VOGONS


First post, by MrMateczko

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The K6-2 450MHz I bought that I mentioned in my previous topic: AMD K6-2 (not +) - any real difference between 400-550MHz? has only three letters "MPM" after the datecode, whereas most of K6's have four letters:
IMG_20221115_202657.jpg

I have found images of two more of such CPUs here in this person's collection (not counting engineering samples):
http://www.abc-cpu.com/index.php/cpu-gallery/ … s-7-285#joomimg
http://www.abc-cpu.com/index.php/cpu-gallery/ … /5-2302#joomimg

As well as the original K6 with such marking:
https://upload.wikimedia.org/wikipedia/common … D_K6-166ALR.jpg

Any of you have such CPUs? Are those really rare? Are those limited to the "MPM" batch for K6-2's?

Reply 2 of 4, by MrMateczko

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The cooler barely gets warm, even after prolonged usage, I am not worrying about the temperatures. 😀

I have found FIVE (!) other examples of K6-2's with the "MPM" datecode from Allegro Polish website:
https://a.allegroimg.com/original/11aa27/0156 … N-5905258410234
https://a.allegroimg.com/original/11e024/bff4 … N-0161929691967
https://a.allegroimg.com/original/113aa4/890e … hz-Mhz-Socket-7
https://a.allegroimg.com/original/114005/a20c … 350MHz-SOCKET-7
https://a.allegroimg.com/original/11f8bf/8d6d … z-SUPER-7-95MHz

It seems that "MPM" is the only three symbol datecode in K6-2's, maybe they were common in Europe only?

I guess I can't call my CPU rare anymore, just uncommon. 😀

Reply 3 of 4, by Thandor

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MPM has nothing to do with the datecode. The four digits are the datecode:0003 is 3th week of 2000. I believe the MPM-part indicates which part of the wafer the die has been cut out. Inner parts are more pure than outer parts. Back in 2003 when overclocking the Athlon XP was the way to go you wanted a MPMW or XPMW slice of an early 2003 Thoroughbred B; it was more or less a guaranteed succes for 2.4GHz (as far as overclocking and guaranteed succes complement each other). AMD used this notation for all of their CPU’s.

If anyone can confirm or shed a light on the wafer slices and these codes, please do. I was looking for references but couldn’t find any and I doubt AMD has official (public) papers available on this matter 😉.

As for rarity: I have three MPM K6-2 in my collection. I don’t think they are uncommon 😀.

thandor.net - hardware
And the rest of us would be carousing the aisles, stuffing baloney.

Reply 4 of 4, by rmay635703

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Thandor wrote on 2022-11-20, 09:18:

MPM has nothing to do with the datecode. The four digits are the datecode:0003 is 3th week of 2000. I believe the MPM-part indicates which part of the wafer the die has been cut out. Inner parts are more pure than outer parts.

As for rarity: I have three MPM K6-2 in my collection. I don’t think they are uncommon 😀.

K6-2’s were binned to the max
So die position Loosely coorelates to clock speed.

Very very few k6-2s would bin 500mhz or higher which is what killed the series
Moving AMD TO the + series since lower clocks were no longer marketable

Would be interesting to see what spread of clocks are in a particular “sub code” like mpm.