Registered / Buffered

[Tranced_abx]

Both way's of delaying the data to relieve the memorycontroller...

I've read a lot of Faq's about it but the difference still puzzles me

I'm planing for a upgrade to the ASUS A7M266-D with the AMD MPX760 supporting unbuffered (up-to2GB) and ECC (up-to 4GB) dunno what to get....

are the ECC's automaticly buffered or registered or....

[k0NG0]

I found a good explanation on the differences. It's basically the same thing, but buffered memory has the buffer incorporated on the module itself and with registered memory, the buffers are incorporated in the memory controller and usually situated on the mobo.

http://www.kingston.com/tools/bits/bit27.asp

Oh, and I poked together a little avatar for you. I read that you wanted something like this in another thread, and posted it there, but I guess you haven't seen it, or didn't like it.



I can fix the color if you want me to.

-kONGO

[k0NG0]

Oh, and ECC is not automatically buffered/registered, you need to specify that you want a special flavor for ECC memory also. I would think it's easier to get buffered/registered ECC memory though, since it's geared towards servers that tend to use those memory-types.

-kONGO

[Tranced_abx]

Woo, love the avatar

I think I'll just go for the unbuffered/unregistered DDR, price for the ECC stuph is a bit to high 4 me and not really neccesary.

[k0NG0]

Glad you liked it. Use it, by all means. If you'd like a different color, just tell me and I'll fix it in no time.

-kONGO

[Tranced_abx]

Originally posted by kONGO
Glad you liked it. Use it, by all means. If you'd like a different color, just tell me and I'll fix it in no time.

-kONGO

Blue is perfect because lot's of forums use white or black backgrounds...

btw. I didn't see your other post with the avatar... ain't got much time for browsing the boards lately

[k0NG0]

It'll probably look quite bad on dark backgrounds as I chose white as the matte-color. You'll probably see a white edge around it unfortunately.

Too bad we can't use PNG's as avatars, the 8-bit alpha-channel would rock...

-kONGO

[k0NG0]

I've fixed avatars with grey matte-colors that are 0%, 25%, 50%, 75% and 100% in luminance. That way you can choose one that fits best on the forum you want it. I've enclosed a zip-file with the 5 different ones here. Enjoy.

-kONGO

[Tranced_abx]

Nice

but we're drifting a wee-bit off topic here...

[k0NG0]

Hehe...I tend to ramble a bit, as you may know.

Returning to the subject, I don't really think that the register/buffer/whatever is there to relieve the memory controller. I think it has more to do with sending all bits at exactly the same time, to make the risk of data misalignment and timing problems as small as possible.

-kONGO

[Tranced_abx]

Originally posted by kONGO
Hehe...I tend to ramble a bit, as you may know.

Returning to the subject, I don't really think that the register/buffer/whatever is there to relieve the memory controller. I think it has more to do with sending all bits at exactly the same time, to make the risk of data misalignment and timing problems as small as possible.....

-kONGO

....with more RAM (above 2GB) and thus relieving the Memory controller-> it's doesn't have to be exact, a bit of timing doesn't matter anymore because of the buffer



did some Gif Animation.... Needs some retouching.... but the still 25% image works just fine on black background

[k0NG0]

I found this:

Q: What's the difference between buffered and unbuffered DIMMs?

A: High density DIMMs have lots of chips on them and therefore possess a higher capacitive load on the address and control signals in comparison to lower density DIMMs. Some designers use re-drive buffers on the DIMM to boost the signals to reduce system loading when compared to the same high density module without buffers. But, the buffers introduce a small delay into the electrical signal, so adding buffers to a standard density module would have the effect of slowing down the signal, compared to the same low density module without buffers.


Q: What is Registered SDRAM ?

A: The term "registered" refers to how the memory module processes signals.

Registered modules contain a register that delays all information transferred to the module by one clock cycle.

This type of memory is primarily used in servers and was designed for modules with 32 or more chips on them to help ensure that data is properly handled.

While most PCs will only accept unbuffered SDRAM, there are some that accept registered SDRAM. Keep in mind that when you install registered SDRAM, all of the modules installed in your PC must be registered because unbuffered and registered modules are not interchangeable.

http://www.simmtester.com/page/memory/show_memfaq_cat.asp

-kONGO