- As promised last week, Intel on Sunday dropped prices on a range of Pentium 4 processors, some by more than a third. The fastest version of the chip, the 3.6GHz Pentium 4 560, dropped by 35 percent from $637 to $417. The 3.4GHz Pentium 4 550 slipped by 33 percent from $417 to $278. The 3.2GHz Pentium 4 540 dipped 22 percent from $278 to $218. The 3GHz Pentium 4 530 is down 18 percent, from $218 to $178.