FSB:DRAM speeds?

I know this has been asked many times but I still can't seem to figure it out.

PC5400 memory is 333mhz. Now can this memory run at 666mhz when used in a dual channel configuration without altering its base latency?

And, can this same memory run at 333mhz in a dual channel configuration with its base latency CAS reduced from say 5 to 2.5?

Specifically, CPUZ reports on a p4 940 3.2ghz:

Core: 4159 mhz
Multi: x16
Bus: 260 mhz
FSB: 1040 mhz

Memory

Freq: 433
FSBRAM 3:5

Is it ok for my memory frequency (433mhz) to be above the maximum allowed (333mhz) even though the FSB is 1040mhz?

orion456 said:

I know this has been asked many times but I still can't seem to figure it out.

PC5400 memory is 333mhz. Now can this memory run at 666mhz when used in a dual channel configuration without altering its base latency?

And, can this same memory run at 333mhz in a dual channel configuration with its base latency CAS reduced from say 5 to 2.5?

Specifically, CPUZ reports on a p4 940 3.2ghz:

Core: 4159 mhz
Multi: x16
Bus: 260 mhz
FSB: 1040 mhz

Memory

Freq: 433
FSBRAM 3:5

Is it ok for my memory frequency (433mhz) to be above the maximum allowed (333mhz) even though the FSB is 1040mhz?

Click to expand...

Should have been in the Memory forum, but I'll bite.

It's a weird multi, but if it's stable... basically you have overclocked your memory to 866GHz (DDR means dual data rate, so it's 433x2). That's +200MHz and that's quite good.

Dual channel doesn't boosts the speed itself of the memory, it's simply that both memories are used at the same time. So, the effect is larger bandwidth. Latency loss for memory is barely noticeable. So, no, you can't get your DDR2 to get to 666MHz with it being dual channel. DDR2-1333 is quite hard to get, too, and you'd need a 1333FSB to hit it. Good luck on a PenD.