Core details	Celeron	Celeron	Celeron	Celeron	Celeron	Celeron	Celeron	Celeron
Development name	Covington	Mendocino	Mendocino	Coppermine	Coppermine	Tualatin	Willamete	Northwood
Construction size (nm)	250	250	250	180	180	130	180	130
Transistor count (millions)	7.5	19	19	28.1	28.1	44	42	55
Number of processor cores	1	1	1	1	1	1	1	1
Registers - ALU (bits)	32	32	32	32	32	32	32	32
Registers - FPU (bits)	80 (64 Ext)	80 (64 Ext)	80 (64 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)
Connection Type	Slot 1	Slot 1	Socket 370	Socket 370	Socket 370	Socket 370	Socket 478	Socket 478
Model Details
Name / Core speed (MHz)	266	300	300	533	800	1000	1700	1800
	300	333	333	566	850	1100	1800	2000
		366	366	600	900	1200		2100
		400	400	633	950	1300		2200
		433	433	667	1000	1400		2300
			466	700	1100			2400
			500	733				2500
			533	766				2600
								2700
								2800
FSB Details
CLK speed (MHz)	66	66	66	66	100	100	100	100
Data transfer rate (MHz)	66	66	66	66	100	100	400	400
Total bus width (bits)	64	64	64	64	64	64	64	64
Maximum bandwidth (GB/sec)	0.53	0.53	0.53	0.53	0.80	0.80	3.20	3.20
Cache details
L1 amount (KiB)	32	32	32	32	32	32	20	20
L1 location	on-die	on-die	on-die	on-die	on-die	on-die	on-die	on-die
L1 instruction cache size (KiB)	16	16	16	16	16	16	12	12
L1 data cache size (KiB)	16	16	16	16	16	16	8	8
L2 amount (KiB)	-	128	128	128	128	256	128	128
L2 location	-	on-die	on-die	on-die	on-die	on-die	on-die	on-die
L2 bus width (bits)	-	64	64	256	256	256	256	256
Extension support
MMX	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
3DNow!	No	No	No	No	No	No	No	No
SSE	No	No	No	Yes	Yes	Yes	Yes	Yes
Enhanced 3DNow!	No	No	No	No	No	No	No	No
3DNow! Professional	No	No	No	No	No	No	No	No
SSE2	No	No	No	No	No	No	Yes	Yes
SSE3	No	No	No	No	No	No	No	No
SSSE3	No	No	No	No	No	No	No	No
Additional Features
Intel 64	No	No	No	No	No	No	No	No
AMD64	No	No	No	No	No	No	No	No
HyperThreading	No	No	No	No	No	No	No	No
NX Bit	No	No	No	No	No	No	No	No
Virtualization Technology	No	No	No	No	No	No	No	No

Core details	Celeron D	Celeron D	Celeron D	Celeron D	Celeron	Celeron
Development name	Prescott	Prescott	Prescott	Cedar Mill	Conroe-L	Allendale
Construction size (nm)	90	90	90	65	65	65
Transistor count (millions)	< 125	< 125	< 125	< 188	~ 110?	~ 170
Number of processor cores	1	1	1	1	1	2
Registers - ALU (bits)	32	32	64	64	64	64
Registers - FPU (bits)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)
Connection Type	Socket 478	LGA 775	LGA 775	LGA 775	LGA 775	LGA 775
Model Details
Name / Core speed (GHz)	310 / 2.13	325J / 2.53	326 / 2.53	347 / 3.07	420 / 1.6	E1200 / 1.6
	315 / 2.27	330J / 2.67	331 / 2.67	352 / 3.20	430 / 1.8	E1400 / 2.0
	320 / 2.40	335J / 2.80	336 / 2.80	356 / 3.33	440 / 2.0
	325 / 2.53	340J / 2.93	341 / 2.93	360 / 3.47
	330 / 2.67	345J / 3.07	346 / 3.07	365 / 3.60
	335 / 2.80		351 / 3.20
	340 / 2.93		355 / 3.33
	345 / 3.07
	350 / 3.20
FSB Details
CLK speed (MHz)	133	133	133	133	200	200
Data transfer rate (MHz)	533	533	533	533	800	800
Total bus width (bits)	64	64	64	64	64	64
Maximum bandwidth (GB/sec)	4.26	4.26	4.26	4.26	6.40	6.40
Cache details
L1 amount (KiB)	28	28	28	28	64	64 x 2
L1 location	on-die	on-die	on-die	on-die	on-die	on-die
L1 instruction cache size (KiB)	12	12	12	12	32	32 x 2
L2 data cache size (KiB)	16	16	16	16	32	32 x 2
L2 amount (KiB)	256	256	256	512	512	512
L2 location	on-die	on-die	on-die	on-die	on-die	on-die
L2 bus width (bits)	256	256	256	256	256	256
Extension support
MMX	Yes	Yes	Yes	Yes	Yes	Yes
3DNow!	No	No	No	No	No	No
SSE	Yes	Yes	Yes	Yes	Yes	Yes
Enhanced 3DNow!	No	No	No	No	No	No
3DNow! Professional	No<