Celeron B815 vs i5-5257U

Primary details

Comparing Core i5-5257U and Celeron B815 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2030	2939
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core i5	Intel Celeron
Power efficiency	5.98	1.24
Architecture codename	Broadwell-U (2015)	Sandy Bridge (2011−2013)
Release date	1 March 2015 (9 years ago)	1 January 2012 (12 years ago)
Launch price (MSRP)	$315	$86

Detailed specifications

Core i5-5257U and Celeron B815 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)	2 (Dual-core)
Threads	4	2
Base clock speed	2.7 GHz	1.6 GHz
Boost clock speed	3.1 GHz	1.6 GHz
Bus type	no data	DMI 2.0
Bus rate	5 GT/s	4 × 5 GT/s
Multiplier	no data	16
L1 cache	64K (per core)	64K (per core)
L2 cache	256K (per core)	256K (per core)
L3 cache	3 MB (shared)	2 MB (shared)
Chip lithography	14 nm	32 nm
Die size	133 mm2	131 mm2
Maximum core temperature	105 °C	100 °C
Maximum case temperature (TCase)	105 °C	no data
Number of transistors	1900 Million	504 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Core i5-5257U and Celeron B815 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	1 (Uniprocessor)
Socket	FCBGA1168	FCPGA988,PGA988
Power consumption (TDP)	28 Watt	35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-5257U and Celeron B815. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2
AES-NI	+	-
FMA	-	+
AVX	+	-
Enhanced SpeedStep (EIST)	+	+
My WiFi	no data	-
Turbo Boost Technology	2.0	-
Hyper-Threading Technology	+	-
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	+
Smart Response	+	no data
Demand Based Switching	no data	-
FDI	+	+
Fast Memory Access	+	+

Security technologies

Core i5-5257U and Celeron B815 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-5257U and Celeron B815 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-5257U and Celeron B815. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	16 GB	16 GB
Max memory channels	2	2
Maximum memory bandwidth	25.6 GB/s	21.335 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card Compare	Intel Iris Graphics 6100	Intel HD Graphics for 2nd Generation Intel Processors
Max video memory	16 GB	no data
Quick Sync Video	+	-
Clear Video	+	no data
Clear Video HD	+	-
Graphics max frequency	1.05 GHz	1.05 GHz
InTru 3D	+	-

Graphics interfaces

Available interfaces and connections of Core i5-5257U and Celeron B815 integrated GPUs.

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

Graphics image quality

Maximum display resolutions supported by Core i5-5257U and Celeron B815 integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	2560X1600@60Hz	no data
Max resolution over DisplayPort	3840x2160@60Hz	no data

Graphics API support

APIs supported by Core i5-5257U and Celeron B815 integrated GPUs, sometimes API versions are included.

DirectX	11.2/12	no data
OpenGL	4.3	no data

Peripherals

Specifications and connection of peripherals supported by Core i5-5257U and Celeron B815.

PCIe version	2.0	2.0
PCI Express lanes	12	16

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.

---

Pros & cons summary

---

Performance score	1.77	0.46
Integrated graphics card	2.33	0.77
Recency	1 March 2015	1 January 2012
Threads	4	2
Chip lithography	14 nm	32 nm
Power consumption (TDP)	28 Watt	35 Watt

---

Should you still have questions on choice between Core i5-5257U and Celeron B815, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.

---