CODEWITHSUNDEEP
hardwarecomputer-sciencelatencycpu-architecture
user1462294
user1462294

Reputation: 167

How do I calculate memory system latency (access time)?

I've been searching for some type of equation or explanation of how to find the latency (access time) of a memory system when given the bandwidth, the precharge (refreshing) time between accesses, and how many bytes of data are being transferred.

Also I am not sure as to how memory interleaving would change this latency.

I was able to find this latency formula: 

latency = seek time + rotational delay + transfer time + controller delay

but apparently it's applies to hard drives, not system memory. Is there a formula for the latency of a system memory/what is it?

Upvotes: 1

Views: 5305

Answers (1)

bomber8013
bomber8013

Reputation: 46

I'm on my cell phone, so it isn't easy to directly reference, but I think that the Wikipedia article on bandwidth has some good smidgens of knowledge.

From what I understand, bandwidth is along the lines of bandwidth = frequency / latency x data rate x bus width. Maybe that'll help.

Upvotes: 2

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