Ryzen 9 7945HX vs i7-3820

Primary details

Comparing Core i7-3820 and Ryzen 9 7945HX processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1490	110
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.32	no data
Market segment	Desktop processor	Laptop
Power efficiency	2.64	59.28
Architecture codename	Sandy Bridge-E (2011−2013)	Dragon Range-HX (Zen 4) (2023−2024)
Release date	February 2012 (12 years ago)	4 January 2023 (1 year ago)
Launch price (MSRP)	$400	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-3820 and Ryzen 9 7945HX 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)	16 (Hexadeca-Core)
Threads	8	32
Base clock speed	3.6 GHz	2.5 GHz
Boost clock speed	3.8 GHz	5.4 GHz
Bus rate	5 GT/s	no data
L1 cache	64 KB (per core)	64K (per core)
L2 cache	256 KB (per core)	1 MB (per core)
L3 cache	10240 KB (shared)	64 MB (shared)
Chip lithography	32 nm	CCD = 5 nm, I/O = 6 nm
Die size	294 mm2	2x 71 mm2
Maximum core temperature	no data	100 °C
Maximum case temperature (TCase)	67 °C	no data
Number of transistors	1270 million	13,140 million
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+

Compatibility

Information on Core i7-3820 and Ryzen 9 7945HX 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	FL1
Power consumption (TDP)	130 Watt	55 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-3820 and Ryzen 9 7945HX. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2, Intel® AVX	MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME
AES-NI	+	+
FMA	-	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Thermal Monitoring	+	-
Smart Response	+	no data
Demand Based Switching	-	no data
Precision Boost 2	no data	+

Security technologies

Core i7-3820 and Ryzen 9 7945HX technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-3820 and Ryzen 9 7945HX are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-3820 and Ryzen 9 7945HX. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR5
Maximum memory size	64.23 GB	no data
Max memory channels	4	no data
Maximum memory bandwidth	51.2 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

AMD Radeon 610M

Peripherals

Specifications and connection of peripherals supported by Core i7-3820 and Ryzen 9 7945HX.

PCIe version	2.0	5.0
PCI Express lanes	40	28

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	3.63	34.41
Physical cores	4	16
Threads	8	32
Power consumption (TDP)	130 Watt	55 Watt

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Should you still have questions on choice between Core i7-3820 and Ryzen 9 7945HX, ask them in Comments section, and we shall answer.

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