Intel Xeon E5-2651 v2 vs Intel Xeon E5-2643 v2

Comparative analysis of Intel Xeon E5-2651 v2 and Intel Xeon E5-2643 v2 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Peripherals, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: Geekbench 4 - Single Core, Geekbench 4 - Multi-Core, PassMark - Single thread mark, PassMark - CPU mark.

Intel Xeon E5-2651 v2

Intel Xeon E5-2643 v2

Differences

Reasons to consider the Intel Xeon E5-2651 v2

CPU is newer: launch date 2 month(s) later
6 more cores, run more applications at once: 12 vs 6
12 more threads: 24 vs 12
2x more L1 cache, more data can be stored in the L1 cache for quick access later
2x more L2 cache, more data can be stored in the L2 cache for quick access later
2x more L3 cache, more data can be stored in the L3 cache for quick access later

Launch date	November 2013 vs September 2013
Number of cores	12 vs 6
Number of threads	24 vs 12
L1 cache	768 KB vs 64 KB (per core)
L2 cache	3 MB vs 256 KB (per core)
L3 cache	30 MB vs 15360 KB (shared)

Reasons to consider the Intel Xeon E5-2643 v2

1024x more maximum memory size: 768 GB vs 768 GB (per socket)
Around 79% better performance in Geekbench 4 - Single Core: 3641 vs 2030
Around 3% better performance in Geekbench 4 - Multi-Core: 18673 vs 18071

Specifications (specs)
Maximum memory size	768 GB vs 768 GB (per socket)
Benchmarks
Geekbench 4 - Single Core	3641 vs 2030
Geekbench 4 - Multi-Core	18673 vs 18071

Compare benchmarks

CPU 1: Intel Xeon E5-2651 v2
CPU 2: Intel Xeon E5-2643 v2

Geekbench 4 - Single Core

CPU 1

CPU 2

2030

3641

Geekbench 4 - Multi-Core

CPU 1

CPU 2

18071

18673

Name	Intel Xeon E5-2651 v2	Intel Xeon E5-2643 v2
Geekbench 4 - Single Core	2030	3641
Geekbench 4 - Multi-Core	18071	18673
PassMark - Single thread mark		1976
PassMark - CPU mark		17142

Compare specifications (specs)

	Intel Xeon E5-2651 v2	Intel Xeon E5-2643 v2
Essentials
Architecture codename	Ivy Bridge-EP	Ivy Bridge EP
Family	Intel Xeon E5-2600 v2
Launch date	November 2013	September 2013
Place in performance rating	287	300
Processor Number	E5-2651 v2	E5-2643V2
Vertical segment	Server	Server
Launch price (MSRP)		$2,200
Price now		$2,641.75
Series		Intel® Xeon® Processor E5 v2 Family
Status		Launched
Value for money (0-100)		1.43
Performance
64 bit support
Base frequency	1800 MHz	3.50 GHz
Bus Speed	5 GT/s DMI	8 GT/s QPI
L1 cache	768 KB	64 KB (per core)
L2 cache	3 MB	256 KB (per core)
L3 cache	30 MB	15360 KB (shared)
Manufacturing process technology	22 nm	22 nm
Number of cores	12	6
Number of threads	24	12
Die size		160 mm
Maximum core temperature		74°C
Maximum frequency		3.80 GHz
Number of QPI Links		2
Transistor count		1400 million
VID voltage range		0.65–1.30V
Memory
ECC memory support
Max memory channels	4	4
Maximum memory size	768 GB (per socket)	768 GB
Supported memory types	DDR3	DDR3 800/1066/1333/1600/1866
Maximum memory bandwidth		59.7 GB/s
Compatibility
Max number of CPUs in a configuration	2	2
Sockets supported	LGA2011	FCLGA2011
Low Halogen Options Available
Package Size		52.5mm x 45mm
Thermal Design Power (TDP)		130 Watt
Peripherals
PCI Express revision	3.0	3.0
Max number of PCIe lanes		40
PCIe configurations		x4, x8, x16
Scalability		2S Only
Security & Reliability
Execute Disable Bit (EDB)
Intel® Trusted Execution technology (TXT)
Intel® Identity Protection technology
Intel® OS Guard
Intel® Secure Key technology
Advanced Technologies
Enhanced Intel SpeedStep® technology
Intel® Advanced Vector Extensions (AVX)
Intel® AES New Instructions
Intel® Hyper-Threading technology
Intel® Turbo Boost technology
Idle States
Instruction set extensions		Intel® AVX
Intel 64
Intel® Demand Based Switching
Intel® Flex Memory Access
Intel® TSX-NI
Intel® vPro™ Platform Eligibility
Physical Address Extensions (PAE)		46-bit
Thermal Monitoring
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)
Intel® VT-x with Extended Page Tables (EPT)