Xeon E3-1275L v3 vs D-1521

Primary details

Comparing Xeon D-1521 and Xeon E3-1275L v3 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1520	1440
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.60	no data
Market segment	Server	Server
Series	Intel Xeon D	no data
Power efficiency	7.53	8.33
Architecture codename	Broadwell (2015−2019)	no data
Release date	1 November 2015 (9 years ago)	1 April 2014 (10 years ago)
Launch price (MSRP)	$199	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon D-1521 and Xeon E3-1275L v3 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	4 (Quad-Core)	4 (Quad-Core)
Threads	8	8
Base clock speed	2.4 GHz	2.7 GHz
Boost clock speed	2.7 GHz	3.9 GHz
Bus type	DMI 2.0	no data
Bus rate	no data	5 GT/s
Multiplier	24	no data
L1 cache	64K (per core)	no data
L2 cache	256K (per core)	no data
L3 cache	1.5 MB (per core)	8 MB Intel® Smart Cache
Chip lithography	14 nm	22 nm
Die size	246.24 mm2	no data
Maximum case temperature (TCase)	80 °C	no data
Number of transistors	3,200 million	no data
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon D-1521 and Xeon E3-1275L v3 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	FCBGA1667	FCLGA1150
Power consumption (TDP)	45 Watt	45 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon D-1521 and Xeon E3-1275L v3. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	+	-
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
TSX	+	+
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	no data	+
SIPP	-	+
GPIO	+	no data
FDI	no data	+
Fast Memory Access	no data	+

Security technologies

Xeon D-1521 and Xeon E3-1275L v3 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon D-1521 and Xeon E3-1275L v3 are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon D-1521 and Xeon E3-1275L v3. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4, DDR3	DDR3-1333, DDR3-1600
Maximum memory size	128 GB	32 GB
Max memory channels	2	2
Maximum memory bandwidth	34.124 GB/s	25.6 GB/s
ECC memory support	+	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel HD Graphics for 4th Generation Intel Processors
Max video memory	no data	1.7 GB
Quick Sync Video	-	+
Clear Video HD	no data	+
Graphics max frequency	no data	1.2 GHz
Execution Units	no data	10
InTru 3D	no data	+

Graphics interfaces

Available interfaces and connections of Xeon D-1521 and Xeon E3-1275L v3 integrated GPUs.

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

Graphics image quality

Maximum display resolutions supported by Xeon D-1521 and Xeon E3-1275L v3 integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	no data	3840x2160@60Hz
Max resolution over DisplayPort	no data	3840x2160@60Hz
Max resolution over VGA	no data	2880x1800@60Hz

Graphics API support

APIs supported by Xeon D-1521 and Xeon E3-1275L v3 integrated GPUs, sometimes API versions are included.

DirectX	no data	11.2
OpenGL	no data	4.3

Peripherals

Specifications and connection of peripherals supported by Xeon D-1521 and Xeon E3-1275L v3.

PCIe version	2.0/3.0	3.0
PCI Express lanes	24	16
USB revision	2.0/3.0	no data
Total number of SATA ports	6	no data
Number of USB ports	8	no data
Integrated LAN	+	no data
UART	+	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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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	3.58	3.96
Recency	1 November 2015	1 April 2014
Chip lithography	14 nm	22 nm

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Should you still have questions on choice between Xeon D-1521 and Xeon E3-1275L v3, ask them in Comments section, and we shall answer.

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