FX-8120 vs Core i7-4820K

General info

Comparing Core i7-4820K and FX-8120 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1275	1266
Place by popularity	not in top-100	not in top-100
Value for money	1.23	2.74
Market segment	Desktop processor	Desktop processor
Architecture codename	Ivy Bridge-E (2013)	Zambezi (2011−2012)
Release date	1 September 2013 (10 years ago)	12 October 2011 (12 years ago)
Launch price (MSRP)	$399	no data
Current price	$194 (0.5x MSRP)	$74

Value for money

Performance per price, higher is better.

FX-8120 has 123% better value for money than i7-4820K.

Technical specs

Core i7-4820K and FX-8120 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)	8 (Octa-Core)
Threads	8	8
Base clock speed	3.7 GHz	3.1 GHz
Boost clock speed	3.9 GHz	4 GHz
L1 cache	64 KB (per core)	384 KB
L2 cache	256 KB (per core)	8192 KB
L3 cache	10 MB (shared)	8192 KB
Chip lithography	22 nm	32 nm
Die size	257 mm2	315 mm2
Maximum core temperature	67 °C	61 °C
Number of transistors	1,860 million	1,200 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	Yes	Yes
P0 Vcore voltage	no data	Min: 1.0125 V - Max: 1.4125 V

Compatibility

Information on Core i7-4820K and FX-8120 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	FCLGA2011	AM3+
Power consumption (TDP)	130 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-4820K and FX-8120. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2, Intel® AVX	no data
AES-NI	+	+
FMA	no data	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Thermal Monitoring	+	no data
Smart Response	+	no data
Demand Based Switching	-	no data
Status	Discontinued	no data

Security technologies

Core i7-4820K and FX-8120 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data
Identity Protection	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-4820K and FX-8120 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-4820K and FX-8120. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	64 GB	no data
Max memory channels	4	no data
Maximum memory bandwidth	59.7 GB/s	no data
ECC memory support	-	no data

Peripherals

Specifications and connection of peripherals supported by Core i7-4820K and FX-8120.

PCIe version	3.0	n/a
PCI Express lanes	40	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.

FX-8120 outperforms Core i7-4820K by 1% based on our aggregated benchmark results.

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Advantages and disadvantages

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Performance score	4.22	4.26
Recency	1 September 2013	12 October 2011
Physical cores	4	8
Chip lithography	22 nm	32 nm
Power consumption (TDP)	130 Watt	125 Watt

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Should you still have questions on choice between Core i7-4820K and FX-8120, ask them in Comments section, and we shall answer.

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