Basic ram clock rate info needed....

[digitaldreams]

Thought I had my head round this !.

I have the QX6850....1333MHz FSB. Memory is Corsair 8000ul (1000 MHz).

Intel bus's are 'quad pumped' so the 1333 is actually clocked at 333.25 (moving data four times per each clock).

The ram is DDR (Dual Data Rate) so if running at 333 it actually outputs 666 giving me room for another 333 ??? (to reach the 8000ul's 1000).

My bios seems to report that I'm running the FSB/ram '1:1' (333>333)- sounds good, yet is there any advantage/sense in upping it to reach the 8000ul's 1000 rating ?

Any sense in what I have written ?....at all ? LOL

Regards

 

[digitaldreams]

Did what I wrote make sense ?, was it right ?.

I seem to have success running at 666 (5,4,4,9 timings @2.2v), would there be any advantage running at 999 with slower timings ?.

Regards

 

[digitaldreams]

1:1 (666) feels good yet I have proved the system benefits from higher...

666 Slack timings - 2728 MB/s (4,4,3,12)
666 Tight timings - 3258 MB/s (5,4,4,9)
999 Tight timings - 4343 MB/s (5,4,4,9)

The last one didn't last long before a freeze so will have to back off a bit. This is the spec of the ram yet I believe I can't reach that as I have four sticks in the machine (two would have been OK and not loaded the memory controller too much).

One day someone will explain how a 333 bus talking to DDR memory (hence 666) can run at 999 and be better when the processor bus speed is still 333 ?.

Regards

 

[digitaldreams]

Thanks...