Davey Brain wrote:
 
> Franklin wrote:
 
> > That's Great! I have a 256 meg 133mhz sodimm that is useless to me.
> > 133mhz will not work in my T21 thinkpad, only 100mhz.
 
> Other than a Compaq I've always been able to use faster RAM; it just
> runs at the slower speed. So if I had 128M PC2100 RAM and I buy a 256M
> PC3200 RAM then I still have 384M RAM but it all runs at the speed of
> the PC2100 RAM. But I would still buy the PC3200 just to look to the
> future. That way if I later buy a MB that takes PC3200 then I can use
> that on the new MB at the faster speed. So I wouldn't think the 133 Mhz
> SODIMM is useless. Unless the IBM TP is picky it should work at the 100
> Mhz speed. You'd still have the total RAM available.

Davey, that's the way it used to work, but Franklin's probably talking
about the way it works now. When you buy PC100 now it has chip density
compatible with the memory controllers when motherboards were made. It
was only later that memory controllers were improved to use chips with
higher density, and current and recently available new PC133 memory uses
only chips with the higher density. Modern high density PC133 installed
in an older system that doesn't understand it will either recognize half
of it, or none of it. Right now I have several Socket 7, Slot 1, &
socket 370 systems that could use more RAM, and 3 256M PC133 sticks that
won't work in any of them at more than 128M. Populating old systems with
more RAM now either costs a lot of money for premium priced low density
sticks, or a lot of effort finding good used low density sticks at
unscalped prices. Note that with used memory, just testing by popping it
into a system to see if the BIOS finds it all is not acceptable.
http://www.memtest86.com/ and your OS are both likely to find used RAM
so tested to be unacceptable.
-- 
"Love does not demand its own way."                1 Corinthians 13:5

 Team OS/2 ** Reg. Linux User #211409

Felix Miata  ***  http://members.ij.net/mrmazda/auth/




 
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