K6-2 337AFR

Discussion relating to Socket 7 hardware.
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Uranium235
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K6-2 337AFR

Post by Uranium235 »

Greetings everyone. It's been awhile since I've posted anything. The wife and kids consume nearly all my time now. I still have all of my socket 7 hardware and one of these days I'll get back to it when time allows....

Seen this odd CPU while browsing Ebay recently, an AMD K6-2 337AFR!!! Just when you thought you seen it all something strange comes along. Has anyone heard of this CPU? Anyone want to speculate what FSB this CPU runs at?

Here is the Ebay item number 150413461724
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Uranium235
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Post by Uranium235 »

This is a pic I borrowed from the auction of the K6-2 337AFR. These ran at the 75 FSB (4.5x75). Up until now I had only thought Cyrix made CPU's to run on the 75 FSB.
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jsc1973
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Post by jsc1973 »

AMD never officially released any K6 or K6-2 CPUs that were specified to run at a 75 MHz FSB. If you wanted to do so, you either ran an original K6 or an K6-2 AFR-66 out of spec, or you ran a Super 7 K6-2 below spec.

That K6-2 337 is either a remark (although I don't see any signs of that) by someone trying to create a "rarity," or it's a processor that they created for some OEM. I noticed the seller billed it as "rare," and also tagged a K6-2 380 the same way. But the 380 was a very common CPU found in store-bought PCs of that time, targeted against the Celeron 366. Nine out of 10 of them could be reset for 400 MHz without a problem.

You could sometimes get a real steal with those AMD OEM K6 chips if some of them hit the open market. Another one they sold a lot of of, around 2000, was the K6-III 333, which was certified for either 5*66 or 3.5*95. Every one of them, it seemed, would go 392 (3.5*112) on an FIC VA-503+ motherboard, at which speed they were not far from a stock K6-III 450, but about a third of the price.

I've got an AthlonII X4 620 running at 3.25 GHz in here now, but I still miss those days.
FIC VA-503+, Rev. 1.2, AMD K6-III+ 450@550MHz, 80GB Seagate ATA-100, 3dfx Voodoo3 3500 TV, TB Montego II Quadzilla, Win98se, 384MB PC100

Compaq Presario 1273, AMD K6-III+ 450@400MHz 1.8v, 40GB Samsung 5400RPM, extremely hacked Win98SE, 288 (yes, 288!) MB RAM
(Also an AMD FX-8350, which does the heavy lifting these days...)
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Uranium235
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Post by Uranium235 »

Welcome back jsc1973. Nice to see some life on this forum.
Made for some OEM would get my vote. Can't really find too much reliable info on this CPU.

Here's another link with the K6-2 337:
http://www.oldcpu.cz/CPU/AMD/K6-2/AMD-K6-2-337-AFR
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jsc1973
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Post by jsc1973 »

I found a reference to the K6-2 337 as an IBM OEM part on another site. They seem to have been made from late 1998 to early 1999.

IBM during that time made a lot of 75 MHz bus systems, mostly based on Cyrix 6x86/MII processors. IBM had a license to make Cyrix chips and sell them under their own name, so they certainly would have had 75 MHz bus capable motherboards lying around. They probably ordered these K6-2s from AMD to create systems for customers who didn't want Cyrix processors, which were fine for most things but horrible with anything that puts demands on the FPU.

AMD probably just dipped into the supply of K6-2 333/95 processors to fill these orders.
FIC VA-503+, Rev. 1.2, AMD K6-III+ 450@550MHz, 80GB Seagate ATA-100, 3dfx Voodoo3 3500 TV, TB Montego II Quadzilla, Win98se, 384MB PC100

Compaq Presario 1273, AMD K6-III+ 450@400MHz 1.8v, 40GB Samsung 5400RPM, extremely hacked Win98SE, 288 (yes, 288!) MB RAM
(Also an AMD FX-8350, which does the heavy lifting these days...)
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