A little off topic here, but it's good news for Intel, which'll be using DDR2-533 as a performance solution in grantsdale paired with 1066Mhz FSB:
Kingston is <A HREF="http://www.vr-zone.com/?i=685" target="_new">currently working on</A> a low-latency DDR2-533 variant. Now while the normal DDR2-533 has 4-4-4 latencies - which is equivalent to an abolute access delay that is equal to DDR1-400 at 3-3-3 - this new variant has 3-3-3 timings!
Given that Intel still has time until June, doesn't it seem possible that some memory manufacturers might actually break JEDEC's standard and go beyond? I mean, JEDEC was very conservative and shy about DDR400, but it's mainstream now with excellent latencies. Noone expected the latencies to show such great numbers in DDR400 - it was expected that DDR2 would be needed to overcome the limitations of DDR1 and that DDR-400 would only be a niche product. Everyone was worried that dual DDR-400 wasn't a good idea.
Which brings us to the point: it seems likely that latencies are an issue that will be cleared out. DDR2-533@4-4-4 is almost commonplace now, and the memory manufacturers still have almost 2 months to improve techniques. Remember DDR400 and their problems with timings like 3-3-3? And with Intel fueling Infineon's research, well... I don't think DDR2 will be such a disappointment at start (more so if it indeed starts at DDR2-533 or DDR2-667 in June). Intel always gives the memory industry a hard time - which is good for us.
<i><font color=red>You never change the existing reality by fighting it. Instead, create a new model that makes the old one obsolete</font color=red> - Buckminster Fuller </i>
Kingston is <A HREF="http://www.vr-zone.com/?i=685" target="_new">currently working on</A> a low-latency DDR2-533 variant. Now while the normal DDR2-533 has 4-4-4 latencies - which is equivalent to an abolute access delay that is equal to DDR1-400 at 3-3-3 - this new variant has 3-3-3 timings!
Given that Intel still has time until June, doesn't it seem possible that some memory manufacturers might actually break JEDEC's standard and go beyond? I mean, JEDEC was very conservative and shy about DDR400, but it's mainstream now with excellent latencies. Noone expected the latencies to show such great numbers in DDR400 - it was expected that DDR2 would be needed to overcome the limitations of DDR1 and that DDR-400 would only be a niche product. Everyone was worried that dual DDR-400 wasn't a good idea.
Which brings us to the point: it seems likely that latencies are an issue that will be cleared out. DDR2-533@4-4-4 is almost commonplace now, and the memory manufacturers still have almost 2 months to improve techniques. Remember DDR400 and their problems with timings like 3-3-3? And with Intel fueling Infineon's research, well... I don't think DDR2 will be such a disappointment at start (more so if it indeed starts at DDR2-533 or DDR2-667 in June). Intel always gives the memory industry a hard time - which is good for us.
<i><font color=red>You never change the existing reality by fighting it. Instead, create a new model that makes the old one obsolete</font color=red> - Buckminster Fuller </i>