BuckingFastard
Baseband Member
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- 73
I've been looking around on Google and I can't seem to get a straight answer on this. Also its entirely possible that I'm wrong on my assumptions, so please feel free to correct me.
DDR frequencies run at half the DDR rating. For example, DDR-400 runs at 200MHz, DDR-533 runs at 266MHz.
The FSB rating is equal to 4 times the actual FSB. For example, FSB800 actually runs at 200MHz, FSB533 actually runs at 133MHz.
If the above is correct, what would be the frequency of say, DDR2-533 or DDR2-667? I've heard that the actual frequency can be obtained by dividing the DDR2 rating by 4. So for example, DDR2-533 actually runs at 133MHz, and DDR2-667 actually runs at 166MHz. I've also heard that DDR2-533 runs at 533MHz, and DDR2-667 actually runs at 667MHz. Can someone please clarify this for me?
The reason I ask is because I'm building a new system soon and I want the FSB to match the memory frequency. I'm not exactly sure how to go about this. If I have an FSB of 800MHz, should I have 4 sticks of DDR400 since each is 200MHz? Or does it not matter because FSB800 is actually 200MHz and so is DDR400?
What effect, if any, does dual channel have on this?
DDR frequencies run at half the DDR rating. For example, DDR-400 runs at 200MHz, DDR-533 runs at 266MHz.
The FSB rating is equal to 4 times the actual FSB. For example, FSB800 actually runs at 200MHz, FSB533 actually runs at 133MHz.
If the above is correct, what would be the frequency of say, DDR2-533 or DDR2-667? I've heard that the actual frequency can be obtained by dividing the DDR2 rating by 4. So for example, DDR2-533 actually runs at 133MHz, and DDR2-667 actually runs at 166MHz. I've also heard that DDR2-533 runs at 533MHz, and DDR2-667 actually runs at 667MHz. Can someone please clarify this for me?
The reason I ask is because I'm building a new system soon and I want the FSB to match the memory frequency. I'm not exactly sure how to go about this. If I have an FSB of 800MHz, should I have 4 sticks of DDR400 since each is 200MHz? Or does it not matter because FSB800 is actually 200MHz and so is DDR400?
What effect, if any, does dual channel have on this?