Some 64Meg simms may not work in a Q605. See:

http://www.lowendmac.com/tech/64mb.html

Also, it says no 64Meg simms work in the Centris 610 or 650.
Tom

>
>For starters, the 64 meg SIMMs work just fine in the 40 MHz Quadra 605 /
>Performa 475 systems. I haven't tested them in any Q800 / Q650 yet, but
>I'll report the status of that when I have a go.
>
>They're physically small enough that there is no issue with installing
>them while a heat sink is on the 68040 (of course), and they're CHEAP -
>$less than $12.00 USD apiece!
>
>This is how they are listed:
>SNFP32U/064/F5V4K   64 MEG 16*32 4K REF APPLE/MAC 72 PIN SIMM
>
>The place is Coast to Coast memory and you can find the listing here:
>http://www.18004memory.com/category.asp?pagetoview=2&catid=9&subcatid=9
>
>I only buy from them over the phone - their web site's credit card stuff
>is a little wacky and I don't trust it. (1-800-4MEMORY)
>
>

-- 
Tom Jernigan,  jernigantc@ornl.gov
presently at General Atomics in San Diego, Bldg 13/551
Phone (858) 455-4122, FAX (858)455-4515