Ultra 5 245KF vs Celeron 3955U

Primary details

Comparing Celeron 3955U and Core Ultra 5 245KF processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2525	177
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	81.98
Market segment	Laptop	Desktop processor
Series	Intel Celeron	no data
Power efficiency	5.87	20.86
Architecture codename	Skylake (2015−2016)	Arrow Lake-S (2024−2025)
Release date	15 August 2015 (9 years ago)	24 October 2024 (less than a year ago)
Launch price (MSRP)	$107	$294

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Celeron 3955U and Core Ultra 5 245KF 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)	14 (Tetradeca-Core)
Threads	2	14
Base clock speed	2 GHz	4.2 GHz
Boost clock speed	2 GHz	5.2 GHz
Bus type	OPI	no data
Bus rate	4 GT/s	no data
Multiplier	20	no data
L1 cache	128 KB	112 KB (per core)
L2 cache	512 KB	3 MB (per core)
L3 cache	2 MB	24 MB (shared)
Chip lithography	14 nm	3 nm
Die size	98.57 mm2	243 mm2
Maximum core temperature	100 °C	no data
Number of transistors	1750 Million	17,800 million
64 bit support	+	+
Windows 11 compatibility	-	no data

Compatibility

Information on Celeron 3955U and Core Ultra 5 245KF 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	FCBGA1356	1851
Power consumption (TDP)	15 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Celeron 3955U and Core Ultra 5 245KF. 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	-	+
Enhanced SpeedStep (EIST)	+	+
My WiFi	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
TSX	-	+
Idle States	+	no data
Thermal Monitoring	+	-
Flex Memory Access	+	no data
Smart Response	+	no data

Security technologies

Celeron 3955U and Core Ultra 5 245KF technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Celeron 3955U and Core Ultra 5 245KF are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Celeron 3955U and Core Ultra 5 245KF. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-1866/2133, LPDDR3-1600/1866, DDR3L-1333/1600	DDR5
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 510	N/A
Max video memory	32 GB	no data
Quick Sync Video	+	-
Clear Video HD	+	no data
Graphics max frequency	900 MHz	no data

Graphics interfaces

Available interfaces and connections of Celeron 3955U and Core Ultra 5 245KF 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 3955U and Core Ultra 5 245KF 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
Max resolution over VGA	N/A	no data

Graphics API support

APIs supported by Celeron 3955U and Core Ultra 5 245KF 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 3955U and Core Ultra 5 245KF.

PCIe version	3.0	5.0
PCI Express lanes	12	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	0.93	27.55
Recency	15 August 2015	24 October 2024
Physical cores	2	14
Threads	2	14
Chip lithography	14 nm	3 nm
Power consumption (TDP)	15 Watt	125 Watt

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Should you still have questions on choice between Celeron 3955U and Core Ultra 5 245KF, ask them in Comments section, and we shall answer.

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