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2. Macintosh Plus - Wikipedia

   en.wikipedia.org/wiki/Macintosh_Plus

   The new extended Plus keyboard could also be purchased. Unfortunately, this upgrade cost almost as much as a new machine. The Mac Plus itself can be upgraded further with the use of third-party accelerators. When these are clipped or soldered onto the 68000 processor, a 32 MHz 68030 processor can be used, and up to 16 MB RAM. [8]

3. Macintosh 512K - Wikipedia

   en.wikipedia.org/wiki/Macintosh_512K

   Though the memory had been quadrupled, it could not be upgraded. The large increase earned it the nickname Fat Mac. A 64 KB ROM chip boosts the effective memory to 576 KB, but this is offset by the display's 22 KB framebuffer, which is shared with the DMA video controller. This shared arrangement reduces CPU performance by up to 35%.

4. Macintosh 128K - Wikipedia

   en.wikipedia.org/wiki/Macintosh_128K

   Although this had always been planned from the beginning, Steve Jobs maintained if the user desired more RAM than the Mac 128 provided, he should simply pay extra money for a Mac 512 rather than upgrade the computer himself. When the Mac 512 was released, Apple rebranded the original model as "Macintosh 128k" and modified the motherboard to ...

5. Macintosh 128K/512K technical details - Wikipedia

   en.wikipedia.org/wiki/Macintosh_128K/512K...

   Protected memory was only added to Macintosh computers with the release of the Mac OS X operating system. According to Andy Hertzfeld, the Macintosh used for the introduction demo on January 24, 1984, was a prototype with 512k RAM, even though the first model offered for sale implemented just 128k of non-expandable memory. This prototype was ...

6. Apple M3 - Wikipedia

   en.wikipedia.org/wiki/Apple_M3

   The M3 Pro has a 192-bit memory bus where the M1 and M2 Pro had a 256-bit bus, resulting in only 150 GB/sec bandwidth versus 200 GB/sec for its predecessors. The 14-core M3 Max only enables 24 out of the 32 controllers, therefore it has 300 GB/sec vs. the 400 GB/sec for all models of the M1 and M2 Max, while the 16-core M3 Max has the same 400 ...

7. Mac Mini - Wikipedia

   en.wikipedia.org/wiki/Mac_Mini

   The upgrades make the 2006/2007 models perform better than the 2009 models. [citation needed] Geekbench has shown the 2.33 GHz Core 2 Duo fitted Mac Mini with 2 GB of RAM has a score of 3060 whereas a late 2009 Mac Mini with 2 GB of RAM has 3056 making the two machines fairly comparable. [39] [40]