aka "it's the cache, silly"

Short answer #1 - specs:

• Celeron 'D' = Prescott core, 256KB full-speed L2 cache, 533MHz effective FSB, no Hyperthreading, 2.4 - 2.93GHz
• P4 = Northwood core, 512KB L2, 400MHz FSB, 2.0 - 2.8GHz
• P4 'A' = Prescott core, 1MB L2, 533MHz FSB, 2.4 - 2.8GHz
• P4 'B' = Northwood core, 512KB L2, 533MHz FSB, 2.4 - 2.8GHz
• P4 'C' = Northwood core, 512KB L2, 800MHz FSB, HT, 2.4 - 3.2GHz
• P4 'E' = Prescott core, 1MB L2, 800MHz FSB, HT, 2.8 - 3.4GHz
• P4 5xx series = Prescott core, 1MB L2, 800MHz FSB, HT, 2.8 - 3.6GHz, Socket T
• P4 'EE' 478 = Northwood core, 800MHz FSB, HT, 3.2 - 3.4GHz
• P4 'EE' LGA775 = Prescott core, 800MHz FSB, HT, 3.4GHz, Socket T

Complete cheatsheet for P4-class CPUs∞. Ditto from Tech-Report∞.
More on the new Intel numbering schema∞ according to Ars.


Short answer #2 - performance:

• Anand roundup 6/24/04∞ - Celeron 'D' is much better than previous Celerons, but frustratingly few benchmarks vs. the P4 (yay corporatized NDA sites)
• another incomplete roundup∞ (Sharky, only mid- to high-end)
• Prescott performance∞ (Tom's, has AMD but no Celerons)
• SPECINT2000 and SPECFP2000∞ (search for Intel)

Long answer - architecture:

• Caching∞
• P4 in depth part 1∞ and part 2∞
• Pipelining∞
• Bandwidth and Latency∞
• Thread-Level Parallelism∞ (the more general term for hyperthreading) and its implications for servers∞
• TLP aka SMT aka HT from Hannibal's take∞
• PCI Express∞

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