Please, help identify last Pentium II released

[TobZeN]

Hi,

I am not really a collector. I want to build an old Pentium II system and kinda try to find the fastest Pentium II CPU. I tried to google and check sites, but couldn't find what I was looking for: how to identify the cpu.

So here is what I found on http://en.wikipedia.org/wiki/Pentium_II#Deschutes :

"Towards the end of its design life, Deschutes chips capable of 500MHz within Intel cooling and design specifications were produced. However, these were not marketed. Rather than destroy already multiplier-locked units, those Deschutes units that had been tested and locked with a multiplier of 5 were sold as being 333MHz. This was accomplished by disabling the 100MHz bus option."

and here is the part number for the PII-333 I found on cpu-world
80523PX333512PE is an OEM/tray microprocessor
B80523P333512E is a boxed microprocessor

But there are many different versions, which one is this last one released?

How can I identify those PII?

Hope someone can help and hope the post is in the right place.

Cheers Tobias

[debs3759]

The details pages of each of the PII (and most other processors) on this site gives the release date.

The Deschutes parts have part number ending E or PE (as in the part numbers you posted), and they were the last version.

If you are also interesting in the latest steppings of any or all versions of the chip, the latest stepping (minor bug fix) of a processor is usually the last listed sSpec on the info pages here.

[Neon_WA]

the last stepping in 333MHz P2 was dB0

the specs in this stepping were SL2TV & SL2WY

the last 333MHz sSpec ( SL2ZP ) is actually dA1 stepping

the last stepping produced in any speed Deschutes was dB1
350MHz >> SL36U , SL38M & SL3J2
400MHz >> SL38M , SL38Z & SL3D5

[TobZeN]

Thanks Deb for the quick reply.

The release date shows only the introduction date as far as I can see.

The Problem I have with the Deschutes is that according to wikipedia there are 2 versions of the 333MHz. The first one was the introduction of the Deschutes core and then the last version again also had 333MHz (see my first post).

cpu-world got 2 pages for the PII-333:
http://www.cpu-world.com/CPUs/Pentium-II/Intel-Pentium%20II%20333%20-%2080523PX333512.html
part number 80523PX333512 and cpu ids
634 (Q288)
650 (SL2KA)
651 (SL2S5)

and
http://www.cpu-world.com/CPUs/Pentium-II/Intel-Pentium%20II%20333%20-%2080523PX333512PE%20%28B80523P333512E%29.html
part number 80523PX333512PE and B80523P333512E and cpu ids
650 (SL2QF)
651 (SL2QH, SL2ZP)
652 (Q436, SL2TV, SL2WY)

both pages say it's the deschutes core, same intro-date.

What You were saying brings me to this:
take the cpu-ids from the second page

So SL2QF was first S-spec for core stepping dA0 and
SL2WY was the last S-spec for core stepping dB0, while dB0 was the last core stepping?

So all in all, the newest PII should be

http://www.cpu-world.com/sspec/SL/SL2WY.html

B80523P333512E core stepping dB0 and SL2WY S-spec ?

Thanks again, hope it's not too confusing, what I write.

Tobias

[TobZeN]

And thanks Neon_WA.

You almost confirmed what I wrote. Just a bit confusing, in that the latest sSpec is not for the latest core stepping. But You had the right idea...

Thanks again. I think I got the system now.

Cheers
Tobias

[Neon_WA]

from memory SL2TV was the sSpec produced for OEMs so was likely produced at same time as the SL2WY

FYI these are when each Deschutes stepping was officially released
dA0 >> Jan 26, 1998
dA1 >> Apr 15, 1998
dB0 >> Aug 24, 1998
dB1 >> No official release date

[TobZeN]

Thanks again Neon_WA. That's pretty good information.

Now I hope I'll find a piece and can try it out

T.

[Tetrium]

This is some interesting information. I never knew 500Mhz Deschutes parts were ever made.
I'm not sure how Intel disabled the chips 100Mhz FSB but the FSB is determined by the motherboard.
Also faster Deschutes chips usually have faster cache chips which should be easy to spot as the last Deschutes had the open type of package

Edit:I can't remember ever having seen a 333Mhz part with the open package though