Core details	Athlon 64 FX	Athlon 64 FX	Athlon 64 FX	Athlon 64 FX	Athlon 64 FX	Athlon 64 FX
Development name	Sledgehammer	Clawhammer	San Diego	Toledo	Windsor	Windsor
Construction size (nm)	130	130	90	90	90	90
Transistor count (millions)	105.9	105.9	105.9	232	232	232
Number of processor cores	1	1	1	2	2	2
Registers - ALU (bits)	64	64	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 940	Socket 939	Socket 939	Socket 939	Socket AM2	Socket F
Model Details
Name / Core speed (GHz) 1	FX-51 / 2.2	FX-53 / 2.4	FX-55 / 2.6	FX-60 / 2.6	FX-62 / 2.8	FX-70 / 2.6 2
	FX-53 / 2.4	FX-55 / 2.6	FX-57 / 2.8			FX-72 / 2.8 2
						FX-74 / 3.0 2
HyperTransport Details
CLK speed (MHz)	200	200	200	200	200	200
Data transfer rate (MHz)	1600	2000	2000	2000	2000	2000
Total bus width (bits)	32	32	32	32	32	32
Number of links	1	1	1	1	1	3
Maximum bandwidth (GB/sec)	6.40	8.00	8.00	8.00	8.00	24.00
Integrated Memory Controller Details
Controller width (bits)	128	128	128	128	128	128
Max DRAM CLK speed (MHz)	166	200	200	200	200	200
Controller type	DDR	DDR	DDR	DDR	DDR2	DDR2
Maximum bandwidth (GB/sec)	5.31	6.40	6.40	6.40	12.80	12.80
Cache details
L1 amount (KiB)	128	128	218	128 x 2	128 x 2	128 x 2
L1 location	on-die	on-die	on-die	on-die	on-die	on-die
L1 instruction cache size (KiB)	64	64	64	64 x 2	64 x 2	64 x 2
L1 data cache size (KiB)	64	64	64	64 x 2	64 x 2	64 x 2
L2 amount (KiB)	1024	1024	1024	1024 x 2	1024 x 2	1024 x 2
L2 location	on-die	on-die	on-die	on-die	on-die	on-die
L2 bus width (bits)	128	128	128	128	128	128
Extension support
MMX	Yes	Yes	Yes	Yes	Yes	Yes
3DNow!	Yes	Yes	Yes	Yes	Yes	Yes
SSE	Yes	Yes	Yes	Yes	Yes	Yes
Enhanced 3DNow!	Yes	Yes	Yes	Yes	Yes	Yes
3DNow! Professional	Yes	Yes	Yes	Yes	Yes	Yes
SSE2	Yes	Yes	Yes	Yes	Yes	Yes
SSE3	No	No	Yes	Yes	Yes	Yes
SSSE3	No	No	No	No	No	No
Additional Features
Intel 64	No	No	No	No	No	No
AMD64	Yes	Yes	Yes	Yes	Yes	Yes
HyperThreading	No	No	No	No	No	No
NX Bit	Yes	Yes	Yes	Yes	Yes	Yes
Virtualization Technology	No	No	No	No	Yes	Yes

Notes

1 - All Athlon 64 FX have "unlocked" core speed multipliers

2 - FX-70 models are designed for Quad FX systems and thus are typically sold in pairs

© AMD & Intel CPU Specifications - N D Evanson 2008