Intel Mobile Pentium III

Intel Mobile Pentium III Features 400-1000 MHz tact 100 MHz FSB 28 Million Transistors 0.18µm fabrication process 0.13µm gates 1.70/1.35 VCore 2x 16 KB L1-Cache 256 KB L2-Cache SpeedStep1, QuickStart, Deep Sleep MMX, SSE instruction sets

Available Types and ThinkPads featuring them

Frequency (MHz)		FSB (MHz)	core Voltage (V)		Power cons.2 (W)		ThinkPad Models
max.	min.		high	low	high	low
Mobile Pentium III
1000	700	100	1.70	1.35	34.0	16.1	A22m, A22p, R30, T22
900	700	100	1.70	1.35	30.7	16.1	A22m, A22p, T22
850	700	100	1.60	1.35	27.5	16.1	A21p, A22e, A22m, T21
800	650	100	1.60	1.35	25.9	15.1	A21m, A22m, T21, T22
750	600	100	1.60	1.35	24.6	14.4	A20p, A21m, i Series 1300, T20, T21
700	550	100	1.60	1.35	23.0	13.2	A20m, A20p, A21m, i Series 1200, i Series 1300 T20
650	500	100	1.60	1.35	21.5	12.2	600X, i Series 1300, T20
600	500	100	1.60	1.35	20.0	12.2	A20m, i Series 1620, S30, S31, TransNote
Mobile Pentium III (Low Voltage)
750	500	100	1.35	1.10	17.2	8.1
700	500	100	1.35	1.10	16.1	8.1	X21
600	500	100	1.35	1.10	14.4	8.1	X20, X21
Mobile Pentium III (Ultra Low Voltage)
600	300	100	1.15	0.975	9.7	4.5
600	300	100	1.10	0.975	9.7	4.5
500	300	100	1.10	0.975	8.1	4.5
Mobile Pentium III - Coppermine
500	-	100	1.60	-	...	-	240X, 390X, 570E, 600X, A20m, i Series 1124, i Series 1483, i Series 1492, i Series 1562, i Series 1592
450	-	100	1.60	-	...	-	390X, 570E, 600X
400	-	100	1.35	-	...	-	390X

GCC Optimization Flags

You should use the following if you have a Mobile Pentium III:

-Os -march=pentium3 -fomit-frame-pointer -pipe

Enable L2 cache

When using a Pentium III MMC2 module in 600E, one needs to activate the L2 cache with the help of a kernel module. See also this post

FOOTNOTES [Δ]

1. SpeedStep was introduced with the 600 MHz models, the 400, 450 and 500 MHz Coppermine models didn't feature SpeedStep.
2. Maximum Thermal Design Power as per Mobile Pentium III data sheet. Typical Thermal Design Power values are about 60% of maximum.