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xhoba
Joined: 20 Apr 2009
Posts: 4596
Location: Picardie, France
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 Posted: Tue Jan 21, 2025 12:30 pm Post subject: Testing Pentium 4 ES |
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I managed to test two Pentium 4 Engineering samples that look very close to each other: Q87XES and Q88XES
Both are supposed to be Pentium 4 550/550J due the JM80547PG0961M p/n written on the IHS.
I tested both on my Asus P5P43TD, here are the results:
Q87XES: DEP (Data Execution Prevention) available -> Pentium 4 550J
Q88XES: EMT64 available -> Pentium 4 551
So, Q88XES should be JM80547PG0961MM. It looks like we can’t 100% rely on the IHS markings…
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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| Posted: Tue Jan 21, 2025 1:09 pm Post subject: |
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Nice work and does make sense
Base part was JM80547PG0961
They just added M or MM based on features, which likley happened after the ES stage
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