whats the difference

[Bmxpunk86pl]

Whats the difference between an i186, i286, i386, i486, i586, i686?

[Godfodda]

Originally posted by Bmxpunk86pl
Whats the difference between an i186, i286, i386, i486, i586, i686?

Transistors and instructions, perhaps?

[flounder43]

Those are the codes for the steppings of the intel processors...

pc-at ,286, 386, 486, Pentium, etc...

[Bmxpunk86pl]

sorry but i dont quite understand, can u guys explain a little more in detail. thanks alot

[flounder43]

Well, I guess I need more info on what you want to know this for....

When you see i286, i386, etc. it is just referring to an Intel, or compatible, processor. 586 they named Pentium, and so on...

[Bmxpunk86pl]

oh ok, thanks

[Bmxpunk86pl]

wait so:

i186=i186
i286=i286
i386=i386
i486=i486
i586=pentium
i686=pentium3

so whats the pentium 2 and the p4?

[JigPu]

Thats a very good question... I think Intel has shyed away from x86 markings, but my guess is that a Pentium 2 would be 686 Pentium 3 786, and Pentium 4 886.

Of course, I've never heard anybody refrence to anything above a 586 in that form. They always say "Pentium 2", or AMD K6-3...

JigPu

[Lancelot]

i186 = 8086 (186 doesn't exist)
i286 = 16bit AT CPU (8Mhz)
i386 = 16-25Mhz 16bit, 33Mhz first 32bit CPU
i486 = 32bit 'multimedia capable' CPU
i586 = Pentium, and Pentium MMX
i686 = PentiumII, Celeron, Pentium!!! and PIV
(only actual differences between PII and P!!! is in the xtra SSE(2) instructions, and ofcourse various (full speed) cache sizes and bus speeds)
i786 is prolly Itanium 64bit CPU

[David]

Is 886 going to be the AMD Sledgehammer K8 then?

[David]

an i386SX or i486SX does not have a Maths Coprocessor. An i386DX or an i486DX does.

The number after the DX is to do with the mulitplier eg:

i486DX3 75MHz is 25 x 3 I think.

i486DX2 66MHz is 33 x 2

I think i486DX4 100 is 4x 25 or 3x33. Not sure.

[JigPu]

Yeah, the number after DX is the multiplier. My 486DX2 was at 66Mhz, and bus was 33, and the 100s were 33x4. The co-processors are designated as x87 (I think) by the way.

Also, there was a 186 chip made by Intel, but it was such a huge flop that they only kept it on the market for an extremely short time. The 8086 and 8088 were of the 086 generation.

JigPu