Performa 640

The 486 is held in check by a simple control panel that switches the card on and off. The system can either share one monitor or use two. Switching systems with one display is done by pressing Command and Return by default.

Aside from having a built in furnace, the Mac side is very similar to any other Performa 630 series. Two memory slots in addition to soldered RAM sets it apart more than anything. The 640 didn't sell tremendously well at $2299, partially due to the low price of comparable PC's and the availability of PowerMacs. Once the price was reduced by almost $1000, they became very popular.

Advantages

Compatibility: For light business uses in a mixed environment, the Performa 640 is very handy.

Drawbacks

Speed: Niether the 486 nor the '040 in the Performa 640 were very fast at the time of its release.
Memory: Though expandability is decent, supplied memory was not enough, both in RAM quantities and hard drive sizes.

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