TITLE
    Macintosh Performa 6400/200 Zip: Supported Memory Types (2/97)
Article ID:
Created:
Modified: 		20885
1/27/97
2/13/97
TOPIC


    This article contains important information about installing memory in some Macintosh Performa 6400 computers.

    Note: This information was included in a document included with these computers titled, "Update: New Information About DRAM Installation."

DISCUSSION


    This update contains information you need to know if you decide to add random access memory (RAM) to your computer. It replaces information about dynamic RAM (DRAM) specifications in the user's manual in the Technical Information booklet for your computer. If you don't need the information immediately, save it with your user's manual so that you'll have it ifyou ever decide to install additional DRAM in your computer.

    Your computer has Extended Data Output (EDO) DRAM Dual Inline Memory Modules (DIMMs), not the fast-paged-mode DIMMs referred to in the user's manual and in the Technical Information booklet for your computer. To take advantage of the faster RAM access time of the EDO DRAM DIMMs already in your computer, DIMMs installed later should be 64-bit wide, 168-pin 5-volt (V) buffered EDO DRAM DIMMs, with 60-nanosecond (ns) RAM access time or faster, and a 1K or 2K refresh count.

    Fast-paged-mode will be the default speed, if fast-paged-mode DIMMs are mixed with EDO DIMMS.

    Fast-paged-mode DIMMs slower than 60 nanosecond are not recommended.

    The Single Inline Memory Modules (SIMMs) from older Macintosh computers are not compatible with your computer and should not be used.

    DIMMs that require a 4K refresh count should not be used, either.


    Article Change History:
    13 Feb 1997 - Changed distribution status.



Document Information
Product Area: Computers
Category: Power Macintosh
Sub Category: Macintosh Performa 6400

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