Athlon 64 X2 6400+ BE vs Athlon II X4 635

Primary details

Comparing Athlon II X4 635 and Athlon 64 X2 6400+ BE processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2202	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.86	no data
Market segment	Desktop processor	Desktop processor
Power efficiency	1.40	no data
Architecture codename	Propus (2009−2011)	Windsor (2006−2007)
Release date	25 January 2010 (14 years ago)	August 2007 (17 years ago)
Launch price (MSRP)	$70	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Athlon II X4 635 and Athlon 64 X2 6400+ BE 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	4 (Quad-Core)	2 (Dual-core)
Threads	4	2
Base clock speed	2.9 GHz	no data
Boost clock speed	2.9 GHz	3.2 GHz
L1 cache	128 KB (per core)	256 KB
L2 cache	512 KB (per core)	1 MB
L3 cache	0 KB	0 KB
Chip lithography	45 nm	90 nm
Die size	169 mm2	230 mm2
Number of transistors	300 million	227 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	-	+

Compatibility

Information on Athlon II X4 635 and Athlon 64 X2 6400+ BE 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	AM3	AM2
Power consumption (TDP)	95 Watt	125 Watt

Memory specs

Types, maximum amount and channel quantity of RAM supported by Athlon II X4 635 and Athlon 64 X2 6400+ BE. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR3

no data

Peripherals

Specifications and connection of peripherals supported by Athlon II X4 635 and Athlon 64 X2 6400+ BE.

PCIe version

2.0

no data

Pros & cons summary

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Physical cores	4	2
Threads	4	2
Chip lithography	45 nm	90 nm
Power consumption (TDP)	95 Watt	125 Watt

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