Specifications

Computer Architecture and Maintenance (G-Scheme-2014)

supplies for different processors, the VRM converts the 3.3V or 5V to the proper

voltage for the particular CPU you are using. Intel released different versions of the

Pentium and Pentium-MMX processors that ran on 3.3V (called VR), 3.465V (called

VRE), or 2.8V. Equivalent processors from AMD, Cyrix, and others used voltages from

3.3V to 1.8V. Because of the variety of voltages that might be required to support

different processors, most motherboard manufacturers started including VRM sockets

or building adaptable VRMs into their Pentium motherboards.

Figure. shows the Socket 7 pinout.

Figure. Socket 7 (Pentium) pinout (top view).

AMD, along with Cyrix and several chipset manufacturers, pioneered an improvement

or extension to the Intel Socket 7 design called Super Socket 7 (or Super7), taking it

from 66MHz to 95MHz and 100MHz. This enabled faster Socket 7–type systems to be

made, supporting processors up to 500MHz, which are nearly as fast as some of the

newer Slot 1– and Socket 370–type systems using Intel processors. Super7 systems also

have support for the AGP video bus, as well as Ultra DMA hard disk controllers and

advanced power management.

Major third-party chipset suppliers—including Acer Laboratories, Inc. (ALi); VIA

Technologies; and Silicon Integrated Systems (SiS)—all released chipsets for Super7

boards. Most of the major motherboard manufacturers made Super7 boards in both

Baby-AT and ATX form factors.

Prepared By – Prof. Manoj.kavedia (9860174297 – 9324258878 ) (www.kavediasir.yolasite.com)