Atom Z540 vs Celeron 3865U

Primary details

Comparing Celeron 3865U and Atom Z540 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2578	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Celeron	Intel Atom
Power efficiency	5.21	no data
Architecture codename	Kaby Lake-U (2017)	Silverthorne (2008−2010)
Release date	3 January 2017 (7 years ago)	2 April 2008 (16 years ago)
Launch price (MSRP)	$107	$160

Detailed specifications

Celeron 3865U and Atom Z540 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)	1 (Single-Core)
Threads	2	2
Base clock speed	1.8 GHz	1.86 GHz
Boost clock speed	1.8 GHz	0.07 GHz
Bus type	OPI	FSB
Bus rate	4 GT/s	533.33 MT/s
Multiplier	22	14
L1 cache	128 KB	56 KB
L2 cache	512 KB	512 KB
L3 cache	2 MB (shared)	0 KB
Chip lithography	14 nm	45 nm
Die size	98.7 mm2	24.18 mm2
Maximum core temperature	100 °C	90 °C
Number of transistors	no data	47 Million
64 bit support	+	-
Windows 11 compatibility	-	-
VID voltage range	no data	0.75 -1.1V

Compatibility

Information on Celeron 3865U and Atom Z540 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	PBGA441
Power consumption (TDP)	15 Watt	2.4 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Celeron 3865U and Atom Z540. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	Intel® SSE2, Intel® SSE3, Intel® SSSE3
AES-NI	+	-
AVX	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Speed Shift	+	no data
My WiFi	+	no data
Turbo Boost Technology	-	-
Hyper-Threading Technology	+	+
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	no data
Smart Response	+	no data
Demand Based Switching	no data	+
FSB parity	no data	-

Security technologies

Celeron 3865U and Atom Z540 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	-
EDB	+	+
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 3865U and Atom Z540 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 3865U and Atom Z540. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3, DDR4	no data
Maximum memory size	32 GB	no data
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	Intel HD Graphics 610	-
Max video memory	32 GB	-
Quick Sync Video	+	-
Clear Video	+	-
Clear Video HD	+	-
Graphics max frequency	900 MHz	-

Graphics interfaces

Available interfaces and connections of Celeron 3865U and Atom Z540 integrated GPUs.

Number of displays supported	3	-
eDP	+	-
DisplayPort	+	-
HDMI	+	-
DVI	+	-

Graphics image quality

Maximum display resolutions supported by Celeron 3865U and Atom Z540 integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	-
Max resolution over HDMI 1.4	4096x2304@24Hz	-
Max resolution over eDP	4096x2304@60Hz	-
Max resolution over DisplayPort	4096x2304@60Hz	-

Graphics API support

APIs supported by Celeron 3865U and Atom Z540 integrated GPUs, sometimes API versions are included.

DirectX	12	-
OpenGL	4.4	-

Peripherals

Specifications and connection of peripherals supported by Celeron 3865U and Atom Z540.

PCIe version	2.0	no data
PCI Express lanes	16	no data

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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Pros & cons summary

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Recency	3 January 2017	2 April 2008
Physical cores	2	1
Chip lithography	14 nm	45 nm
Power consumption (TDP)	15 Watt	2 Watt

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