To Open The Sky

The Front Pages of Christopher P. Winter

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Kayak
Computer

Adding a Second CPU to the HP Kayak

A question of power

The table of power levels is illuminating. It reveals that, purely from a power-consumption standpoint, it is better to run a 500MHz Coppermine than a 500MHz Katmai. The latter uses 20 more Watts. Also, an 1100MHz Coppermine uses less power (if only slightly less) than a 600MHz Katmai.

Table of CPU Power Levels
T
Y	Feature	Clock Rate		L2 Cache		CPU	Max CPU
P	Size	(MHz)		Size	Speed	Voltage	Power
E	(microns)	CPU	FSB	(KB)	(L2:CPU)	(Volts)	(Watts)	Notes
Above based on Table 3.25c (p. 146) and Table 3.30 (pp. 158-163) of Mueller. For clarity, I've left out much of the information in those tables. But note the inclusion of stepping (e.g. "cD0") and packaging information for the 866MHz and faster Coppermine variants, where substantial differences in power level make these details important. If no package is indicated, the processor is available in Slot 1 form.
	0.35	233	66	512	1:2	2.80	34.8
	0.35	266	66	512	1:2	2.80	38.2
P	0.35	300	66	512	1:2	2.80	43.0
2	0.25	333	66	512	1:2	2.00	23.7
	0.25	350	66	512	1:2	2.00	21.5
	0.25	400	66	512	1:2	2.00	24.3
	0.25	450	66	512	1:2	2.00	27.1
K	0.25	450	100	512	1:2	2.00	25.3
A	0.25	500	100	512	1:2	2.00	28.0
T	0.25	533	133	512	1:2	2.05	29.7
M	0.25	550	100	512	1:2	2.00	30.8
A	0.25	600	100	512	1:2	2.00	34.5
I	0.25	600	133	512	1:2	2.05	34.5
	0.18	500	100	256	1:1	1.65	13.2
	0.18	533	133	256	1:1	1.65	14.0
	0.18	550	100	256	1:1	1.60	14.5
	0.18	600	100	256	1:1	1.65	15.8
	0.18	600	133	256	1:1	1.65	15.8
	0.18	650	100	256	1:1	1.65	17.0
	0.18	667	133	256	1:1	1.70	17.5
C	0.18	700	100	256	1:1	1.65	18.3
O	0.18	733	133	256	1:1	1.65	19.1
P	0.18	750	100	256	1:1	1.65	19.5
P	0.18	800	100	256	1:1	1.65	20.8
E	0.18	800	133	256	1:1	1.65	20.8
R	0.18	850	100	256	1:1	1.65	22.5
M	0.18	866	133	256	1:1	1.65	22.9	cB0 FC-PGA
I	0.18	866	133	256	1:1	1.70	22.5	cC0 SECC2
N	0.18	866	133	256	1:1	1.75	26.1	cD0 FC-PGA
E	0.18	900	100	256	1:1	1.70	23.2	cC0 FC-PGA OEM only
	0.18	933	133	256	1:1	1.70	25.5	cB0 SECC2
	0.18	933	133	256	1:1	1.70	24.5	cC0 FC-PGA
	0.18	1000	100	256	1:1	1.70	26.1	cC0 SECC2
	0.18	1000	100	256	1:1	1.70	29.0	cC0 FC-PGA OEM only
	0.18	1000	133	256	1:1	1.75	26.1	cB0 SECC2
	0.18	1000	133	256	1:1	1.70	26.1	cC0 SECC2
	0.18	1000	133	256	1:1	1.75	29.0	cD0 FC-PGA
	0.18	1100	100	256	1:1	1.75	33.0	cC0 FC-PGA OEM only