Athlon II X4 651 vs i7-920

Primary details

Comparing Core i7-920 and Athlon II X4 651 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2026	1830
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.22	no data
Market segment	Desktop processor	Desktop processor
Series	Core i7 (Desktop)	no data
Power efficiency	1.30	2.14
Architecture codename	Bloomfield (2008−2010)	Llano (2011−2012)
Release date	November 2008 (16 years ago)	14 November 2011 (13 years ago)
Launch price (MSRP)	$340	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-920 and Athlon II X4 651 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)	4 (Quad-Core)
Threads	8	4
Base clock speed	2.66 GHz	3 GHz
Boost clock speed	2.93 GHz	3 GHz
Bus rate	1333 MHz	no data
L1 cache	64 KB (per core)	128 KB (per core)
L2 cache	256 KB (per core)	1 MB (per core)
L3 cache	8 MB (shared)	0 KB
Chip lithography	45 nm	32 nm
Die size	263 mm2	228 mm2
Maximum core temperature	68 °C	no data
Number of transistors	731 million	1,178 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Core i7-920 and Athlon II X4 651 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	FCLGA1366,PLGA1366	FM1
Power consumption (TDP)	130 Watt	100 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-920 and Athlon II X4 651. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	no data
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	1.0	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Demand Based Switching	-	no data
PAE	36 Bit	no data

Security technologies

Core i7-920 and Athlon II X4 651 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 Core i7-920 and Athlon II X4 651 are enumerated here.

AMD-V	-	+
VT-x	+	no data
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-920 and Athlon II X4 651. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	24 GB	no data
Max memory channels	3	no data
Maximum memory bandwidth	25.6 GB/s	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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Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

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Pros & cons summary

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Performance score	1.79	2.26
Threads	8	4
Chip lithography	45 nm	32 nm
Power consumption (TDP)	130 Watt	100 Watt

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Should you still have questions on choice between Core i7-920 and Athlon II X4 651, ask them in Comments section, and we shall answer.

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