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Installing memory of different speeds

  • Memory
Last response: in Memory
May 29, 2006 11:52:42 AM


I have a Biostar - TForce 6100-939 (with an AMD 4000+). The MoBo has 4 RAM slots. I previously had 2 1gig PC3200s and just received 2 1gig PC2100s (received from a cmoputer that was being scrapped). As the memory chips are of different speeds, what is the best placement for the 4 chips in the 4 slots (DIMMA1, A2, B1, B2)? Is it even worth installing the second two, slower chips?


More about : installing memory speeds

May 29, 2006 12:59:21 PM

well pc 2100 is actualy DDR266 so that will make your DDR400(PC3200) work at 266 and at the slowest laciency...(excuse my spelling)

edit: one more thing: youer comand rate now is 1T...adding 2 more GB will make your command rate 2T (worse)
a b } Memory
May 29, 2006 1:09:46 PM

When memory of different speeds is installed, memory speed and timings will be set to what ever the slowest memory can run at.
If you already have 2 gig of memory, installing more memory, even more PC3200 is not going to make any noticable difference. Installing slower memory will most likely cause a noticable decrease in performance. Some boards may not like the mixed modules and not even boot. In short, I would not install them.
If on the other hand you only had say 512 meg and were adding another 512 meg, then I would say give it shot. The added memory would be beneficial even though it would be running slower.
May 29, 2006 1:34:54 PM

If you have 2Gb don't intall more. Windows can use only 2Gb per process.

You only use more RAM in multitasking and your computer will be slower