Atom x5-E3940 vs Celeron 3965U

Place in the ranking	2398	2303
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Celeron	5x Intel Atom
Power efficiency	6.87	11.67
Architecture codename	Kaby Lake-U (2017)	Apollo Lake (2014−2016)
Release date	3 January 2017 (7 years ago)	30 August 2014 (10 years ago)
Launch price (MSRP)	$107	no data

Detailed specifications

Celeron 3965U and Atom x5-E3940 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)	4 (Quad-Core)
Threads	2	4
Base clock speed	2.2 GHz	1.6 GHz
Boost clock speed	2.2 GHz	1.8 GHz
Bus type	OPI	no data
Bus rate	4 GT/s	no data
Multiplier	22	no data
L1 cache	128 KB	56K (per core)
L2 cache	512 KB	2 MB (shared)
L3 cache	2 MB (shared)	0 KB
Chip lithography	14 nm	14 nm
Die size	98.7 mm²	no data
Maximum core temperature	100 °C	no data
Maximum case temperature (TCase)	no data	103 °C
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Celeron 3965U and Atom x5-E3940 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 (Uniprocessor)
Socket	FCBGA1356,FPBGA1356	Intel BGA 1296
Power consumption (TDP)	15 Watt	10 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Celeron 3965U and Atom x5-E3940. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	no data
AES-NI	+	+
AVX	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Speed Shift	+	no data
My WiFi	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Thermal Monitoring	+	-
Flex Memory Access	+	no data
Smart Response	+	no data

Security technologies

Celeron 3965U and Atom x5-E3940 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	no data
Secure Key	+	no data
MPX	+	-
SGX	Yes with Intel® ME	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Celeron 3965U and Atom x5-E3940 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Celeron 3965U and Atom x5-E3940. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3, DDR4	DDR3-1866
Maximum memory size	32 GB	8 GB
Max memory channels	2	no data
Maximum memory bandwidth	34.134 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card Compare	Intel HD Graphics 610	Intel HD Graphics 500
Max video memory	32 GB	no data
Quick Sync Video	+	-
Clear Video	+	no data
Clear Video HD	+	no data
Graphics max frequency	900 MHz	no data

Graphics interfaces

Available interfaces and connections of Celeron 3965U and Atom x5-E3940 integrated GPUs.

Number of displays supported	3	no data
eDP	+	no data
DisplayPort	+	-
HDMI	+	-
DVI	+	no data

Graphics image quality

Maximum display resolutions supported by Celeron 3965U and Atom x5-E3940 integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	no data
Max resolution over HDMI 1.4	4096x2304@24Hz	no data
Max resolution over eDP	4096x2304@60Hz	no data
Max resolution over DisplayPort	4096x2304@60Hz	no data

Graphics API support

APIs supported by Celeron 3965U and Atom x5-E3940 integrated GPUs, sometimes API versions are included.

DirectX	12	no data
OpenGL	4.4	no data

Peripherals

Specifications and connection of peripherals supported by Celeron 3965U and Atom x5-E3940.

PCIe version	2.0	2.0
PCI Express lanes	16	4

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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.

Celeron 3965U 1.13

Atom x5-E3940 1.28
+13.3%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Celeron 3965U 1732

Atom x5-E3940 1953
+12.8%

Gaming performance

Pros & cons summary

Performance score	1.13	1.28
Integrated graphics card	1.85	0.77
Recency	3 January 2017	30 August 2014
Physical cores	2	4
Threads	2	4
Power consumption (TDP)	15 Watt	10 Watt

Celeron 3965U has 140.3% faster integrated GPU, and an age advantage of 2 years.

Atom x5-E3940, on the other hand, has a 13.3% higher aggregate performance score, 100% more physical cores and 100% more threads, and 50% lower power consumption.

The Atom x5-E3940 is our recommended choice as it beats the Celeron 3965U in performance tests.

Should you still have questions on choice between Celeron 3965U and Atom x5-E3940, ask them in Comments section, and we shall answer.