The description says it is an BL3 on a prototype interposer. But is has Jaton branding on it. Maybe it was something that was never sold but the interposer doesn't look like a prototype to me.

My bet is that is was sold as a 75Mhz part as the seller said they couldn't get it to run at 120Mhz.

I'm also not finding any reference to a 100Mhz BL3 or other 386-486 upgrades that were sold any faster than 75Mhz.

there's clearly a VRM on the bottom there?

if that's actually the one they're selling, seeing as it's not an actual photo, which is what makes this highly suspicious in the first place, how hard can it be to just put up a photo of it?

I mean, isnt the price enough to deter anyone from buying it?

luckybob wrote on 2022-05-17, 05:02:

I mean, isnt the price enough to deter anyone from buying it?

I agree with you, but some people have either deeper pockets and/or a desire to get something specific at practically any cost . I am not judging, I've been down a similar road (though 600S or more for a CPU is really pushing it, IMHO, as my Intel 9900K cost less than that when new and top of the line, AFAICR) .

imi wrote on 2022-05-17, 03:05:

there's clearly a VRM on the bottom there?

if that's actually the one they're selling, seeing as it's not an actual photo, which is what makes this highly suspicious in the first place, how hard can it be to just put up a photo of it?

No.

On the chip that is being sold, only 4 small SMD resistors are on the underside... no VRM.

It is a 5v chip, the Blue Lightnings needed a step down in volts i.e. 3.3v to be able to increase frequency and performance, they are directly proportional to each other.

you got a picture of the actual chip being sold?

imi wrote on 2022-05-17, 12:57:

you got a picture of the actual chip being sold?

Yes, it is in the listing.

They uploaded more pictures to add to the first couple. Same "Jaton" pcb... but no VRM.

It is a 5 volt cpu i.e. not blue lightning. Though if a chip swap was done... i.e. from a proper blue lightning source de-soldered to solder onto this board... without the voltage manipulation down from 5 volts... none of the features would work as they depend on the reduction in volts. No only that... the chip would be on borrowed time running at higher voltage than in spec.

for some reason the other pictures wouldn't load on my phone... that certainly looks like a shoddy hand soldering job ^^