Another Strange Pentium Pro ES - Q0706

[xsecret]

Another mystery here.

I put my hand on that strange (and very early) Pentium Pro ES (WW34'05 for packaging) :






There is no traces of that Q-Spec and it seems earlier than the first known Q0720. The FPO Plant code is "N", different than all other known early PPro ES ("L"). It could be a fake (I'm paranoid about fakes) but it comes directly from a friend at Intel.

There is just one reference of Q0706 on Google at this time and the chip just does not match at all : http://www.chipsetc.com/uploads/1/2/4/4/1244189/5401584_orig.jpg?252

So something is wrong. Any thought ?

[gg1978]

Kinda suspicious to me, a Q0720 is from Week 11 to 14 of 1995, i don't have my Q0720 sitting in front of me, so i forget what week mine is from, but that's what the PPro timeline indicates. Pretty sure a Q0706 would be earlier in 1995 than that. I think Q0815 is from about the same timeframe with regard to marking date


That's work week 34 of 1995, not 2005 btw


I'd say if the bondwires weren't trashed try booting it up and see what stepping it is.. Unfortunately that's not an option with this chip unless you have a wire bonder and the expertise to take the busted bondwires off..

I guess you could also measure the sizes of the CPU and cache dice and see if Neon_WA has a database of PPro CPU die sizes

[Robev]

Seems to have an extra "0" in the Sspec
Intel lists a Q076 but not a Q0706

[hardwarecop]

Very very nice old die with all the beauty of the P6 core revealed!

More modern P6 CPUs have a metal layer - they look like this:

http://u.jimdo.com/www60/o/s674ac0b1a38a76e3/img/idd5ba9b66564a758/1389568187/orig/image.jpg

(Die shot by Birdman.)

[Neon_WA]

starting with Chipset's Q0706

The markings look all good.. for the picture quality on hand
my issue is ALL Pro qSpecs for this period were 512K Pros
and I dont see Intel bothering with a 150MHz at this late date
Chipset lists that the die cap has been desoldered so there is no die codes to help out

As for your Q0706 there is one other N plant around Smithy's 150MHz Q0813
http://www.smithschips.com.au/Images/PentiumPro/PProQ0813-LG.jpg
This also doesn't have a Q in the FPO (All other non remarked qSpecs include a Q in the FPO)
but has a 94 95 copyright

The engravings on the bottom edge look all ok
The top engravings, I am not so sure on (a better pic of them my help)

The only known Pro qSpec with a 1994 copyright are Q0720 Q0721 Q0754 Q0755 Q0765 Q0766
but there are a few unmarked Pros with 1994 copyright (the copyright is found on the die cap)
E111-0073 1534814JAA 25290720AI Malay 540 ES
E119-0003 15348150AA 25273920AE Malay 541 ES
E127-0027 15348150AH 25273920AM Malay 543 ES
E137-0034 15348150AT 25301710AL Malay 546 ES

Edit >> looking at it again..realised the copyright is 1994 .. not 94

[xsecret]

Really interesting. Thanks !

here is another pic of the top markings : https://dl.dropboxusercontent.com/u/97569666/IMG_9481.jpg

Edit> yep, can't find another one with "1994" copyright, only "94".

[Neon_WA]

Thats better.. top markings look genuine now

Just wondering if Intel used one of the blank Pros and were just testing the laser marking process

[gg1978]

Yeah the 1994 copyright date was throwing me off too. Well we have a laser marker at work, and sometimes the best way to "tune it in" is to blast something.. :p

[JustOne]

I have this one: I560-0286

[Neon_WA]

[JustOne]

[CPUShack]

Just found another Q0706
Same lot, different serial
There were clearly made for a reason
be nice to know what

[gg1978]

bummer that yours is missing it's lid too