|RAM||2 MB chip-RAM + 2 MB fast-RAM|
|Text modes||80 x 32, 60 x 32|
|Graphic modes||320x200, 800x600, 1280x400|
|Sound||4 channels, 8 bit PCM|
The Commodore Amiga 4000, or A4000, was the successor of the A2000 and A3000 computers. There are two models, the A4000/040 released in October 1992 with a Motorola 68040 CPU, and the A4000/030 released in April 1993 with a Motorola 68EC030.
The A4000 originally came in a white desktop box with a separate keyboard. Later Commodore released an expanded tower version called the A4000T.
Unlike most other Amiga models, early A4000 machines have the CPU mounted in an expansion board using a special CPU slot. The motherboard has no CPU at all. Later revisions of the A4000 have the CPU and 2 MB RAM surface mounted on the motherboard in an effort to reduce costs. These machines are known as the A4000-CR (Cost Reduced) and the surface mounted CPU is a Motorola 68EC030. The cost reduced models also made use of a Lithium-ion battery for real-time clock battery backup rather than a rechargeable NiCd battery. The NiCd backup battery is one of the most common causes of problems in an aging A4000 because it has a tendency to eventually leak. The released fluids are somewhat corrosive and can eventually damage the motherboard.