There are several different types of computer which Ubuntu is compatible with. The type of computer you have is determined by its processor architecture; this is a technical term which just refers to what type of processor the computer has.
This guide explains which Ubuntu CDs work on which computer architectures.
PC (Intel x86)
This works on most common "IBM compatible" PC systems. If Microsoft Windows will run on your machine, then this CD should also work, although many newer systems may gain a slight performance increase if they use the 64-bit CD below. Most computers are of this type.
Systems with the following processors need this CD:
Intel 386/486 systems (although these may not be powerful enough to run the CD)
- Intel Pentium (1-4)
- Intel Celeron
- Intel Pentium M
- Intel Mobile Pentium 4
- Intel Celeron M
- Intel Core Solo, Duo (Not Core 2)
- AMD Geode (GX, LX, NX)
- AMD K6/K7 (Duron, Athlon)
- AMD Sempron models without AMD64 support
64-bit PC (AMD64)
Many new "IBM Compatible" PC systems have begun to use 64-bit components, and if the operating system (like Ubuntu) makes use of these capabilities then a slight performance increase can be gained. PCs which can run a 64-bit version of Microsoft Windows should be supported by this CD. If you are unsure whether your PC system has these capabilities then you can use the "x86" CD above, as this will work on 64-bit systems as well.
AMD Athlon 64 (Including X2 and FX)
AMD Turion 64
AMD Sempron models with AMD64 support enabled
Intel processors that support EM64T: Intel Core 2 processors, Pentium D, Pentium Extreme Edition, some versions of Pentium 4 and Celeron D
Intel Xeon with EM64T
You can use a tool like CPU-Z (for Windows) to find out if your processor supports AMD64 or EM64T.
Many older Apple Mac computers use PowerPC processors. They usually have names like "G3", "G4" or "G5". You should use the Ubuntu PowerPC CD if you have one of these computers. This CD should also work for other PowerPC systems which offer support for Ubuntu, such as the PegasOS. This will not work for the new Intel-based Apple Macs.
by James Taji