mem upgrade-- XP slows down ?

[Pieter Cramwinckel]

After a memory upgrade (in the 1st slot was 256 mb, in the second added
512mb), the bios recognized immedieately the upgrade correcly, but to my
surprise win XP pro was very very very slow slow .
I then took out the original 256 mb in slot 1 and left the 512mb in its
second slot , and win XP runs normaly (recognizes 480 mb).
Both memroy sticks were "nobrand" same type PC 2700 same 333Mghz speed.
Why is windows XP so slow when the 2 were installed, and how to install it
again correctly ?.

 

[Yves Leclerc]

Some motherboards have a nasty memory requirement. I have since that the
largest RAM module must be placed in the first memory slot, if two modules
are to be used.

Also, you could be the "victim" of a counterfeit memory module (since both
are noname). Counterfeiters take slow RAM and re-label them as higher
speed.

Y.

 

[anonymous]

You can download the free programs from
www.belarc.com
http://www.aida32.hu/aida32.php
which will scan your computer and return a report to you
what your computers full specs are (you'll be amazed).

 

[Jeff Van West]

Memory incompatibility can also cause this problem, such as using ECC and
non-ECC memory on the same board. I've seen so many memory compatibility
problems that I only buy memory from crucial.com now. They guarantee it will
work. It's more expensive, but it just isn't worth the hassle.

 

[Alex Nichol]

After a memory upgrade (in the 1st slot was 256 mb, in the second added
512mb), the bios recognized immedieately the upgrade correcly, but to my
surprise win XP pro was very very very slow slow .
I then took out the original 256 mb in slot 1 and left the 512mb in its
second slot , and win XP runs normaly (recognizes 480 mb).
Both memroy sticks were "nobrand" same type PC 2700 same 333Mghz speed.
Why is windows XP so slow when the 2 were installed, and how to install it
again correctly ?.

Probably they were not adequately matched. Windows is *very* fussy on
the point