Intel Pentium M (Dothan)

The Pentium M "Dothan" is the second generation Pentium M processor. The fabrication process was reduced to 90 nm and the L2-Cache was doubled to 2 MB. The second revision of Dothan Pentium M processors features a 533 MHz FSB and accompanies the Sonoma Centrino platform. Features 1.0 - 2.26 GHz clock speed 400/533 MHz FSB 140 Million Transistors 90 nm fabrication process 2 MB L2-Cache (Enhanced) EIST, Deeper Sleep XD-Bit (on most models) MMX, SSE, SSE2 instruction sets

Available Types and ThinkPads featuring them

Nr.	Frequency (MHz)		FSB (MHz)	XD-Bit	core Voltage (V)		TDP (W)		ThinkPad Models
	max.	min.			high	low	high	low
Pentium M
780	2266	800	533	•	1.372	...	27	11	R52, T43. T43p
770	2133	800	533	•	1.372	0.988	27	11	R52, T43, T43p
765	2100	600	400		1.34	0.988	21	8	T42p
760	2000	800	533	•	1.372	0.988	27	11	R51e, R52, T43, T43p, Z60m, Z60t
755	2000	600	400		1.34	0.988	21	8	T42p, X32
750	1866	800	533	•	1.372	0.988	27	11	R51e, R52, T43, T43p, Z60m, Z60t
745	1800	600	400		1.34	0.988	21	8	T42, T42p, X32, R51
740	1733	800	533	•	1.372	0.988	27	11	R51e, R52, T43, Z60m, Z60t
735	1700	600	400		1.34	0.988	21	8	R50e, R51, T42, X32
730	1600	800	533	•	1.372	0.988	27	11	R51e, T43
725a	1600	600	400		...	...	...	...	R50e, R51, R52
725	1600	600	400		1.34	0.988	21	8	R50e, R51, T42, X32
715a	1500	600	400		...	...	...	...	R50e, R51
715	1500	600	400		1.34	0.988	21	8	R50e, R51
710	1400	...	400		...	...	...	...	R50e, R51
Pentium M (Low Voltage)
778	1600	...	400	•	1.116	...	10	...	X40, X41, X41 Tablet
758	1500	600	400	•	1.116	0.988	7.5	...	X40, X41, X41 Tablet
738	1400	...	400		1.116	0.988	10	...	X40
Pentium M (Ultra Low Voltage)
773	1300	...	400	•	...	...	...	...
753	1200	...	400	•	0.940	0.812	5	...	X41 Tablet
733J	1100	...	400	•	....	...	...	...
733	1100	...	400		0.940	0.812	5	...	X40
723	1000	...	400		0.940	0.812	5	...

Thermal Specifications

The max. Core Temperature is 100°C.

GCC Optimization Flags

You should use the following for GCC version 3.4.4 and later if you have a Pentium M:

-Os -march=pentium-m -pipe

For GCC version 3.3.5 and earlier use the following:

-Os -march=pentium3 -msse2 -pipe

Also, if you don't plan to use debugging information, then you can safely add the following to either of the above for a possible performance improvement:

-fomit-frame-pointer

Physical Address Extension (PAE)

Most modern Linux distributions use PAE kernels which will fail to boot if this feature is not present in the CPU. The Dothan core is said to support PAE even though it doesn't report the feature to the operating system. As a workaround, kernel parameter forcepae can be used to successfully use PAE-kernels on any Dothan core.

All second generation Dothan models with a 533 MHz FSB and some newer model first generation Dothan cores with a 400 MHz FSB do report PAE and NX in their CPU flags. All others must use the workaround.

Note: As a direct result, when the CPU flag PAE and NX is not reported, 32-Bit-Windows starting with Windows 8 will also not run (Windows doesn't have a forcepae option), leaving 32-Bit Windows 7 the last supported Windows operating system on Pentium M CPUs before the second generation Dothan core.

See also

• Intel Pentium M (Banias)
• Intel Core Duo (Yonah)
• Pentium M undervolting and underclocking