With ram does the frequency matter at all?

Q: I bought some pc3200 for my computer 2gb in fact now only last week i bought some 512mb moduals and they worked fine but then i read that my computer can take up to 3gb of ram so i thought i'd try some of that! (as you do) Needless to say all hasnt gone well.... the only thing that i see as diffrent is the mhz the previose ram i got that works is 200mhz and the new stuff is 400mhz what have i done wrong?

A: hi mate ddr pc3200 ram actually works at 200mhz(http://en.wikipedia.org/wiki/DDR_SDRAM)however with the double data rate it will appear in some diagnostic utilitys as 400mhz(clock 200mhz x ddr effective = 400mhz frequency) since the installation of your memory has gone well theres nothing to worry about,however its good to see you are finding these issues,it shows that you are good at pc diagnostics and with time you could use this skill and knowledge in the I.T industry any problems let me know good luck mate !

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