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Thread: Will pc6400 work in place of pc3200

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    Will pc6400 work in place of pc3200

    Hi all,

    I just Bought 4gig of memory, Corsair DDR2 Twin2X Pc6400 800mhz, 2 packs of 2 gig.
    And Was told i can use it in place of my old memory in 2 of my machines.
    So my machines are... Abit IC7-G Running 512k pc3200 400mhz,
    And.. an Asrock 939 SLI - eSAT2 Also Running 512k pc3200 400mhz.

    Is this just a standard upgrade ie just stick it in - or will i need to do anything with the bios`s ect.

    Any advice welcome, links ect - many thanks.

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    Senior Member chrestomanci's Avatar
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    Re: Will pc6400 work in place of pc3200

    Won't work.

    PC6400 will be DDR-2, the PC3200 will be DDR. They are mechanically and electrically incompatible.

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    Re: Will pc6400 work in place of pc3200

    what he said ^^^^^^^^^^^^

    divided by two

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    Re: Will pc6400 work in place of pc3200

    Quote Originally Posted by aidanjt View Post
    A large root will do ok

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    Re: Will pc6400 work in place of pc3200

    I am sure you have a brand new computer now since this was 5 years ago but this is for anyone else that comes across this same question.

    Yes you CAN use PC6400 on a pc that only supports PC3200. If it is an older computer, which it is, you can only use 1GB DDR RAM sticks and cannot use a 2GB DDR PC3200 or PC6400. As long as it is a DDR 400MhZ PC3200+ then you are fine. I have a 15 year old EVGA mobo that is DDR 400MhZ PC3200 only which has DDR PC6400 in it, just couldn't do a 2GB stick, only one.

    My resource for this info is me, Level 3 Computer Technician for CyberDefender (MyCleanPC, MaxMySpeed)
    Last edited by Yellowbeard; 03-06-2012 at 12:02 AM. Reason: Insulting other members.

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    Re: Will pc6400 work in place of pc3200

    Quote Originally Posted by chrestomanci View Post
    Won't work.

    PC6400 will be DDR-2, the PC3200 will be DDR. They are mechanically and electrically incompatible.
    FYI, I have an Emachines that I am using right now to post this that has DDR (NOT DDR-2) that is PC6400!
    Last edited by Yellowbeard; 03-06-2012 at 12:11 AM.

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    Re: Will pc6400 work in place of pc3200

    marz, first of all you are commingling terminology. Second, you are wrong. Third, it's against the forum rules to insult other members here. Your posts have been edited.

    In the context of this thread, the original answers are correct for the motherboards listed in the first post. There is no DDR1 memory (184 pin DDR) made that is PC6400. The fastest I recall made in 184 pin DDR1 was PC4400 or DDR533 or possibly PC4500 aka DDR566 or so. No DDR ever got close to PC6400 speeds aka DDR800.

    The only manufactured PC6400 memory is DDR2, 240 pin and as noted above:

    Quote Originally Posted by chrestomanci View Post
    Won't work.

    PC6400 will be DDR-2, the PC3200 will be DDR. They are mechanically and electrically incompatible.
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    Re: Will pc6400 work in place of pc3200

    Only thing I would add is that a number of Intel P4 based systems did, for a time at least, use DDR2-3200, which may be the source of the confusion.
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    Moderator Yellowbeard's Avatar
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    Re: Will pc6400 work in place of pc3200

    Quote Originally Posted by dave87 View Post
    Only thing I would add is that a number of Intel P4 based systems did, for a time at least, use DDR2-3200, which may be the source of the confusion.
    Very true, good point. IIRC, most of them were OEM type systems. I don't recall any enthusiast boards with anything lower than DDR2-533.
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    Re: Will pc6400 work in place of pc3200

    ^ A lot of Dell systems (mainly S775 Pentium 4's) came with DDR2-400 (PC2-3200) or DDR2-533 (PC2-4200) from the factory back then. I remember dumping a lot of those sticks into the garbage because they were ridiculously small (128-256MB per stick) and useless for basically anything except geeky decoration lol

    Many old chipsets like the Intel i910-i945 series don't even support running the RAM any faster than DDR2-533.
    And there were quite a few Core2 compatible i945 boards.. Highly doubt those ended up in high-end systems though

    The thought of having a Core 2 Quad on a i945 board alone..

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    Re: Will pc6400 work in place of pc3200

    Quote Originally Posted by Yellowbeard View Post
    marz, first of all you are commingling terminology. Second, you are wrong. Third, it's against the forum rules to insult other members here. Your posts have been edited.

    In the context of this thread, the original answers are correct for the motherboards listed in the first post. There is no DDR1 memory (184 pin DDR) made that is PC6400. The fastest I recall made in 184 pin DDR1 was PC4400 or DDR533 or possibly PC4500 aka DDR566 or so. No DDR ever got close to PC6400 speeds aka DDR800.

    The only manufactured PC6400 memory is DDR2, 240 pin and as noted above:
    OK so I am just making this up right? I just made up that I have 2, not 1 but 2 computer that are using DDR-400 PC6400 RAM and is not DDR-2...

    Second, there is a difference between insulting someone and providing factual evidence that someone does not know what they are talking about.

    Third, you can delete me for all I care, like I said in my original post, I only created it because that customer was lied to by someone that CLAIMED they knew what they are talking about!


    I literally do anything and everything with a computer, I build them, some parts from scratch (yes I solder components and make my own pc parts since it is cheaper), I also do programming and networking and I have multiple degree's in the Computer Science field since they are different for each job, I am certified by Microsoft as well.

    But I know none of this matters obviously if you have people telling customers having issues that it is not possible to use 6400 on a 3200 PC. Doesn't even take a degree to know something like that but I guess I am wrong...

    Tah Tah

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    Re: Will pc6400 work in place of pc3200

    Quote Originally Posted by marz View Post
    OK so I am just making this up right? I just made up that I have 2, not 1 but 2 computer that are using DDR-400 PC6400 RAM and is not DDR-2...
    I think that pretty much sums it up right there.
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    Re: Will pc6400 work in place of pc3200

    Quote Originally Posted by marz View Post
    But I know none of this matters obviously if you have people telling customers having issues that it is not possible to use 6400 on a 3200 PC. Doesn't even take a degree to know something like that but I guess I am wrong...
    Did you read the thread?


    Quote Originally Posted by marz View Post
    I literally do anything and everything with a computer, I build them, some parts from scratch (yes I solder components and make my own pc parts since it is cheaper), I also do programming and networking and I have multiple degree's in the Computer Science field since they are different for each job, I am certified by Microsoft as well.
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    Re: Will pc6400 work in place of pc3200

    Yellowbeard works for Corsair, a very well known Memory company, you can't really get any closer to speaking to a Memory God then him, so I think he knows his memory very well.

    So to sum up, marz you are wrong.

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    Re: Will pc6400 work in place of pc3200

    Just a couple more points.
    Quote Originally Posted by marz View Post
    If it is an older computer, which it is, you can only use 1GB DDR RAM sticks and cannot use a 2GB DDR PC3200 or PC6400.
    I do not know of any unbuffered DDR1 modules of any frequency ever coming in 2GB modules. Reg'd ECC modules for servers were available but they won't run in desktop boards and certainly not in anything listed in this thread.

    Quote Originally Posted by marz View Post
    I have a 15 year old EVGA mobo that is DDR 400MhZ PC3200 only which has DDR PC6400 in it, just couldn't do a 2GB stick, only one.
    I'd like to see this 15 year old EVGA board considering that the company was founded in 1999, aka 13 years ago. They came out with their first MOBO well into the 2000s. And, the JEDEC standard for DDR memory of any kind for MOBOs was not finalized until 2000. No boards before 2000 had DDR memory compatibility. Or, did you make this motherboard yourself?

    Quote Originally Posted by marz View Post
    FYI, I have an Emachines that I am using right now to post this that has DDR (NOT DDR-2) that is PC6400!
    Also, there is NO DDR1 PC6400 memory manufactured by anyone and you certainly won't find an eMachines computer able to hit those frequencies. The top overclockers in the world can barely do it and that's using insane voltages, extraordinarily rare PC4800 DDR1 memory, liquid nitrogen cooling, and quite a bit of luck.

    http://www.xtremesystems.org/forums/...light=700+Club

    But, if you want to prove any of us wrong, post some pictures and screenshots of your "DDR400 PC6400" memory you claim to have, of your eMachines running DDR1 6400 memory, and of course some of these wonderful devices you have soldered together on your own. Be sure to show the MAINBOARD, MEMORY, and SPD tabs using CPU-Z.
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    Re: Will pc6400 work in place of pc3200


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