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667MHx memory only running at 333MHz

post #1 of 5
8/6/07 at 8:34pm
Thread Starter 
I installed 2X2 gb PC2 5300 667MHz of Patriot memory model PSD22G6672S SODIMM CL5 in my 1710 but when I run cpu-z-140 it says it is 333MHz, am I missing something. Another thing my frinds 1710 has 2gb of factory memory and his Vista Windows Experiance score is 4.9 with 2 gb and mine is 4.7 with 3.326 gb. Whats up with that?????
Thanks,
LeeU
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post #2 of 5
8/6/07 at 8:37pm
I could be wrong but because all memory is DDR (double data rate) these days, the effective frequency is 2x the actual frequency. So the actual frequency for DDR-667 is 333Mhz, while 667Mhz is the effective frequency.

http://en.wikipedia.org/wiki/DDR_SDRAM
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post #3 of 5
8/6/07 at 9:34pm
Yes that is correct. They are running in dual channel. 2 x 333mhz = ~667mhz
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post #4 of 5
8/6/07 at 9:57pm
Yeah its DDR. Anyway, dont put too much behind the vista scores. Its just a MS implementation, not any definitive benchmark. Take me for instance. I dont use vista so the index means nothing to me. I like the way my system performs in other OS'es and I dont think its performance will scale poorer in vista just because a (dare I say) silly index score.
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post #5 of 5
8/6/07 at 10:05pm
Thread Starter 
Thanks folks, I feel like an idiot now as I knew they where DDR2.
Thanks,
lee
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