Forum Home
Press F1
 
Thread ID: 44126 2004-04-08 01:39:00 what is the difference between registered and unbuffered memory modules mikeymike76 (4408) Press F1
Post ID Timestamp Content User
227970 2004-04-08 01:39:00 I am wanting to put some more ram in my computer the kingston site says that I can put any configuration of these but they have to one or the other, how do I tell the difference? is there a way in windows to find this out? mikeymike76 (4408)
227971 2004-04-08 05:27:00 I don't know the answer to your question but until someone can help you check out this page (homepages.inspire.net.nz) which could possibly have the answer somewhere, either on that page or in one of the links. :-) Susan B (19)
227972 2004-04-08 06:18:00 Hey mikeymike76,

Difference between registered and unbuffered memory would be price.

Well it should be but that's not the difference, registered is ECC RAM (error correcting code), which is used on servers where being proned to errors is a must, it also costs more than NON-ECC RAM. This is reliable RAM which is why it's used mainly on server-type computers, it has an extra chip (or circuitry) which checks the accuracy of data as it passes in and out of memory.

Unbuffered or NON-ECC RAM is the opposite, it doesn't have the extra chip for checking the accuracy of the data.

You need to check your motherboard manual whether you support ECC RAM, I don't believe you can mix NON-ECC with ECC. Chances are you use NON-ECC just because of cost and not every user has a server.


Noel Nosivad
Noel Nosivad (389)
227973 2004-04-08 08:37:00 Try Aida32 it will tell you all you want to know about the guts of your PC but I gather they are discontinuing it. mikebartnz (21)
227974 2004-04-08 08:47:00 registered ram and ecc are 2 different things.

registered ram uses a register chip on the ram stick to write data to the ram rather than having the pc chipset write directly to the ram. with some pc's registered ram is needed to be able to get the max amount of ram to be installed, eg a motherboard may max out at 1 gig ram but with registered ram it will max out at 2 gig.
tweak'e (174)
227975 2004-04-09 00:58:00 The most important difference between registered RAM and non-registered RAM is that the registered RAM has dual power rails, one is dedicated to the bus interface and the other to the DRAM management.

Unbuffered RAM means that when the CPU writes to the RAM it has to wait for the write cycle to complete before it can write more.
With buffered RAM the writes can be "cued" to allow, in theory, faster writes.
ugh1 (4204)
1