ECC Registered

[Qnote]

Is there anyone who can help me find out why an ECC Registered RAM is more expensive?

[seoguyz]

Sorry, cant help you personally, but just felt I had to post to make sure you didnt think you were being ignored :P

[Administrator]

I don't know anything but i googled it for you :)



What does ECC and Registered mean?

The AthlonFX does not require ECC (Error Checking & Control) RAM, rather it does require registered RAM. As it happens, most registered RAM tends to be ECC, as with this sample from Crucial.

ECC was basically created for stability reasons, after Parity RAM was the norm. Parity RAM added a bit to each Byte, for the purposes of validating the Byte it has attached itself to. ECC on the other hand not only checks the Bytes, it also has an extra bit to correct most errors, where Parity RAM would generally halt the system before further errors could occur. ECC does incur a slight performance hit, and due to the fact most RAM today rarely produce errors, unless you need ECC, don't bother with it.

Registered RAM contains a "register" to aid in ensuring the data is being handled correctly, delaying all data from being transferred to the module for one clock cycle. The registers re-drives the signal throughout the memory chips which in turn allows for each module to be built with more memory chips, a plus for systems which require registered memory for sure.

As you can see, both features are geared towards stability rather than performance, and while the Opteron and FX51 are certainly high performers in the CPU market, the RAM required for use with both, like the Crucial RAM in today's review, is not high performance itself.

Text taken from here: http://www.hardavenue.com/reviews/crucialpc2700reg1.shtml

[Qnote]

Okay thats nice too know. Nice info Haydn.

Chukun:
Thanks. that's what is so nice about CMforums.