Intel Core i7-6800K vs Intel Celeron 3965U

Last updated: 2024-04-15

CPU comparison with benchmarks


Intel Core i7-6800K		Intel Celeron 3965U
CPU comparison Intel Core i7-6800K or Intel Celeron 3965U - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results. The Intel Core i7-6800K has 6 cores with 12 threads and clocks with a maximum frequency of 3.60 GHz. Up to 128 GB of memory is supported in 4 memory channels. The Intel Core i7-6800K was released in Q2/2016. The Intel Celeron 3965U has 2 cores with 2 threads and clocks with a maximum frequency of 2.20 GHz. The CPU supports up to 32 GB of memory in 2 memory channels. The Intel Celeron 3965U was released in Q1/2017.

Intel Core i7 Extreme Edition (24)	Family	Intel Celeron (165)
Intel Core i 6000 (24)	CPU group	Intel Celeron 3000 (10)
6	Generation	7
Skylake S	Architecture	Kaby Lake U
Desktop / Server	Segment	Mobile
--	Predecessor	--
--	Successor	--

CPU Cores and Base Frequency The Intel Core i7-6800K is a 6 core processor with a clock frequency of 3.40 GHz (3.60 GHz). The Intel Celeron 3965U has 2 CPU cores with a clock frequency of 2.20 GHz.
Intel Core i7-6800K	Characteristic	Intel Celeron 3965U
6	Cores	2
12	Threads	2
normal	Core architecture	normal
Yes	Hyperthreading	No
Yes	Overclocking ?	No
3.40 GHz	Frequency	2.20 GHz
3.60 GHz	Turbo Frequency (1 Core)	--
--	Turbo Frequency (All Cores)	--


NPU AI performance The performance values of the processor's AI unit. The isolated NPU performance is specified here, the total AI performance (NPU+CPU+iGPU) can be higher. Processors with support for artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors.
Intel Core i7-6800K	Characteristic	Intel Celeron 3965U
--	AI hardware	--
--	AI specifications	--
--	NPU + CPU + iGPU	--

Integrated graphics (iGPU) The integrated graphics unit of a processor is not only responsible for the pure image output on the system, but can also significantly increase the efficiency of the system with the support of modern video codecs.
no iGPU	GPU	Intel HD Graphics 610
	GPU frequency	0.30 GHz
--	GPU (Turbo)	0.90 GHz
--	GPU Generation	9.5
	Technology	14 nm
	Max. displays	3
--	Compute units	12
--	Shader	96
No	Hardware Raytracing	No
No	Frame Generation	No
--	Max. GPU Memory	32 GB
--	DirectX Version	12

Hardware codec support A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.
no iGPU	GPU	Intel HD Graphics 610
No	Codec h265 / HEVC (8 bit)	Decode / Encode
No	Codec h265 / HEVC (10 bit)	Decode / Encode
No	Codec h264	Decode / Encode
No	Codec VP9	Decode / Encode
No	Codec VP8	Decode / Encode
No	Codec AV1	No
No	Codec AVC	Decode / Encode
No	Codec VC-1	Decode
No	Codec JPEG	Decode / Encode

Memory & PCIe The Intel Core i7-6800K supports a maximum of 128 GB of memory in 4 memory channels. The Intel Celeron 3965U can connect up to 32 GB of memory in 2 memory channels.
Intel Core i7-6800K	Characteristic	Intel Celeron 3965U
DDR4-2400	Memory	LPDDR3-1866, DDR4-2133, DDR3L-1600
128 GB	Max. Memory	32 GB
4 (Quad Channel)	Memory channels	2 (Dual Channel)
76.8 GB/s	Max. Bandwidth	34.1 GB/s
No	ECC	No
--	L2 Cache	--
15.00 MB	L3 Cache	2.00 MB
3.0	PCIe version	2.0
28	PCIe lanes	10
27.6 GB/s	PCIe Bandwidth	5.0 GB/s
Thermal Management The TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Intel Core i7-6800K has a TDP of 140 W, that of the Intel Celeron 3965U is 15 W.
Intel Core i7-6800K	Characteristic	Intel Celeron 3965U
140 W	TDP (PL1 / PBP)	15 W
--	TDP (PL2)	--
--	TDP up	--
--	TDP down	10 W
100 °C	Tjunction max.	100 °C
Technical details The Intel Core i7-6800K has a 15.00 MB cache, while the Intel Celeron 3965U cache has a total of 2.00 MB.

Intel Core i7-6800K	Characteristic	Intel Celeron 3965U
14 nm	Technology	14 nm
Monolithic	Chip design	Monolithic
x86-64 (64 bit)	Instruction set (ISA)	x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2	ISA extensions	SSE4.1, SSE4.2
LGA 2011-3	Socket	BGA 1356
VT-x, VT-x EPT, VT-d	Virtualization	VT-x, VT-x EPT, VT-d
Yes	AES-NI	Yes
Windows 10, Linux	Operating systems	Windows 10, Linux
Q2/2016	Release date	Q1/2017
628 $	Release price	107 $

show more data		show more data

Intel Core i7-6800K 6C 12T @ 3.40 GHz (3.60 GHz) buy now on Amazon and save! Intel Celeron 3965U 2C 2T @ 2.20 GHz buy now on Amazon and save!

Rate these processors

Average performance in benchmarks

⌀ Single core performance in 2 CPU benchmarks

Intel Core i7-6800K (100%)

Intel Celeron 3965U (45%)

⌀ Multi core performance in 3 CPU benchmarks

Intel Core i7-6800K (100%)

Intel Celeron 3965U (16%)

Geekbench 5, 64bit (Single-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.


	Intel Core i7-6800K 6C 12T @ 3.60 GHz	1080 (100%)
	Intel Celeron 3965U 2C 2T @ 2.20 GHz	560 (52%)

Geekbench 5, 64bit (Multi-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.


	Intel Core i7-6800K 6C 12T @ 3.40 GHz	6314 (100%)
	Intel Celeron 3965U 2C 2T @ 2.20 GHz	1084 (17%)

Geekbench 6 (Single-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.


	Intel Core i7-6800K 6C 12T @ 3.60 GHz	1267 (100%)
	Intel Celeron 3965U 2C 2T @ 2.20 GHz	469 (37%)

Geekbench 6 (Multi-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.


	Intel Core i7-6800K 6C 12T @ 3.40 GHz	5960 (100%)
	Intel Celeron 3965U 2C 2T @ 2.20 GHz	832 (14%)

Estimated results for PassMark CPU Mark

Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.


	Intel Core i7-6800K 6C 12T @ 3.40 GHz	10752 (100%)
	Intel Celeron 3965U 2C 2T @ 2.20 GHz	1732 (16%)

Cinebench R23 (Single-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.


	Intel Core i7-6800K 6C 12T @ 3.60 GHz	949 (100%)
	Intel Celeron 3965U 2C 2T @ 2.20 GHz	0 (0%)

Cinebench R23 (Multi-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.


	Intel Core i7-6800K 6C 12T @ 3.40 GHz	6645 (100%)
	Intel Celeron 3965U 2C 2T @ 2.20 GHz	0 (0%)

iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.


	Intel Core i7-6800K @ 0.00 GHz	0 (0%)
	Intel Celeron 3965U Intel HD Graphics 610 @ 0.90 GHz	173 (100%)

CPU-Z Benchmark 17 (Multi-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.


	Intel Core i7-6800K 6C 12T @ 3.40 GHz	3194 (100%)
	Intel Celeron 3965U 2C 2T @ 2.20 GHz	0 (0%)

Cinebench R15 (Single-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.


	Intel Core i7-6800K 6C 12T @ 3.60 GHz	0 (0%)
	Intel Celeron 3965U 2C 2T @ 2.20 GHz	86 (100%)

Cinebench R15 (Multi-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.


	Intel Core i7-6800K 6C 12T @ 3.40 GHz	0 (0%)
	Intel Celeron 3965U 2C 2T @ 2.20 GHz	168 (100%)

Devices using this processor
Intel Core i7-6800K	Intel Celeron 3965U
Unknown	Unknown

Popular comparisons containing this CPUs


1.		Intel Celeron 3965U vs Intel Celeron J1900
2.		Intel Celeron J4125 vs Intel Celeron 3965U
3.		Intel Celeron 3865U vs Intel Celeron 3965U
4.		AMD Ryzen 5 3600 vs Intel Core i7-6800K
5.		Intel Celeron 3965U vs Intel Core i3-7100U
6.		Intel Core i7-6700K vs Intel Core i7-6800K
7.		Intel Celeron 3965U vs Intel Core i5-6300U
8.		AMD Ryzen 7 5800X vs Intel Core i7-6800K
9.		Intel Core i7-6800K vs Apple M1
10.		Intel Core i7-6800K vs Intel Core i7-10700K