i9-11900K vs Celeron B820

Primary details

Comparing Celeron B820 and Core i9-11900K processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	2833	409
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	19.53
Market segment	Laptop	Desktop processor
Series	Intel Celeron	no data
Architecture codename	Sandy Bridge (2011−2013)	Rocket Lake (2021)
Release date	31 July 2011 (13 years ago)	16 March 2021 (3 years ago)
Launch price (MSRP)	$86	$539

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Celeron B820 and Core i9-11900K 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	2 (Dual-core)	8 (Octa-Core)
Threads	2	16
Base clock speed	1.7 GHz	3.5 GHz
Boost clock speed	1.7 GHz	5.2 GHz
Bus type	DMI 2.0	no data
Bus rate	4 × 5 GT/s	8 GT/s
Multiplier	17	no data
L1 cache	128 KB	80 KB (per core)
L2 cache	512 KB	512 KB (per core)
L3 cache	2 MB	16 MB (shared)
Chip lithography	32 nm	14 nm
Die size	131 mm2	276 mm2
Maximum core temperature	100 °C	100 °C
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	504 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+

Compatibility

Information on Celeron B820 and Core i9-11900K 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 (Uniprocessor)	1
Socket	FCPGA988,PGA988	FCLGA1200
Power consumption (TDP)	35 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Celeron B820 and Core i9-11900K. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI	-	+
FMA	+	-
AVX	-	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
My WiFi	-	no data
Turbo Boost Technology	-	2.0
Hyper-Threading Technology	-	+
TSX	-	+
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	no data
SIPP	-	+
Demand Based Switching	-	no data
Turbo Boost Max 3.0	no data	+
FDI	+	no data
Fast Memory Access	+	no data
Status	Discontinued	Discontinued
Deep Learning Boost	-	+

Security technologies

Celeron B820 and Core i9-11900K technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	+
Secure Key	no data	+
Identity Protection	-	+
SGX	no data	-
OS Guard	no data	+
Anti-Theft	-	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Celeron B820 and Core i9-11900K are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Celeron B820 and Core i9-11900K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4
Maximum memory size	16 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	21.335 GB/s	50 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® HD Graphics for 2nd Generation Intel® Processors	Intel UHD Graphics 750
Max video memory	no data	64 GB
Quick Sync Video	-	+
Clear Video	no data	+
Clear Video HD	-	+
Graphics max frequency	1.05 GHz	1.3 GHz
Execution Units	no data	32
InTru 3D	-	+

Graphics interfaces

Available interfaces and connections of Celeron B820 and Core i9-11900K integrated GPUs.

Number of displays supported	2	3
eDP	+	no data
DisplayPort	+	-
HDMI	+	-
SDVO	+	no data
CRT	+	no data

Graphics image quality

Maximum display resolutions supported by Celeron B820 and Core i9-11900K integrated GPUs, including resolutions over different interfaces.

4K resolution support	no data	+
Max resolution over HDMI 1.4	no data	4096x2160@60Hz
Max resolution over eDP	no data	5120 x 3200 @60Hz
Max resolution over DisplayPort	no data	5120 x 3200 @60Hz

Graphics API support

APIs supported by Celeron B820 and Core i9-11900K integrated GPUs, sometimes API versions are included.

DirectX	no data	12.1
OpenGL	no data	4.5

Peripherals

Specifications and connection of peripherals supported by Celeron B820 and Core i9-11900K.

PCIe version	2.0	4.0
PCI Express lanes	16	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.

Pros & cons summary

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Performance score	0.53	16.38
Recency	31 July 2011	16 March 2021
Physical cores	2	8
Threads	2	16
Chip lithography	32 nm	14 nm
Power consumption (TDP)	35 Watt	125 Watt

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Should you still have questions on choice between Celeron B820 and Core i9-11900K, ask them in Comments section, and we shall answer.

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