Rare Intel Pentium II/III Intel Confidential CPU

[JLA]

http://www.cpu-world.com/forum/viewtopic.php?t=2085

Does anybody have any info on this CPU?

[gshv]

[JLA]

You can view photos of this processor at the following link

http://www.jlaforums.com/viewtopic.php?t=264249

[Marcin]

That is Pentium II 400 Mhz 512 KB cache Engineer Smaple

[JLA]

This is the info from the link above

Celeron III 400 MHz ES (Week 26, Year 1998)INTEL CONFIDENTIAL - 80524PY400512 Q567 - O82632SUA0-0144 A4

This particular engineering sample is one of the hardest CPU to identify in this collection. First, it comes in a classic P-II cartridge. When booting, BIOS recognized the sample as a "Pentium III". The CPUID of this CPU is 0x670, which means that this is a P-III CPU with an early Katmai core. However, markings begin with "80524" which stands for all the P-II Celeron line. More, this samples comes with 0 KB of L2 Cache, even with the right motherboard and use by default a 6 x 66 MHz clock scheme. This sample seems to be a never-produced Celeron based on the Katmai core (firsts P-III Celeron were based on the Coppermine core)

[Marcin]

[JLA]

At first glance, we would have agreed with you, but if you read the link, it does make alot of sense.

They have one just like it - look at their pics.

It comes up in the bios at a PIII - and has a Katmai core yet the 80524 is from the Celeron Line and there is 0KB of L2 Cache

The label on ours states runs at Katmai - runs at 500MHz

I would have to say The_Mad 's info would have to be the most credible info on this processor

[xsecret]

BTW, mine seems a bit earlier and it's a SUA sample. "SUA" means something is disabled to allow the processor to boot. It's perhaps the L2 cache on my sample. You should try your CPU on a motherboard to look at the CPUID

[JLA]

Ok, we installed the processor on a machine and ran the Dos HWINFO.EXE.

This is the CPU information we found on this processor

CPUID 00000670
CPU Stepping - Katmai
CPU Vendor Name - GenuineIntel
CPU - Original OEM
CPU Brand ID - 00

Intel Pentium III 498.1 MHz
512K L2 Cache

Processor Number
000-0670-0000-A0FC-EC4E-3862

So it looks like this is a Pentium III 500MHZ Katmai processor packaged in a Pentium II 400Mhz Cartridge

[CPUShack]

interesting that even the product number is wrong (I have seen PIIIs is PII cases but the product nu,ber is always right)