What is the meaning of FSB:DRAM?

本帖最後由 kenn 於 2010-8-6 23:56 編輯

I find from CPU-Z that there is a reading of FSB:DRAM.  My set of Rams showed a reading of DRAM frequwncy of 850 MHz and FSB:DRAM @2:10 and CL7-8-7-20-88-2T.  But I find from the this forum that sometimes the test reports from other C-Hings that their readings of the FSB:DRAM ratio is 2:8 for DDR3, and some got a reading of 1:2 or 1:1 for DDR2.  So what is the meaning of the readings?  Which ratio is better?  

Thanks in advance.

回復 1# kenn
fsb係成部機的頻率
之後x倍頻 成為每樣野的頻率
同fsb下 倍頻愈大就會愈快

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In my case, the FSB is 170 MHz and my RAMs are running @1700 MHz.  Then the FSB:DRAM should be 1:10, but the CPU-Z shows the ratio to be 2:10.  Why?

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回復 3# kenn
ddr sdram的頻率係真實的2倍
因為2倍傳輸速度
170/2*10=850
ddr sdram再x2
850x2=1700

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回復 4# kwokhokay

Thanks for your reply.

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回復 1# kenn

those who use DDR2 will usually get a reading of 1:1 (or close to 1:1 such as 5:6 or 4:5) because previous intel CPUs (core 2, which may use DDR2 memory) rely on ordinary quad-pumped FSB architecture (instead of DMI or QPI used on i5 or i7 processors) which runs on higher bus frequency

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回復  kenn
fsb係成部機的頻率
之後x倍頻 成為每樣野的頻率

同fsb下 倍頻愈大就會愈快 ...
kwokhokay 發表於 2010-8-7 00:04

成部機???
每樣野???
ching搞錯了吧...

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