I saw a lot of K6-2 processors for scrap recently, and upon inspection I saw a K6-2+ in the picture. I didn't have one of these yet so I figured it was worth watching. I kept trying to make out details of the other processors and it kinda sorta looked like one might be a K6-III too, but it was just as likely to have been a jpeg artifact. I managed to win the listing for a good price and the lot was delivered today...
... in a bubble mailer... But hey, the seller put a "Handle with Care" sticker on the mailer, so it was probably all good, right?😓
Thankfully, they packed them pretty decently, with a 4 chips in a row, with layer of bubble wrap between the next 4 chips. At first glance I'm not seeing any broken pins though tons of them are severely bent, but I was expecting that anyway... It will take hours to get them all straightened...
So, I dug through the lot, spent a good hour cleaning all the hardened thermal paste off of them and boy, what a score! The lot contained:
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1x K6 PR2-166ALR
1x K6-2 300AFR (with an interesting little scan code printed on it with "300Mhz" next to it... never seen one like this before)
3x K6-2 500AFX
2x K6-2 450AFX
3x K6-2 400AFQ
3x K6-2 380AFR
and the best ones of the lot...
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K6-2+ 550ACZ
K6-III+ 500ANZ
🤩
Still kind of in shock over this find. It looks like all the pins are intact on both of them too. The K6-2+ 550ACZ is 2.0v part, and appears to be the second best K6-2+ you can find, just below the 570ACZ.
The 500ANZ is a 1.8v part... which according to CPU-World makes it the only 500Mhz+ K6-III+ rated for less than 2v. Probably not much of a stretch to say that this is one of the best K6-III+ models I could have found... possibly even better than the 550ACR (2.0v).
I have a bunch of SS7 boards. If you had to couple one of these chips with a board for the best SS7 system possible, with the most flexibility (underclocking, overclocking, performance, compatibility, stability, etc.) what would you choose?