can anyone please explain

[GJ02]

m a little confused as to how my memory is setup
i currently have 4 gig of ocz pc2 8500 certified to run @ 1066
now
am i right in saying that your memory runs at whatever your fsb is set to ?
my e8500 is clocked @ 4.0 with the fsb @ 421 @ 9.5 multi
on cpuz my memory is @ 526.3 @ 4:5 fsb to dram
if i i leave my fsb @ 333 standard i will get 1066 on the mem, then when the fsb is increased the mem freq increases too. am i right in saying that i need to set my mem freq at a happy medium closest to 1066 ? that being 526.3mhz x 2 =1052.6 that being close to 1066

have i grasped this correctly or have i completely missed it ?
im about to add another 4 gigs tomorrow

any help / advise / making my understanding of this would be very very much appreciated

thanks

 

[JonJ678]

You've nearly got it. Memory runs at whatever its asked to, if it can. The fsb to ram ratio behaves as expected, which means only a few fsb choices will get you exactly 1066mhz. Of course, ram will run faster than specified in the same way as cpus if asked. Take care with overvolting it however.


What I fear you've missed is that it is more difficult for the motherboard to run four sticks than two. This is likely to mean more northbridge voltage, possibly coupled with higher ram voltage. It may also mean you end up running 1:1 rather than 4:5.

I hope that was comprehensive, always interested to see people running basically the same system I am

 

[GJ02]

well i put the other 2 sticks of ocz in so now 8 gig in total
booted first time and cpu fsb is @ 421 with a 9.5 multi
ram frequency is @ 526.3 with fsb dram 5.4

put it down to 1:1 till i figure out how this all works

 

[JonJ678]

Ah so this is where your thread was. It looks like things may have worked out well for you. If the overclock is still stable after moving to four sticks of ram I'm very happy for you. I would recommend retesting, I'd personally suggest prime blend since thats crashing very quickly for my P5Q while small fft runs indefinitely.

I can't really explain the arguments for running the ram faster than the fsb I'm afraid. The word bandwidth gets said quite a lot and people nod approvingly. I think that running 1:1 with the tightests timings you can keep stable is the best call, as I suspect that this is best for raw calculation and that higher ratios are more important for gaming.

If it's not stable, I think your northbridge volts are going up or the fsb is coming down. The higher processor multiplier (relative to my one of 8.5) should help keep the clock speeds high, I think youre going to do well. Do let us know how it goes