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Problems with Memory Upgrade...


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Hello there...


I have in my system 2 gb XMS2 6400 800mhz CL5... 2x1024...( Default set up in BIOS, never OC )


I want to buy a 4 gb XMS2 6400 800mhz CL5,... 2x2048.


BUT... Here is the situation...


The old memory have 5-5-5-12 Latency


And now all the new memories in the market haves 5-5-5-18 Latency...


Exists any problem if i mix the memories in my system ? i mean... the latency is different in the modules, but the frecuency is the same.


Please Help. I don't know what to do.:confused:


Thank You so much for read my post.

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For future reference, it is never advisable nor is it supported to mix different module version ICs. Look at your modules. What versions are they?


Please research this thread regarding running with a four DRAM slot population. Please take your time to study this thread.




Post any questions you have that this thread does not address. You can also check with any other forums for additional information if you wish more information or more opinions.


Some of the forums you can check are:





As well, just look on this site or any other DRAM memory site and you will see many, many posts of people attempting to make their systems stable with all four DRAM slots filled. Check other manufacturers help forums to see that this issue is regardless of manufacture of the DRAM since the issue is the memory controller.







Download memtest from--->

and extract the ISO image. Burn the ISO image to an CD-ROM disk.


Drop the DRAM speed from 800Mhz to 667Mhz and raise the MCP/SPP +.2v and test with Memtest for two full passes.

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