Epson Progression U12 - Manual (Page 16)

Your system can support up to five mass storage devices, such
as hard disk drives, diskette drives, a tape drive, or a CD-ROM
drive. As your storage needs expand, you can install these
drives to provide the necessary space for all your data.
Because the CPU card is replaceable, you can easily upgrade
your system without having to purchase a new computer. The
CPU card is available in three models: 486SX/25, 486DX/33,
and 486DX2/66. In addition to the system speed and
performance enhancements that come with a faster CPU, the
Wingine VGA controller speeds up your video performance to
match the capability of your CPU card.
OverDrive Module
You can also enhance your system-without replacing the CPU
card-by installing an Intel OverDrive module on the CPU
card. This doubles the internal clock speed of the
microprocessor so your system runs much faster.
Math Coprocessor
You may want to install a math coprocessor to enhance the
speed and performance of mathematical calculations in certain
application programs. Roth the 486DX/33 and the 486DX2/66
cards have a math coprocessor built into the CPU and also have
a socket for an optional Weitek
®
math coprocessor chip. On the
486SX/25 card you can install an Intel 487SX/25 micro-
processor chip, which has a built-in math coprocessor.
Introduction 3