Athlon 64 FX-55 vs Pentium 4 660

Primary details

Comparing Pentium 4 660 and Athlon 64 FX-55 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	3206	3160
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Series	Pentium 4	no data
Power efficiency	0.17	0.23
Architecture codename	Prescott 2M	Clawhammer (2001−2005)
Release date	no data	10 October 2004 (20 years ago)
Launch price (MSRP)	no data	$180

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Pentium 4 660 and Athlon 64 FX-55 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	1 (Single-Core)	1 (Single-Core)
Threads	1	1
Base clock speed	3.6 GHz	2.6 GHz
Boost clock speed	3.6 GHz	2.6 GHz
Bus rate	800 MHz	no data
L1 cache	no data	128 KB
L2 cache	no data	1 MB
L3 cache	2 MB L2 Cache	0 KB
Chip lithography	90 nm	130 nm
Die size	no data	193 mm2
Maximum core temperature	71 °C	no data
Maximum case temperature (TCase)	no data	63 °C
Number of transistors	no data	105 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	-	+
VID voltage range	1.2V-1.4V	no data

Compatibility

Information on Pentium 4 660 and Athlon 64 FX-55 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	no data	1
Socket	PLGA775,PPGA775	939
Power consumption (TDP)	115 Watt	104 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium 4 660 and Athlon 64 FX-55. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Thermal Monitoring	+	-
Demand Based Switching	-	no data
FSB parity	-	no data

Security technologies

Pentium 4 660 and Athlon 64 FX-55 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium 4 660 and Athlon 64 FX-55 are enumerated here.

VT-x

-

no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium 4 660 and Athlon 64 FX-55. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

no data

DDR1 Depends on motherboard

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

On certain motherboards (Chipset feature)

Pros & cons summary

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Performance score	0.21	0.25
Chip lithography	90 nm	130 nm
Power consumption (TDP)	115 Watt	104 Watt

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Should you still have questions on choice between Pentium 4 660 and Athlon 64 FX-55, ask them in Comments section, and we shall answer.

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