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2. I want to put a new processor in my system. It is pentium 133. What is the maximum it will take?

The first thing to check is your documentation if you have any. If you don't then the next thing to check is the motherboard itself to see what socket and chipset it is. The white processsor socket has the number embossed into the plastic. If it is socket 5 then you are almost certainly at the limit of the mainboard. If it is socket 7 then look for a black chip with intel on it. If it is intel HX or FX then then maximum will be Pentium 200 (not MMX). If it is intel VX or TX then the maximum is 233mmx.

For other chipsets it requires to look a bit closer at other factors. The first thing to check is whether the board supports mmx processors or not. The easiest clue for this is voltage settings for the processor. The early MMX processors had voltages ranging from 2.8v for Intel to 3.2/3.3v for AMD. If your board has jumpers (or dip switches) to set voltages in this range then it will support MMX Processors and the limit will be at least 233mmx. If it doesn't then it will support non MMX Processors up to 200MHz.

Note that there is still a chance that it may support speeds above this. Although at the time that the 133 (or 133mmx) were in production the limits were as above, your system may have had a motherboard replacement or have been built much later using an old chip on a newer motherboard.

Firstly in order to go faster it must support MMX (motherboard with voltage settings), secondly it needs to be a non intel chipset (VIA, ALI,SIS etc) since intel never produced a socket 7 Processors beyond 233MHz (they went to slot 1 pentium II for faster Processors) their chipset did not support faster socket 7 chips. In order to check for the maximum speed possible it is important to understand how the speed settings are done for the chip. The speed settings for all chips are done in 2 parts, the first is the Bus speed (50,60,66,75,83,95,100 for socket 7) and the second is the multiplication factor that mutiplies the bus speed up to the full processor speed. To explain it is best to illustrate with an example. An Intel 133mmx Processor runs at 66bus on a multiplication of 2 (2x66=132 - the difference is due to the fact that the bus speed is not in fact 66 exactly but in fact 66.666.. ). An Intel 233mmx runs at 66bus on a multiplication of 3.5 (3.5x66=231). To check for your maximum you need to just multiply together the maximum bus speed and the maximum multiplication factor eg 5.5x100 = 550 maximum. Assuming you can set the correct voltage then this will be your maximum possible. (note that there is still unfortunately no guarantee that this will work in all cases as there are motherboards that in theory support up to 500 but will in practice not work successfully with an AMD k6-2-500).


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