Intel Xeon D-1521 vs Intel Xeon E5-2637

Comparative analysis of Intel Xeon D-1521 and Intel Xeon E5-2637 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Peripherals, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark.

Intel Xeon D-1521

Intel Xeon E5-2637

Differences

Reasons to consider the Intel Xeon D-1521

2 more cores, run more applications at once: 4 vs 2
4 more threads: 8 vs 4
A newer manufacturing process allows for a more powerful, yet cooler running processor: 14 nm vs 32 nm
Around 78% lower typical power consumption: 45 Watt vs 80 Watt

Specifications (specs)
Number of cores	4 vs 2
Number of threads	8 vs 4
Manufacturing process technology	14 nm vs 32 nm
Thermal Design Power (TDP)	45 Watt vs 80 Watt
Benchmarks
PassMark - Single thread mark	1655 vs 1654

Reasons to consider the Intel Xeon E5-2637

Around 30% higher clock speed: 3.50 GHz vs 2.70 GHz
3x more maximum memory size: 384 GB vs 128 GB
Around 1% better performance in PassMark - CPU mark: 5775 vs 5699

Specifications (specs)
Maximum frequency	3.50 GHz vs 2.70 GHz
Maximum memory size	384 GB vs 128 GB
Max number of CPUs in a configuration	2 vs 1
Benchmarks
PassMark - CPU mark	5775 vs 5699

Compare benchmarks

CPU 1: Intel Xeon D-1521
CPU 2: Intel Xeon E5-2637

PassMark - Single thread mark

CPU 1

CPU 2

1655

1654

PassMark - CPU mark

CPU 1

CPU 2

5699

5775

Name	Intel Xeon D-1521	Intel Xeon E5-2637
PassMark - Single thread mark	1655	1654
PassMark - CPU mark	5699	5775

Compare specifications (specs)

	Intel Xeon D-1521	Intel Xeon E5-2637
Essentials
Architecture codename	Broadwell	Sandy Bridge EP
Launch date	Q4'15	March 2012
Place in performance rating	1510	1515
Processor Number	D-1521	E5-2637
Series	Intel® Xeon® D Processor	Intel® Xeon® Processor E5 Family
Status	Launched	Discontinued
Vertical segment	Server	Server
Performance
64 bit support
Base frequency	2.40 GHz	3.00 GHz
Manufacturing process technology	14 nm	32 nm
Maximum frequency	2.70 GHz	3.50 GHz
Number of cores	4	2
Number of threads	8	4
Bus Speed		8 GT/s QPI
Die size		294 mm
L1 cache		64 KB (per core)
L2 cache		256 KB (per core)
L3 cache		5120 KB (shared)
Maximum core temperature		70.0°C
Number of QPI Links		2
Transistor count		1270 million
VID voltage range		0.6V - 1.35V
Memory
Max memory channels	2	4
Maximum memory size	128 GB	384 GB
Supported memory frequency	2133 MHz
Supported memory types	DDR4, DDR3	DDR3 800/1066/1333/1600
ECC memory support
Maximum memory bandwidth		51.2 GB/s
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	1	2
Package Size	37.5mm x 37.5mm	52.5mm x 45.0mm
Sockets supported	FCBGA1667	FCLGA2011
Thermal Design Power (TDP)	45 Watt	80 Watt
Peripherals
Integrated LAN
Max number of PCIe lanes	32	40
Number of USB ports	8
PCI Express revision	2.0/3.0	3.0
PCIe configurations	x4 x8 x16
Scalability	1S Only	2S Only
Total number of SATA ports	6
UART
USB revision	2.0/3.0
Security & Reliability
Execute Disable Bit (EDB)
Intel® OS Guard
Intel® Secure Key technology
Intel® Trusted Execution technology (TXT)
Intel® Identity Protection technology
Advanced Technologies
Enhanced Intel SpeedStep® technology
General-Purpose Input/Output (GPIO)
Idle States
Instruction set extensions	Intel® AVX2	Intel® AVX
Intel 64
Intel® AES New Instructions
Intel® Hyper-Threading technology
Intel® TSX-NI
Intel® Turbo Boost technology
Thermal Monitoring
Intel® Advanced Vector Extensions (AVX)
Intel® Demand Based Switching
Intel® Flex Memory Access
Intel® vPro™ Platform Eligibility
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)
Intel® VT-x with Extended Page Tables (EPT)