Xeon D-1521 vs E3-1240 v5

General info

Comparing Xeon E3-1240 v5 and Xeon D-1521 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1075	1391
Place by popularity	not in top-100	not in top-100
Value for money	4.24	0.14
Market segment	Server	Server
Series	Intel Xeon E3	Intel Xeon D
Architecture codename	Skylake (2015−2016)	Broadwell (2015−2019)
Release date	19 October 2015 (8 years old)	1 November 2015 (8 years old)
Launch price (MSRP)	$282	$199
Current price	$168 (0.6x MSRP)	$2202 (11.1x MSRP)

Xeon E3-1240 v5 has 2929% better value for money than Xeon D-1521.

Technical specs

Xeon E3-1240 v5 and Xeon D-1521 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	3.5 GHz	2.4 GHz
Boost clock speed	3.9 GHz	2.7 GHz
Bus support	4 × 8 GT/s	no data
L1 cache	256 KB	64K (per core)
L2 cache	1 MB	256K (per core)
L3 cache	8 MB	1.5 MB (per core)
Chip lithography	14 nm	14 nm
Die size	122 mm2	246.24 mm2
Maximum case temperature (TCase)	no data	80 °C
Number of transistors	no data	3,200 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No

Compatibility

Information on Xeon E3-1240 v5 and Xeon D-1521 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
Socket	FCLGA1151,FCLGA2011	FCBGA1667
Power consumption (TDP)	80 Watt	45 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1240 v5 and Xeon D-1521. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® AVX2
AES-NI	+	+
AVX	+	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
TSX	+	+
Idle States	+	+
Thermal Monitoring	+	+
GPIO	no data	+
Status	Discontinued	Launched

Security technologies

Xeon E3-1240 v5 and Xeon D-1521 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1240 v5 and Xeon D-1521 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E3-1240 v5 and Xeon D-1521. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-1866, DDR4-2133, DDR3L-1333, DDR3L-1600	DDR4, DDR3
Maximum memory size	64 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	34.1 GB/s	34.124 GB/s
ECC memory support	+	+

Graphics image quality

Maximum display resolutions supported by Xeon E3-1240 v5 and Xeon D-1521 integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	N/A	no data
Max resolution over eDP	N/A	no data
Max resolution over DisplayPort	N/A	no data
Max resolution over VGA	N/A	no data

Graphics API support

APIs supported by Xeon E3-1240 v5 and Xeon D-1521 integrated GPUs, sometimes API versions are included.

DirectX	N/A	no data
OpenGL	N/A	no data

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1240 v5 and Xeon D-1521.

PCIe version	3.0	2.0/3.0
PCI Express lanes	16	32
USB revision	no data	2.0/3.0
Total number of SATA ports	no data	6
Number of USB ports	no data	8
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.

E3-1240 v5 outperforms D-1521 by 46% based on our aggregated benchmark results.

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Advantages and disadvantages

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Performance score	5.39	3.69
Cost	$282	$199
Power consumption (TDP)	80 Watt	45 Watt

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Should you still have questions on choice between Xeon E3-1240 v5 and Xeon D-1521, ask them in Comments section, and we shall answer.

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