CPUs Intel Pentium, AMD K5 or K6 for Socket 7 Your mainboard must
be made to accommodate the CPU you are considering upgrading to.
Check mainboard manufacturer's documentation or website to confirm
that your board has the bus speed (FSB) setting, multiplier setting
and voltage setting for the processor you desire. Some boards may
or may not accept an MMX processor, so please look into this when
upgrading. For a quick reference guide of bus frequency and voltage
settings required for particular CPUs, click here. Intel Pentium
II Celeron or Klamath Processor for Slot 1 A Pentium II fits into
a slot (called "Slot 1") rather than a socket. If you are upgrading
a processor that fits into socket, like a 486 or a Pentium, keep
in mind that a Pentium II will not work in it's place. For a quick
reference guide of bus frequency and voltage settings required for
particular CPUs, click here. Intel Pentium II Deschuttes or Xeon
Processor for Slot 1 A Pentium II fits into a slot (called "Slot
1") rather than a socket. If you are upgrading a processor that
fits into socket, like a 486 or a Pentium, keep in mind that a Pentium
II will not work in it's place. A Deschuttes or Xeon Pentium II
requires a 100 MHz bus speed. If you are upgrading from a Celeron
or Klamath type Pentium II processor make sure that your mainboard
can support a 100 MHz bus speed. For a quick reference guide of
bus frequency and voltage settings required for particular CPUs,
click here. Intel Pentium II Celeron for Socket 370 When Intel decided
to change their processor platform from a slot to a socket, the
Celeron was the first processor to be affected by this transition.
All Socket 370 motherboards will support the Socket Celeron. Intel
Pentium III Katmai and Coppermine for Slot 1 or Socket 370 There
are two different types of Pentium III processors. The Katmai is
the .25u processor, very similar to the Pentium II and the Coppermine,
which is a .18u processor that is available to fit in either a Slot
1 or a Socket 370. Be aware that due to the LOWER voltage requirements
of a Coppermine processor, it may not work in all Slot 1 or Socket
370 motherboards. Some of the Coppermines require a 133 MHz front
side bus. Be aware of whether or not the board you use supports
this as well. AMD K6-2 Processors for (older) Socket 7 If your motherboard
does not support a 100 Mhz front side bus, it is still possible
to run an AMD K6-2 using the 66 MHz FSB, as long as the 2.2 voltage
is available. These processors include the 300, 333, 350 (running
at 333), 366 and 400. For a quick reference guide of bus frequency
and voltage settings required for particular CPUs, click here. AMD
K6 2 processors now have what is called a "CXT" core that will change
a multiplier of 2 on your processor to a 6 using an internal multiplying
feature. It is necessary, however, to have an updated BIOS that
will be able to identify this modification or your CPU ID will come
up as a K6 2 300 (the slowest available K6 2). It is necessary to
check with the motherboard manufacturer to see if such a BIOS revision
is available for your board. If your board's motherboard manufacturer
does not acknowledge that a BIOS update will utilize the CXT core
and allow your older board to run at 400 MHz, your CPU WILL only
be running at 133 MHz. AMD K6-2 and K6-3 Processors for Super Socket
7 A K6-2 or K6-3s made to work with a 100 MHz bus can actually work
well with a 66 MHz bus, however, these processors require a 2.2
or 2.4 voltage setting that not all mainboards can support. Check
with the mainboard manufacturer's documentation or website. For
a quick reference guide of jumper settings you may need for particular
CPUs, click here. AMD K-7 Athlon Processors for Slot A K7s do not
work in place of K6s. Also, despite having the same physical shape
and size as the Pentium II's slot, the K7 will not work in place
of the Pentium II. The K7 Athlon requires it's own type of motherboard
with a slot that is referred to as "Slot A".
