Hardware Museum

Over 20 years of PC history

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Intel Pentium 4 661Intel Pentium 4 631
Code nameCedar MillCedar Mill
Base clock3600 MHz3000 MHz (0.83×)
Turbo full / half / single- | - | - - | - | -
Technology65 nm65 nm
Transistors188 million188 million
Die size81 mm281 mm2
Cores / threads1 / 2 1 / 2
L1 data cache1 × 16 kB1 × 16 kB
L1 inst. cache1 × 12 kB1 × 12 kB
L2 cache1 × 2048 kB1 × 2048 kB
L3 cache--
Bus typeQDR, 800 MHz, 64 bitQDR, 800 MHz, 64 bit
Bus bandwith6400 MB/s6400 MB/s
SocketSocket 775Socket 775
Voltage-1.25 V
TDP65 W65 W