View Full Version : Identifying installed SDRAM speed.
09-04-2000, 03:28 AM
Is there a program that will tell me the speed of the RAM I have installed, ie 66MHz/100MHz/133Mhz ?? I've tried Sandra but it does tell me exactly.
The reason I want to know is I wish to upgrade my memory by throwing in another DIMM. They DO have to be the same speed correct?
If memory serves me correct, the 66/100/133 Mhz speeds you are referring to are only for the I/O buss (PCI cards and such) and not the memory itself. Memory tends to be on its on buss and the chips have their own speed ratings such as 50, 60 or 70ns (nanoseconds). You can *usually* mix chips with different speed ratings, but your system will adjust the memory speed to the slowest speed rating for all chips. A 10 or 20ns difference in speed would usually go unnoticed unless you are doing some heavy duty computing or gaming. So if the chip fits, try it, you won't break anything unless you try to do it while the system is still running :-)
09-11-2000, 11:15 AM
Basically, yes, your memory should be the same speed, ie 66MHz, 100MHz etc. The access time can be mixed, but is not highly advisable. That's the 50, 60 or 70ns mentioned above. You should try and put the faster chip(s) in the first slot(s).
PC 100 & PC 133 RAM will both operate at slower speeds, the speed rating is simply the maximum at which they will run. You won't get full performance at the slower speed, obviously.
Kingston (http://www.kingston.com/tools/bits/bit21.asp) has a good site related to memory in general you might find useful, but I can't find a site with an application that identifies your memory offhand. I know they exist though, try using some of the search engines and looking for memory related links. I don't have time to do it right now, but will check back later and see what I can dig up.
I think Win Tune (http://www.hol.gr/clubs/windows/wintune.htm) will tell you which memory your computer is using, but I'm not certain. If not, it's still a very good utility to have lying around...
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