Hi
Can You all write this number of successful and unsuccessful moded cpus? Maybe this is the clue?

nope this is the package number, nothing to do with it, I think.
K6-2 has 26050, k6-2 cxt has 26051 and so on...

but in 486 time You can find Am5x86 133/160 core on 486 dx4 100 cpu by that number

Yeah but I think all k6-2+ are potential k6-3+ with that mod

My 550mhz k6-2+ has the same number

lukas12p wrote on 2022-03-09, 09:19:

Hi
Can You all write this number of successful and unsuccessful moded cpus? Maybe this is the clue?

All of my + cpus say the same number. 500 2+, 550 2+, 550 3+, 570 2+

So far all of the 2+ 570s have unlocked without issue. They are basically giving the same results as a typical 550 3+ With overclocking and everything

Is that your chip in the pic? Have you modded it? If so post results.

No, he reposted my photo

The concrete polyurethane seems to be a better match for the original stuff than the first urethane stuff I used in the pics.

But the thermal adhesive epoxy seems to be a even better option.

It seems to look pretty good as a final product also. This time around I used it on the core and the corners.

I’ll do some tests with it and see how well it does.

The really nice thing about this stuff is that it seems to set up quickly a matter of minutes, and I imagine mostly full cure is less than a day. Where as the other stuff seems like a week.

When doing this it’s hard to explain just how little you have to use, it’s about as much as a very small rain drop on the corners and about a medium rain drop on the core, but be sure to spread it over the core kinda thin, the point is to smoosh the ihs against the core.

The epoxy starts to set up so quick that I really didn’t stop and try to take pics before putting the ihs on, sorry.

Anyway, I present to you the latest method:

Example of epoxy applied:
Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

Epoxy cpu lives!

Btw, does the k6 have a temp sensor or is this on the mobo? (It doesn’t have a tab type one under the socket)

Sphere478 wrote on 2022-03-12, 08:42:

Epoxy cpu lives!

Btw, does the k6 have a temp sensor or is this on the mobo? (It doesn’t have a tab type one under the socket)

I don't think the CPU has got a sensor. There must be one in the socket. What board is this?

Doornkaat wrote on 2022-03-12, 08:44:

Sphere478 wrote on 2022-03-12, 08:42:

Epoxy cpu lives!

Btw, does the k6 have a temp sensor or is this on the mobo? (It doesn’t have a tab type one under the socket)

I don't think the CPU has got a sensor. There must be one in the socket. What board is this?

https://www.ultimateretro.net/en/motherboards/10151

Sphere478 wrote on 2022-03-12, 08:56:

Doornkaat wrote on 2022-03-12, 08:44:

Sphere478 wrote on 2022-03-12, 08:42:

Epoxy cpu lives!

Btw, does the k6 have a temp sensor or is this on the mobo? (It doesn’t have a tab type one under the socket)

I don't think the CPU has got a sensor. There must be one in the socket. What board is this?

https://www.ultimateretro.net/en/motherboards/10151

R55 could be a thermistor. Can't say for sure though.

Doornkaat wrote on 2022-03-12, 09:00:

Sphere478 wrote on 2022-03-12, 08:56:

Doornkaat wrote on 2022-03-12, 08:44:

I don't think the CPU has got a sensor. There must be one in the socket. What board is this?

https://www.ultimateretro.net/en/motherboards/10151

R55 could be a thermistor. Can't say for sure though.

On my non ultra that IC is a pink cylinder. You may be correct. There is another one located by the rear I/O by pci slots

Mistery solved I guess, though it would have been nicer if there was an on-die sensor.🤷‍♂️

Doornkaat wrote on 2022-03-12, 09:49:

Mistery solved I guess, though it would have been nicer if there was an on-die sensor.🤷‍♂️

I wonder if it could be replaced with a tab type on a foam pad with a little TIM

Sphere478 wrote on 2022-03-12, 08:42:

Epoxy cpu lives!

Btw, does the k6 have a temp sensor or is this on the mobo? (It doesn’t have a tab type one under the socket)

It doesn't have an integrated sensor, hence also no thermal protection.
The thermistor is instead located on the motherboard inside the socket hole, and are as a result woefully inaccurate.

Sphere478 wrote on 2022-03-12, 10:32:

Doornkaat wrote on 2022-03-12, 09:49:

Mistery solved I guess, though it would have been nicer if there was an on-die sensor.🤷‍♂️

I wonder if it could be replaced with a tab type on a foam pad with a little TIM

I'm pretty sure it could but I have no idea how to figure out the right values.

Thinking about this again, you could put a copper plate with a soft ~1mm thick thermal pad for electrical insulation into the socket so the CPU has more direct contact to the thermistor.
Know what I mean?

The problem adapted to my skillset and available junk would go... get thermal foam pad out of junk CDROM... cut about 1cm off a piece of ~1/4" copper or aluminum pipe.... squish that to slightly under approx distance between CPU and thermistor... thermal epoxy it to CPU above where thermistor is, drop foam pad on thermistor (and if you're paranoid, tape off everywhere a loose copper pipe could short) squish CPU into socket and lock.

BitWrangler wrote on 2022-03-12, 17:04:

The problem adapted to my skillset and available junk would go... get thermal foam pad out of junk CDROM... cut about 1cm off a piece of ~1/4" copper or aluminum pipe.... squish that to slightly under approx distance between CPU and thermistor... thermal epoxy it to CPU above where thermistor is, drop foam pad on thermistor (and if you're paranoid, tape off everywhere a loose copper pipe could short) squish CPU into socket and lock.

He gets it! 👍

BitWrangler wrote on 2022-03-12, 17:04:

The problem adapted to my skillset and available junk would go... get thermal foam pad out of junk CDROM... cut about 1cm off a piece of ~1/4" copper or aluminum pipe.... squish that to slightly under approx distance between CPU and thermistor... thermal epoxy it to CPU above where thermistor is, drop foam pad on thermistor (and if you're paranoid, tape off everywhere a loose copper pipe could short) squish CPU into socket and lock.

The smd has exposed contacts. But could work, “bring the temp to the cpu”

Doornkaat wrote on 2022-03-12, 12:37:

Sphere478 wrote on 2022-03-12, 10:32:

Doornkaat wrote on 2022-03-12, 09:49:

Mistery solved I guess, though it would have been nicer if there was an on-die sensor.🤷‍♂️

I wonder if it could be replaced with a tab type on a foam pad with a little TIM

I'm pretty sure it could but I have no idea how to figure out the right values.

I would have to remove the sensor and solder leads to it, and attach several different value resistors or use a POT and make a temperature vs resistance graph noting the resistance the bios displayed it’s either a ptc, ntc the graph will tell. Then I have to find a device that matches the graph I make.

0xCats wrote on 2022-03-12, 11:28:

Sphere478 wrote on 2022-03-12, 08:42:

Epoxy cpu lives!

Btw, does the k6 have a temp sensor or is this on the mobo? (It doesn’t have a tab type one under the socket)

It doesn't have an integrated sensor, hence also no thermal protection.
The thermistor is instead located on the motherboard inside the socket hole, and are as a result woefully inaccurate.

I thought that was the case, but was wondering if the 2\3+ was a exception. Makes sense that it wouldn’t be since it is the same socket. I have one bobo with a tab sensor. But didn’t see one here.I think you guys are correct about r55 😀