Apple 8600 appendix Vram configurations, Cache configurations

VRAM configurations

Video RAM (VRAM), like standard DRAM, is also provided in DIMMs. Your computer comes with 2 MB of VRAM installed in two 1 MB DIMMs. (These DIMMs are installed in the two bank 1 slots.) Your computer’s VRAM can be expanded to a maximum of 4 MB by adding two 1 MB DIMMs to the two bank 2 slots. Both DIMMs must be added at the same time.

IMPORTANT The VRAM DIMMs must be 32-bit wide, 112-pin fast-paged mode with 70-ns RAM access time or faster. Do not use the 256K or 512K VRAM SIMMs used in older Macintosh computers.

Note: If you install additional VRAM and later remove it, make sure to leave the remaining 2 MB of VRAM installed in the bank 1 slots. You will not be able to use a TV as a monitor if the VRAM is installed in the bank 2 slots.

For more information about using a TV as a monitor, see Chapter 7, “Connecting Additional Equipment.”

Cache configurations

Your computer comes with a cache module already installed. To find out the exact size of the included cache module, see the “Memory” section in your Technical Information booklet.

You can replace the existing cache module with a larger one. Cache modules are currently available from third-party manufacturers in various sizes up to 1 MB. However, Apple recommends that you use an Apple-brand cache module if you want to upgrade your existing cache.

Installing PCI Expansion Cards and Additional Memory 107