Panorama of Intel overdrive CPUs, OEM Boosted cpus produced during the 90s. They were produced with the designated purpose of being used to upgrade PCs.
The OverDrives typically possessed qualities different from 'standard' CPUs' with the same speed steppings. Those included built-in voltage regulators, built-in heatsinks, and fanless operation and other features that made them more able to work where an ordinary edition of a particular model would not.

80486 upgrades
		ODP486SX-20
		SZ 675 / Stepping A2
		C2170595
		20 Mhz
		40 Mhz
		USA
		March 1992
		The first Overdrive serie Without OEM heatsink

		ODPR486DX-25 v 3.0
		SZ 877 / Stepping aB0
		C4020406
		25 Mhz
		50 Mhz
		USA
		Jannuary 1994

		SX2ODP50 v 1.0
		SZ 901
		C4080417
		25 Mhz
		50 Mhz
		Malaysia
		May 1994

		DX2ODP66 v 4.0
		SZ 933 / Stepping aC0
		C5080832
		33 Mhz
		66 Mhz
		USA
		March 1995

		DX4ODP75 v 1.1
		SZ 956 / Stepping A
		C5300083
		25 Mhz
		75 Mhz
		USA
		July 1995

		DX4ODPR100 v 1.1
		SZ 959 / Stepping A
		C5300083
		33 Mhz
		100 Mhz
		USA
		Jannuary 1996

80486 > Pentium 80501 upgrades
		PODP5V63 v 2.1
		SU 013 / Stepping C0
		C540245W-1443
		33 Mhz
		63 Mhz
		USA
		November 1995

Pentium 80501 upgrades
		PODP5V133 v1.0
		SU 082
		L6123976-0020
		66 Mhz
		133 Mhz
		Malay
		April 1996

Pentium 80502 upgrades
		PODP3V125 v 1.0
		SU 081 / Stepping aC0
		L6253320-0463
		50 Mhz
		125 Mhz
		Malay
		June 1996

Pentium 80503 MMX upgrades
		PODPMT60x150
		SL 24V
		L7054863-0609
		60 Mhz
		150 Mhz
		Malay
		February 1997

Pentium Pro 80521 > Pentium II 80522 upgrades
		PODP66X333 V 1.1
		SL 2KE / Stepping TdB0
		692077-002
		66 Mhz
		333 Mhz
		USA
		May 1999