Unsupported Memory
Low End Mac Reader Specials
Memory To Go Special: MacPro 8 Core Memory 4GB kit $154 / 2GB kit $94, New 2008 iMac 2GB $46. MacBook Pro / MacMini / iMac Intel Core2 DUO 2GB $44 / 1GB $23--Free shipping available.
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MacBook/MacBook Pro / MacMini / iMac Intel Core2 DUO DDR2 667Mhz 4GB Kit $80, 3GB Kit $60, 2GB Kit $40, 1GB $20 - Click to Maximize your Macs...
- 2000.11.03
Q: I just won a SuperMac
C500/240. The maximum RAM for this machine is listed at
144 MB, but I saw 168-pin DIMMs that were 128 MB. Can I use 128 MB
DIMMs to
bring this machine to
256? 272? Where did the extra 16 come from?
A: On your SuperMac, you have 2 RAM slots but also 16 MB installed on the motherboard. Your slots support up to two 168-pin DIMMs at a minimum speed of 60 nanoseconds and capacity of 64 MB each. The 16 MB from the board add up with the two slots and can give up to 144 MB of RAM.
I wouldn't risk buying 128 MB DIMMs since they are not supported. The chances of your Mac being unable to start up or being erratic are there. I personally saw people trying to use RAM that was not supported on their Macs, and it just didn't work out.
You can always give it a shot, but there is no guarantee that it will work properly. In fact, asking about it on the SuperMacs email list turned up an interesting response: the memory works, but the computer only sees 64 MB, not 128 MB.
Not sure if you should upgrade your old Mac or replace it? Check the Mac Daniel index to see if we've already addressed your problem.
Recent Mac Daniel columns
- Bringing G3 iMacs and other G3 Macs into the Tiger Age, Dan Knight, 12.07. Tips on hard drives, memory, WiFi, and getting Mac OS X 10.4 installed on G3 iMacs and other older G3 Macs.
- Multiple users on the same Mac at work, Dan Knight, 11.15. How to set up a Mac so multiple users can log in and use it - and use the same pool of work files.
- 1 working eMac from 2 broken ones, Dan Knight, 11.14. A pair of matching eMacs, each with a different failure, results in one working eMac and lots of leftovers.
- Problems running Classic mode in Tiger, Dan Knight, 11.08. After upgrading to Tiger, the old Classic installation stopped working. Where to find the pieces to get everything up to date.
- More in the Mac Daniel index.
Links for the Day
- Mac of the Day: PowerBook 170, Oct. 1991 - At 25 MHz, the PB 170 was at the top of the original PowerBook line.
- List of the Day: The iPhone List Low End Mac's forum for discussing and supporting Apple's iPhone.
- August 30 in LEM history: 99: The truth about USB speed - 00: Could Eazel kill the Mac? - Mac OS 8.1 on a IIci and LC III - 01: Beyond MHz and GHz - Getting a handle on email - Thanks for the IBM PC, Dad - Apple's anniversaries - 02: Mac OS X v10.2 - iBook video out - 04: Things that freak out my students - 06: Nvu and SeaMonkey can't replace Home Page - 07: DVD-RAM support
Recent Content on Low End Mac
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- Best Time Capsule and AirPort Deals, Low End Mac Deals, 08.27. 500 GB Time Capsule, $294; 1 TB, $468; AirPort Extreme Card, $39; 802.11n Base Station, $166; 802.11g AirPort Express, $60; 802.11n, $98.
- More links in our archive.
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