Athlon 64 FX-51 vs Celeron 420

General info

Comparing Celeron 420 and Athlon 64 FX-51 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	not rated	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Architecture codename	Conroe-L (2007−2008)	SledgeHammer (2003−2004)
Release date	June 2007 (16 years old)	September 2003 (20 years old)
Launch price (MSRP)	$23	no data
Current price	$33 (1.4x MSRP)	$30

Technical specs

Celeron 420 and Athlon 64 FX-51 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	1.6 GHz	no data
Boost clock speed	1.6 GHz	2.2 GHz
L1 cache	64 KB	128 KB
L2 cache	512 KB	1 MB
L3 cache	0 KB	0 KB
Chip lithography	65 nm	130 nm
Die size	77 mm2	193 mm2
Maximum core temperature	60 °C	no data
Maximum case temperature (TCase)	60 °C	no data
Number of transistors	105 million	105 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No
VID voltage range	1V-1.3375V	no data

Compatibility

Information on Celeron 420 and Athlon 64 FX-51 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	1	1
Socket	LGA775	940
Power consumption (TDP)	35 Watt	89 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Celeron 420 and Athlon 64 FX-51. You'll probably need this information if you require some particular technology.

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

Security technologies

Celeron 420 and Athlon 64 FX-51 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 Celeron 420 and Athlon 64 FX-51 are enumerated here.

VT-d	-	no data
VT-x	-	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Celeron 420 and Athlon 64 FX-51. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2, DDR3

no data

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Advantages and disadvantages

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Chip lithography	65 nm	130 nm
Power consumption (TDP)	35 Watt	89 Watt

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Should you still have questions on choice between Celeron 420 and Athlon 64 FX-51, ask them in Comments section, and we shall answer.

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