Intel Pentium II 266 - 80522PX266512 (B80522P266512)


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CPU Information

General information
Type	CPU / Microprocessor
Family	Intel Pentium II
CPU part number	80522PX266512 (SL265, SL2HC)
Box part number	B80522P266512 (SL28L, SL2QB)
Frequency (MHz) ?	266
Bus speed (MHz) ?	66
Clock multiplier ?	4
Package	Single Edge Contact Cartridge 5.505" x 2.473" x 0.647" (13.98 cm x 6.28 cm x 1.64 cm)
Socket	Slot 1
Introduction date	7-May-97
Price at introduction	$775

Architecture / Microarchitecture
Core steppings	C0 (SL265, SL28L) C1 (SL2HC, SL2QB)
Manufacturing process	0.35 micron, 7.5 million transistors
Data width	32 (64 bit data bus) bit
Floating Point Unit	Integrated
Level 1 cache size ?	16 KB code 16 KB data
Level 2 cache size ?	512 KB unified cache running at 1/2 of processor frequency
Low power features	AutoHALT state ? Stop Grant state ? Sleep state ? Deep Sleep state ? System Management Mode

Electrical/Thermal parameters
V core (V) ?	2.8
Maximum operating temperature (°C) ?	75
Maximum power dissipation (W) ?	38.2

Pictures (2)


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Front view
266 MHz 512 KB L2 cache Single Edge Contact cartridge (slot 1) Front view Image reduced 2x times
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Benchmarks

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Tested processor
CPU ID:	0634h
CPU vendor string:	GenuineIntel

Motherboard ASUS P2B-S (PC-DOS)
Dhrystone 2.1 (VAX MIPS)	265.18
Doom 1.9s high detail (FPS)	76.82
Doom 1.9s low detail (FPS)	125.53
Linpack 100x100 (MFLOPS)	60.26
Whetstone (KWIPS)	142.39

Motherboard ASUS P2B-S (Win98)
Sandra Dhrystone (MIPS)	910
Sandra MultiMedia Floating Point (it/s)	662
Sandra MultiMedia Integer (it/s)	1755
Sandra Whetstone (MFLOPS)	354

Comments (2)

83 MHz FSB with PC66 RAM also possible

2009-09-18 05:26:56

Posted by: NNH

In addition to 100 MHz FSB setting with PC100 RAM mentioned in previous comment, this CPU also works flawlessly @ 4x 83 MHz setting with PC66 RAM, resulting in 333 MHz speed. Tested with Asus P2L97 motherboard with 440LX chipset (100 MHz FSB setting is not available).

overclockability 400mhz

2007-09-17 00:02:41

Posted by: Corsfar

The PII 266 cpu will run stable no problem running @100fsb if your motherboard has the option to switch from 66fsb to 100fsb using 100mhz sdram,the multiplier is locked @ 4x,this cpu runs unstable over 412mhz,this is a well known overclock ,this is the same chip as a 66fsb 400mhz version,luckily the 512kb cache can handle operating @100fsb,the cache has a speed limitation of running up to 200mhz 1/2 cpu speed(making this possible).This gives the cpu a real performance boost,operating at near PIII performance due to the 100fsb overclock.(adding a cpu fan to the heatsink is recommended)

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