A RIMM Question

[RayH]

I quite often read that four RIMM modules will run 35% faster than two. Does this mean:

4-128 MB modules will run faster than 2-256 MB modules; or

that doubling the number of modules will produce a 35% increase in performance, i.e.

4-128 MB modules will run 35% faster than 2-128 MB and that
4-256 MB modules will run 35% faster than 2-256 MB?

Thanks

[Jimstep]

I've never heard that before...There may be some delays referencing a larger grid in the large capacity modules. But would we be able to notice the difference. I guess if your an engineer, you would.

[psychomikeo]

I believe what happens using 4 rimm modules instead of 2 is
that since direct rambus memory can transfer data on both the rising and falling edges of a clock cycle,and if you use 4 128mb
mod's opposed to 2 -256mb mod's using the rimm's 16 bit bus you could transfer data faster via a 4lane highway than a two lane. I hope this was a acurate description and if i was way off
than pay me no mind!! lol hope i helped a little. mike..:cool:

[$1500-P4 gamer]

No, I wouldnt think it would be any faster running 4 instead of 2. The first thing you have to understand is that rdram is run in series. Now when talking about the P4 and rdram (I'm asumeing you are) this gets a little complicated. P4 is dual mem architecture meaning it runs two 16bit series circuits. So look at one branch. It has say one rimm in it. The next is the Crimm which is just signal traces to pass on the signal (its series). This compared to haveing ram in the second rimm is no dif. The ONLY way I can see it effecting it was if it had to do with the Northbridge chip but I doubt it. Tom's H and others would have noted it if it was true or even noticeable. Peace!:)

[RayH]

I had just heard the most effective method of using a P4 is to use four RAM modules.