PC133 along with PC3200

Posted on 2006-05-26
Last Modified: 2012-06-21
I bought a new mother board. It came with 512MB of UTL30215 PC3200 DDR 400Mhz memory. My old mother board had a 512MBQ8 PC133U-333-542-Z memory stick.

Can I mix the two?
Question by:ESQuicksall
    LVL 30

    Accepted Solution

    if the motherboard supports, yes.. but you don't want to do that.  mixing RAM leads compatibility or even slowing the system down...
    LVL 30

    Expert Comment

    cool thank you!
    LVL 95

    Expert Comment

    by:Lee W, MVP
    Let me be clear - no motherboard I'm aware of supports using both DDR and PC133 SDRAM at the same time - some boards may have slots for both, but you can't use both at the same time.  These are two different types of memory with two different kinds of slots - you won't be able to use the old PC133 in the new DDR system unless the new DDR system also has PC133 slots (which today, is increasingly unlikely).
    LVL 30

    Expert Comment

    @leew, I did have a board that a client purchased about 3-4 years had 4 "Tritieary?" IDE interfaces so that you can put 8 IDE drives directly on the motherboard..and it had DDR & PC133 slots and you can have them both work...What would happen is that you get the extra RAM, but the speed is a fast as the slowest link.  go figure.

    "bleeding edge useless technology"

    I forgot the manufacturer (ching-chiang-ding-dong) some country where you eat noodles.

    Author Comment

    Leew, I see what you mean. I looked at my new mother board and the PC133 memory will not even fit into the slots.

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