Interleaved Ram?

[arib0nd]

What exactly is interleaved Ram? and how is it different from non-interleaved Ram?

I found a guy selling me 256 MB PC 133 DIM for pretty cheap, but he told me that it didn't work in his machine since his motherboard needs interleaved Ram and thus needs high quality registered DIMMS. The DIMM he is selling me is some Generic one..

Any ideas?

Thanks
Ari

 

[Vrangel]

Well, interleaving is done by mobo chipset.Its not something RAM has in itself.
When its enabled on your system RAM will become interleaved as soon as you plug it in.

Registered RAM is different. It has ... registers.It is used for systems with large amount of memory chips.
Like when you have 1GB of memory or more.Not that its superior, just the chipset cant handle that many chips otherwise.

The guy you are talking about doesnt sound very convincing.

 

[medic]

interleaved memory
Main memory divided into two or more sections. The CPU can access alternate sections immediately, without waiting for memory to catch up (through wait states). Interleaved memory is one technique for compensating for the relatively slow speed of dynamic RAM (DRAM). Other techniques include page-mode memory and memory caches.
Good info here:
The Pentium processor can handle data far faster than many memory systems can supply it. When that happens, the processor sits idle, which is a waste of a powerful resource. That's why it's critical to have a memory subsystem (RAM, adequate second-level write-back cache, and wide processor-to-memory bus) that can keep up with the data processing capabilities of the Pentium processor. Well-designed memory systems can increase the flow of data in several ways. One key method is interleaved RAM subsystems. These are dual banks of memory that work together to supply data to the processor so it doesn't sit waiting. One bank provides data while the other prepares data for the next cycle; on the next request, they alternate roles.