Intel Pentium 66 - A80501-66


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CPU Information

General information
Type	CPU / Microprocessor
Family	Intel Pentium
CPU part number	A80501-66 (Q0353, Q0395, Q0413, Q0467, Q0626, Q0627, SX754, SX828, SX836, SX837, SX949, SX950, SZ950)
Frequency (MHz) ?	66
Bus speed (MHz) ?	66
Clock multiplier ?	1
Package	273-pin ceramic Pin Grid Array 2.16" x 2.16" (5.49 cm x 5.49 cm)
Socket	Socket 4
Introduction date	22-Mar-93
ICOMP index	567
Upgrade options	Pentium overdrive 133

Architecture / Microarchitecture
Core steppings	B1" (Q0413, SX754) B1' (Q0353, Q0395) C1 (Q0467, SX837, SZ950) D1 (Q0626, Q0627, SX949, SX950)
Manufacturing process	0.8 micron BiCMOS process, 3.1 million transistors
Data width	32 (64 bit data bus) bit
Floating Point Unit	Integrated
Level 1 cache size ?	8 KB 2-way set associative code cache 8 KB 2-way set associative write-back data cache
Physical memory (GB)	4
Multiprocessing	Supported
Low power features	System Management Mode SL power-management features
On-chip peripherals	Memory Management Unit Local Advanced Programmable Interrupt Controller

Electrical/Thermal parameters
V core (V) ?	5.15 ± 5% There were versions of Pentium 66 with different voltage range. Please follow links with processor's specification numbers for more accurate information.
Minimum/Maximum operating temperature (°C) ?	0 - 70/75 (Depends on a processor specification number). Please follow links with processor's specification numbers for more accurate information.
Typical/Maximum power dissipation (W)	13 / 17.28
Thermal Design Power (W) ?	16

Notes on Intel A80501-66
Minimum bus frequency is 33 MHz

Pictures (3)


Without heatspreader


With heatspreader
66 MHz 273-pin ceramic Pin Grid Array with heatspreader The processor has FDIV bug

With heatspreader / No FDIV bug
66 MHz 273-pin ceramic Pin Grid Array with heatspreader
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CPU ID

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NOTE: CPU ID information below was taken from one CPU and may include features that are not present in all different steppings of the Intel Pentium 66 MHz CPU.

Manufacturer:	Intel
Family:	Pentium
Model / Processor Number:	66 MHz

Part number:	A80501-66
S-Spec / Comment:	SX837
Submitted by:	cocoe

General information
Vendor:	GenuineIntel
Processor type:	Original OEM Processor
CPUID signature:	515
Family:	5 (05h)
Model:	1 (01h)
Stepping:	5 (05h)

Instruction set extensions		Additonal instructions

		CMPXCHG8B

Major features		Other features
On-chip Floating Point Unit		Debugging extensions
		Machine check exception
		Model-specific registers
		Page-size extensions (4MB pages)
		Time stamp counter
		Virtual 8086-mode enhancements

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