Registered ram vs. Unregistered

fudgamfudgam Upstate New York
edited November 2003 in Hardware
The difference?

Comments

  • GnomeWizarddGnomeWizardd Member 4 Life Akron, PA Icrontian
    edited November 2003
    registered wontwork in my NF7-S!!!! LOL
  • fudgamfudgam Upstate New York
    edited November 2003
    I saw that lol. Thats why I was wondering.
  • muddocktormuddocktor
    edited November 2003
    Registered has .... registers on the stick.:D ;D

    Really, it does, my Corsair reg for my Asus dually has 3 little chips on the bottom of the stick of ram. I think it checks data integrity or something. I'm no expert though, maybe someone more conversant with this can explain it better.
  • ThraxThrax 🐌 Austin, TX Icrontian
    edited November 2003
    Registered memory is a type of buffered memory. When you have registered memory the memory board will have a chip called a register. The register clocks in and clocks out the data by the system clock. Registered modules are slightly slower then non-registered modules, because the registering process takes one clock cycle. Having registered memory improves data transfer by "re-driving" the control signals in the memory chips.
  • croc_croc_ New
    edited November 2003
    Yeah, its a form of error checking, and it hinders performance (I have heard, and only slightly) compatability will vary from board to board. I am no expert either, so ... experts where are you?

    edit: doh, ok. thrax hi, I am slow.
  • drasnordrasnor Starship Operator Hawthorne, CA Icrontian
    edited November 2003
    Typically, registered modules also have ECC (Error-Checking & Correction), but not necessarily. ECC keeps parity information on all the stuff in your RAM, so it can detect and correct errors as they occur. That uses up some performance also, but on my dual MP board it's necessary to get it to boot.

    -drasnor :fold:
  • fudgamfudgam Upstate New York
    edited November 2003
    This might be a noob question.....
    What errors would occur in a stick of ram?
    And if you were using a system with registered ram and a system w/o, would you say "this one must have registered ram/this one must not have registered ram"?
  • ThraxThrax 🐌 Austin, TX Icrontian
    edited November 2003
    There could be a glitch in data, quite simply. The memory could access something incorrectly, or attempt to feed bad data, a memory error could screw everything up.

    And yes, that is what you would say.

    For example:

    Athlon 64 FX-51 and Opteron chips REQUIRE registered memory.

    Athlons don't, but the motherboards might.
  • fudgamfudgam Upstate New York
    edited November 2003
    aaaaaahhhh
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