Intel Core 2 Quad Q8400 vs AMD Phenom II X4 920

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Combined performance score

Phenom II X4 920
1.44
+6.7%

Phenom II X4 920 outperforms Core 2 Quad Q8400 by 7% in our combined benchmark results.

General info

Comparing Phenom II X4 920 and Core 2 Quad Q8400 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking20622111
Place by popularitynot in top-100not in top-100
Value for money4.492.73
Market segmentDesktop processorDesktop processor
Architecture codenameDeneb (2009−2011)Yorkfield (2007−2009)
Release dateJanuary 2009 (15 years old)April 2009 (14 years old)
Launch price (MSRP)$90no data
Current price$43 (0.5x MSRP)$58
Value for money

Performance per price, higher is better.

Phenom II X4 920 has 64% better value for money than Core 2 Quad Q8400.

Technical specs

Phenom II X4 920 and Core 2 Quad Q8400 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)
Threads44
Base clock speedno data2.66 GHz
Boost clock speed2.8 GHz2.67 GHz
L1 cache128 KB (per core)64K (per core)
L2 cache512 KB (per core)4 MB (shared)
L3 cache6 MB (shared)0 KB
Chip lithography45 nm45 nm
Die size258 mm22x 81 mm2
Maximum core temperatureno data71 °C
Maximum case temperature (TCase)no data71 °C
Number of transistors758 million456 million
64 bit support++
Windows 11 compatibility--
Unlocked multiplierNoNo
VID voltage rangeno data0.85V-1.3625V

Compatibility

Information on Phenom II X4 920 and Core 2 Quad Q8400 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
SocketAM3FCLGA775,LGA775
Power consumption (TDP)125 Watt95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Phenom II X4 920 and Core 2 Quad Q8400. You'll probably need this information if you require some particular technology.

AES-NIno data-
Enhanced SpeedStep (EIST)no data+
Turbo Boost Technologyno data-
Hyper-Threading Technologyno data-
Idle Statesno data+
Thermal Monitoringno data+
Demand Based Switchingno data-
FSB parityno data-
Statusno dataDiscontinued

Security technologies

Phenom II X4 920 and Core 2 Quad Q8400 technologies aimed at improving security, for example, by protecting against hacks.

TXTno data-
EDBno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Phenom II X4 920 and Core 2 Quad Q8400 are enumerated here.

VT-xno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Phenom II X4 920 and Core 2 Quad Q8400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR1, DDR2, DDR3

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.

Phenom II X4 920 1.44
+6.7%
Core 2 Quad Q8400 1.35

Phenom II X4 920 outperforms Core 2 Quad Q8400 by 7% in our combined benchmark results.


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.

Benchmark coverage: 68%

Phenom II X4 920 2209
+6.6%
Core 2 Quad Q8400 2073

Phenom II X4 920 outperforms Core 2 Quad Q8400 by 7% in Passmark.

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.

Benchmark coverage: 42%

Phenom II X4 920 350
+6.1%
Core 2 Quad Q8400 330

Phenom II X4 920 outperforms Core 2 Quad Q8400 by 6% in GeekBench 5 Single-Core.

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.

Benchmark coverage: 42%

Phenom II X4 920 1097
+18.3%
Core 2 Quad Q8400 927

Phenom II X4 920 outperforms Core 2 Quad Q8400 by 18% in GeekBench 5 Multi-Core.

Gaming performance

Advantages and disadvantages


Performance score 1.44 1.35
Power consumption (TDP) 125 Watt 95 Watt

We couldn't decide between Phenom II X4 920 and Core 2 Quad Q8400. The differences in performance seem too small.


Should you still have questions on choice between Phenom II X4 920 and Core 2 Quad Q8400, ask them in Comments section, and we shall answer.

User ratings

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


AMD Phenom II X4 920
Phenom II X4 920
Intel Core 2 Quad Q8400
Core 2 Quad Q8400

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User ratings: view and submit

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Questions and comments

Here you can ask a question about Phenom II X4 920 or Core 2 Quad Q8400, agree or disagree with our judgements, or report an error or mismatch.