Ultra 7 265K vs i7-3820

Primary details

Comparing Core i7-3820 and Core Ultra 7 265K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1490	86
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.32	89.87
Market segment	Desktop processor	Desktop processor
Power efficiency	2.64	28.22
Architecture codename	Sandy Bridge-E (2011−2013)	Arrow Lake-S (2024−2025)
Release date	February 2012 (12 years ago)	24 October 2024 (less than a year ago)
Launch price (MSRP)	$400	$394

Cost-effectiveness evaluation

Performance per price, higher is better.

Ultra 7 265K has 3774% better value for money than i7-3820.

Detailed specifications

Core i7-3820 and Core Ultra 7 265K 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)	20 (Icosa-Core)
Threads	8	20
Base clock speed	3.6 GHz	3.9 GHz
Boost clock speed	3.8 GHz	5.5 GHz
Bus rate	5 GT/s	no data
L1 cache	64 KB (per core)	112 KB (per core)
L2 cache	256 KB (per core)	3 MB (per core)
L3 cache	10240 KB (shared)	30 MB (shared)
Chip lithography	32 nm	3 nm
Die size	294 mm2	243 mm2
Maximum case temperature (TCase)	67 °C	no data
Number of transistors	1270 million	17,800 million
64 bit support	+	+
Windows 11 compatibility	-	no data
Unlocked multiplier	-	+

Compatibility

Information on Core i7-3820 and Core Ultra 7 265K 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	1851
Power consumption (TDP)	130 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-3820 and Core Ultra 7 265K. You'll probably need this information if you require some particular technology.

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

Security technologies

Core i7-3820 and Core Ultra 7 265K technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	no data
Identity Protection	+	-

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-3820 and Core Ultra 7 265K are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-3820 and Core Ultra 7 265K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR5 Depends on motherboard
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

Arc Xe2 Graphics 64EU

Peripherals

Specifications and connection of peripherals supported by Core i7-3820 and Core Ultra 7 265K.

PCIe version	2.0	5.0
PCI Express lanes	40	20

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	37.27
Physical cores	4	20
Threads	8	20
Chip lithography	32 nm	3 nm
Power consumption (TDP)	130 Watt	125 Watt

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Should you still have questions on choice between Core i7-3820 and Core Ultra 7 265K, ask them in Comments section, and we shall answer.

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