Athlon II X4 645 vs i7-920

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Aggregate performance score

Core i7-920
2008
4 cores / 8 threads, 130 Watt
1.79
+20.9%
Athlon II X4 645
2010
4 cores / 4 threads, 95 Watt
1.48

Core i7-920 outperforms Athlon II X4 645 by a significant 21% based on our aggregate benchmark results.

Primary details

Comparing Core i7-920 and Athlon II X4 645 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking20252167
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation1.223.30
Market segmentDesktop processorDesktop processor
SeriesCore i7 (Desktop)no data
Power efficiency1.301.47
Architecture codenameBloomfield (2008−2010)Propus (2009−2011)
Release dateNovember 2008 (16 years ago)21 September 2010 (14 years ago)
Launch price (MSRP)$340$80

Cost-effectiveness evaluation

Performance per price, higher is better.

Athlon II X4 645 has 170% better value for money than i7-920.

Detailed specifications

Core i7-920 and Athlon II X4 645 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 cores4 (Quad-Core)4 (Quad-Core)
Threads84
Base clock speed2.66 GHz3.1 GHz
Boost clock speed2.93 GHz3.1 GHz
Bus rate1333 MHzno data
L1 cache64 KB (per core)128 KB (per core)
L2 cache256 KB (per core)512 KB (per core)
L3 cache8 MB (shared)0 KB
Chip lithography45 nm45 nm
Die size263 mm2169 mm2
Maximum core temperature68 °Cno data
Number of transistors731 million300 million
64 bit support++
Windows 11 compatibility--

Compatibility

Information on Core i7-920 and Athlon II X4 645 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 configuration11
SocketFCLGA1366,PLGA1366AM3
Power consumption (TDP)130 Watt95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-920 and Athlon II X4 645. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.2no data
Enhanced SpeedStep (EIST)+no data
Turbo Boost Technology1.0no data
Hyper-Threading Technology+no data
Idle States+no data
Demand Based Switching-no data
PAE36 Bitno data

Security technologies

Core i7-920 and Athlon II X4 645 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 645 are enumerated here.

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 645. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR3
Maximum memory size24 GBno data
Max memory channels3no data
Maximum memory bandwidth25.6 GB/sno data

Peripherals

Specifications and connection of peripherals supported by Core i7-920 and Athlon II X4 645.

PCIe versionno data2.0

Synthetic benchmark performance

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


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.

i7-920 1.79
+20.9%
Athlon II X4 645 1.48

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

i7-920 2840
+20.8%
Athlon II X4 645 2351

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

i7-920 415
+29.7%
Athlon II X4 645 320

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

i7-920 1426
+47.2%
Athlon II X4 645 969

Gaming performance

Pros & cons summary


Performance score 1.79 1.48
Threads 8 4
Power consumption (TDP) 130 Watt 95 Watt

i7-920 has a 20.9% higher aggregate performance score, and 100% more threads.

Athlon II X4 645, on the other hand, has 36.8% lower power consumption.

The Core i7-920 is our recommended choice as it beats the Athlon II X4 645 in performance tests.


Should you still have questions on choice between Core i7-920 and Athlon II X4 645, ask them in Comments section, and we shall answer.

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Intel Core i7-920
Core i7-920
AMD Athlon II X4 645
Athlon II X4 645

Similar processor comparisons

We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.

Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


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Questions & comments

Here you can ask a question about Core i7-920 or Athlon II X4 645, agree or disagree with our judgements, or report an error or mismatch.