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data integrity / ecc question

M

modulus

Limp Gawd
Joined
Sep 20, 2010
Messages
360
I was wondering if anyone could shed a little light on unbuffered vs registered ecc memory.

So I've read up about how they both work and what the differences are as far as structure and stuff but I've been wondering if there is any difference in data integrity between the two types of ecc memory.


Are the error correcting abilities exactly the same between the two types? Does one type degrade faster than the other.

From my reading it seemed like registered might be superior? Also, I know this is a lame argument but intuitively, "unbuffered" just doesn't sound as safe as "registered".
 
I know this is a lame argument but intuitively, "unbuffered" just doesn't sound as safe as "registered".
Click to expand...

In most cases these are not compatible meaning a machine will either take registered ram or unbuffered ram. Remember that most servers will require registered ram and all desktops that I know off will require unbuffered ram. That is with few exceptions lga1155 xeons take ECC but require unbuffered ram.
 
drescherjm said:
In most cases these are not compatible meaning a machine will either take registered ram or unbuffered ram. Remember that most servers will require registered ram and all desktops that I know off will require unbuffered ram. That is with few exceptions lga1155 xeons take ECC but require unbuffered ram.
Click to expand...


Right, so I guess I'm at the point where I'm looking at putting together a new backup server and I was kind of thinking if one type of ECC (registered or unbuffered) was better I would just build with parts that could use that type of ECC memory.
 
You didn't read whatever you read correctly. Registered memory has nothing to do with ECC, you can get registered non ECC memory. Registered memory is memory destined to applications where a large amount of memory is used, and the usual memory controllers (in northbridges, and now in processors) would have trouble dealing with so many sticks/chips of RAM, so a register sits between the bus and the memory chips, and that helps.

So, what you need to do is decide how much memory you'll need, then find what kind of motherboard/CPU that would entice, and registered/unregistered will follow naturally.
 
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