CPUZ showing my 400mhz memory as running at 200mhz, help!

[natastna2]

Hi, I just bought 2 * 1 gigs of ddr2 pc2-3200 cl3 400mhz Micron off ebay and was just messing around with my computer in preperation for them to arrive when i downloaded a program called cpuz ehich shows you whether or not your memory is workingin dual chanel or not, I found out that my existing 4 sticks of ddr2 3200 400mhz ram are working in dual channel however it said that the max supported speed of each stick of ram was 200mhz. My question is, is this fine and this just means that each channel is running at 400mhz or is it a problem with the motherboard. Say if i had 2 600mhz ddr2 ram sticks running in dual channel woudl they show up in a program like cpuz as two 300mhz sticks. Thanks for your help in advance. Ant.

 

[eric54]

Lol. The Ram runs at 200mhz at Double the data rate. Hense, ddr-400 is actually clocked at 200 mhz times two. I have the same ram pc-3200 and I can promise you its running at its correct speed.

 

[natastna2]

Thanks alot man put my mind at rest.

 

[caskachan]

yah, it can be tricky at first, and even when considering overlcocks, the numbers can be messy and missleading if you forget about DDR (doble data rate)

yes your ram is running at 200 physical mhz, but beeing DDR memory well, its running at a logical speed of 400mhz

seeing that you mention them beeing ddr2 you could go and buy 600 ddr memories, but they could still run at 200(400ddr) and overclock the cpu, which for then the memories would have no problem reaching an overclock of 100mhz for the cpu bus . OR, no overclock and run the memory at 300mhz (600ddr)


cheers