I'm suspicious of the lower voltage and/or higher clocked K6-2 examples if they also have late date codes. The 1.9V CPU you opened is visibly different inside though.
There's also a 2.0V rated CPU that's marked for something like 475MHz I think.
I wish these CPUs were still dirt cheap in quantity.

Did anyone ever find a delidded picture of an actual K6-3+? Just curious if the mod that's been developed actually matches how AMD configured the "official" ones.

shamino wrote on 2022-03-17, 01:49:

I'm suspicious of the lower voltage and/or higher clocked K6-2 examples if they also have late date codes. The 1.9V CPU you ope […]
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I'm suspicious of the lower voltage and/or higher clocked K6-2 examples if they also have late date codes. The 1.9V CPU you opened is visibly different inside though.
There's also a 2.0V rated CPU that's marked for something like 475MHz I think.
I wish these CPUs were still dirt cheap in quantity.

Did anyone ever find a delidded picture of an actual K6-3+? Just curious if the mod that's been developed actually matches how AMD configured the "official" ones.

The cracked one I opened, the shape of that core suggests that there is no cache in there. What the empty smd spaces are for I’ve no idea.

Yeah, fritz came along and had a de lidded 3+ and that was the last piece of the puzzle, soon as we all saw it it was obvious what needed to be done. This was alp figured out in the same thread, the thread was just re named.
SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

On the K6-iii, might be worth looking at the pads in the top corners:

They're marked slightly differently, in a similar way to the k6-2+.

My guess is that the pads marks with a single tiny dot are possibly Vcore, unmarked are Gnd, 2 tiny dots might be Vio (but they never seem to have components fitted), don't know about the 3 tiny dot one. The slightly larger dots for config pads. So most components are capacitors for Vcore, with a couple of disguised 0-ohm links to pull the config pads high or low. Would need to go through them with a broken chip and a multimeter to see what's connected to what (e.g. check resistance between all pads mark with two tiny dots).

snufkin wrote on 2022-03-17, 13:19:

On the K6-iii, might be worth looking at the pads in the top corners: k6iii_possibleConfig.jpg […]
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On the K6-iii, might be worth looking at the pads in the top corners:
k6iii_possibleConfig.jpg

They're marked slightly differently, in a similar way to the k6-2+.

My guess is that the pads marks with a single tiny dot are possibly Vcore, unmarked are Gnd, 2 tiny dots might be Vio (but they never seem to have components fitted), don't know about the 3 tiny dot one. The slightly larger dots for config pads. So most components are capacitors for Vcore, with a couple of disguised 0-ohm links to pull the config pads high or low. Would need to go through them with a broken chip and a multimeter to see what's connected to what (e.g. check resistance between all pads mark with two tiny dots).

Yeah, I’m betting that those are the 0,128,256 kb cache config pads. But so far as I know AMD never released a 128k version…. But they may have released a 0kb version….🤔