100's i got don't work in there either. But they work fine in Dell C800's, so there has to be some subtle difference I'm not seeing.I removed the two 128mb PC-100's that work fine, replaced them with two 256mb PC-100's and nothing happens when i turn on the laptop. Are there differences in PC-100 dimms that I need to be aware of? I also have an old Toshiba TECRA that uses these (PC-100's), but these new PC-100's i got don't work in there either. But they work fine in Dell C800's, so there has to be some subtle difference I'm not seeing.
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First make sure the memory is the same PC 100 , then make sure the chips are fully seated. and try rebooting computer. If you mismatch the Dimms the memory wont be recognized by the computer.
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The laptop needs pc100 not 133 ram. it may be able to work on 133 but if you already have a pc100 stick in there it wont boot up. but all the recommended ram is only pc 100 and the Maximum it supports total is 512 mb
PC66 SDRAM PC66 SDRAM is the original module speed of SDRAM. PC66 SDRAM was the earliest version of SDRAM and therefore came in a number of smaller megabyte sizes than later versions. Most early motherboards were rated for PC66 SDRAM. The available sizes are 32MB (megabytes), 64MB and 128MB. PC100 SDRAM
PC100 SDRAM was released after PC66 SDRAM and runs at a higher speed. It has the same number of pins as the earlier memory module and is capable of utilizing the same RAM slot. The only difference when installing this SDRAM in compatible computers with older systems (PC66 slots) is that the SDRAM will run at a slower speed. PC100 RAM comes in sizes such as 32MB, 64MB, 128MB, 256MB and 512MB. PC133 SDRAM
The last generation of SDRAM is PC133. The PC133 memory provided a speed upgrade and comes in larger sizes than previous generations of SDRAM. PC133 modules are backward compatible with older SDRAM slots. The PC133 memory, however, will be forced to run at the slot's slower bus speed (PC66 or PC100). The memory comes in sizes like 128MB, 256MB, 512MB and 1024MB.
According to the user manual for your laptop, it can only support pc-100 memory. If your going to upgrade your memory just make sure you use pc-100 and also the max amount of memory is 256mb in each slot so you would be maxed out at 512MB.
Hold on a second.. I have fixed a number of T21's and I recall that these units are super anal about the type of RAM they use. I am pretty sure that they require PC100 and will not accept PC133.
One second.... Ok, I just opened up my T21 and it has FRU 20l0255 which is PC 100. Here is a link to the specs. I have tried using PC133 and the same think happens - just does not boot. Nothing.
according to ibm
you are allowed only pc100 memory with a maximum of 512mb.
when handling memory make sure you are grounded before touching any memory chips.
try getting another set of 256mb chips and grounding yourself before installing them.
Mark
Your emachines eMachines T1100
only supports modules made with a specific type of chip. Should you
find what seems to be the exact same memory elsewhere for a lower
price, it is very possible that the cheaper memory will not work in
your computer. From what I see you should use straight PC-133 Try a site like Kahlon.com-they make sure it works with your computer as would kingston or corsair... Your maximum amount of ram is only 256mb total. hope this helps...good luck- please leave a rating...thank you kindly
Since this is an older machine, the performance can't be boosted very much. The maximum performance you can get from this machine is 1ghz processor, with 512mb RAM. The 1ghz processor is the biggest processor that is compatible, and unfortunately, the system is base on a 100mhz frequency rating, so PC100 memory is the only compatible memory available. The maximum chip size in PC100 is 256mb, they just don't make them any bigger, so 2x256mb=512mb RAM. As far as the hard drive, it is an IDE drive, and you can get an IDE drive up to 120gb. These are very good and durable machines, just slow, so if you can deal with the lower level of performance, this machine will last years. Also, these are upgradeable to XP pro, but not Vista.
I removed the two 128mb PC-100's that work fine, replaced them with two 256mb PC-100's and nothing happens when i turn on the laptop. Are there differences in PC-100 dimms that I need to be aware of? I also have an old Toshiba TECRA that uses these (PC-100's), but these new PC-100's i got don't work in there either. But they work fine in Dell C800's, so there has to be some subtle difference I'm not seeing.
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