I'm trying to scope out components for a new PC, and I'm kinda confused by the array of options surrounding memory. Specifically, is there any speed advantage to be gained from matching front side bus speed with memory speed? Say, if I got PC3200 DDR RAM (PC3200 = 400MHz). Would I be better off getting a P4 with a 400 MHz front side bus to "match" the RAM? Would the extra bandwidth of a CPU with 533 MHz FSB be "wasted" waiting for memory? Or am I totally out of whack here? And if that's true, then what about the commonly used pairing of a 533 MHz FSB CPU with 266 Mhz DDR RAM? Does that just totally suck?
My question arises from this cryptic statement from Corsairmicro.com:
"The latest chip sets have demonstrated that performance is greatest when the memory bus runs at an integral multiple of the front side bus of the processor. So, the optimum memory performance is attained when the memory bus is synchronous with the processor, and latency settings are reduced to the lowest values possible."
An "integral multiplier"? So, if 533 * 2 = 1066, is it massively better to get 1066 RDRAMs instead?
Also, I notice that (at least on newegg.com)
P4 2.6 GHz 400 MHz FSB Retail = $236
P4 2.66 GHz 533 MHz FSB Retail = $225
Why would that be, if faster was necessarily better? Maybe there's some kind of formula taking processor FSB, memory, and CAS latency into account. Maybe faster is just better, and that's all there is to it. Maybe none of this matters 'cause the CPUs have fat 512K L2 cache and that removes most of the penalty of slow memory. Maybe I should seek treatment for obsessive compulsive disorder.
Please help me figure this out. Thanks.
My question arises from this cryptic statement from Corsairmicro.com:
"The latest chip sets have demonstrated that performance is greatest when the memory bus runs at an integral multiple of the front side bus of the processor. So, the optimum memory performance is attained when the memory bus is synchronous with the processor, and latency settings are reduced to the lowest values possible."
An "integral multiplier"? So, if 533 * 2 = 1066, is it massively better to get 1066 RDRAMs instead?
Also, I notice that (at least on newegg.com)
P4 2.6 GHz 400 MHz FSB Retail = $236
P4 2.66 GHz 533 MHz FSB Retail = $225
Why would that be, if faster was necessarily better? Maybe there's some kind of formula taking processor FSB, memory, and CAS latency into account. Maybe faster is just better, and that's all there is to it. Maybe none of this matters 'cause the CPUs have fat 512K L2 cache and that removes most of the penalty of slow memory. Maybe I should seek treatment for obsessive compulsive disorder.
Please help me figure this out. Thanks.