Intel Xeon E5-2643 vs Intel Xeon E3-1245

Comparative analysis of Intel Xeon E5-2643 and Intel Xeon E3-1245 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Peripherals, Security & Reliability, Advanced Technologies, Virtualization, Graphics, Graphics interfaces. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core.

Intel Xeon E5-2643

Intel Xeon E3-1245

Differences

Reasons to consider the Intel Xeon E5-2643

CPU is newer: launch date 10 month(s) later
Around 1% higher maximum core temperature: 73°C vs 72.6°C
Around 25% more L3 cache; more data can be stored in the L3 cache for quick access later
12x more maximum memory size: 384 GB vs 32 GB
Around 83% better performance in PassMark - CPU mark: 9774 vs 5334
Around 3% better performance in Geekbench 4 - Multi-Core: 2761 vs 2683

Specifications (specs)
Launch date	March 2012 vs April 2011
Maximum core temperature	73°C vs 72.6°C
L3 cache	10240 KB (shared) vs 8192 KB (shared)
Maximum memory size	384 GB vs 32 GB
Max number of CPUs in a configuration	2 vs 1
Benchmarks
PassMark - CPU mark	9774 vs 5334
Geekbench 4 - Multi-Core	2761 vs 2683

Reasons to consider the Intel Xeon E3-1245

Around 6% higher clock speed: 3.70 GHz vs 3.50 GHz
Around 37% lower typical power consumption: 95 Watt vs 130 Watt
Around 7% better performance in PassMark - Single thread mark: 1717 vs 1600
Around 12% better performance in Geekbench 4 - Single Core: 713 vs 638

Specifications (specs)
Maximum frequency	3.70 GHz vs 3.50 GHz
Thermal Design Power (TDP)	95 Watt vs 130 Watt
Benchmarks
PassMark - Single thread mark	1717 vs 1600
Geekbench 4 - Single Core	713 vs 638

Compare benchmarks

CPU 1: Intel Xeon E5-2643
CPU 2: Intel Xeon E3-1245

PassMark - Single thread mark

CPU 1

CPU 2

1600

1717

PassMark - CPU mark

CPU 1

CPU 2

9774

5334

Geekbench 4 - Single Core

CPU 1

CPU 2

638

713

Geekbench 4 - Multi-Core

CPU 1

CPU 2

2761

2683

Name	Intel Xeon E5-2643	Intel Xeon E3-1245
PassMark - Single thread mark	1600	1717
PassMark - CPU mark	9774	5334
Geekbench 4 - Single Core	638	713
Geekbench 4 - Multi-Core	2761	2683

Compare specifications (specs)

	Intel Xeon E5-2643	Intel Xeon E3-1245
Essentials
Architecture codename	Sandy Bridge EP	Sandy Bridge
Launch date	March 2012	April 2011
Launch price (MSRP)	$218	$350
Place in performance rating	1859	1851
Price now	$2,664	$260
Processor Number	E5-2643	E3-1245
Series	Intel® Xeon® Processor E5 Family	Intel® Xeon® Processor E3 Family
Status	Discontinued	Discontinued
Value for money (0-100)	0.93	9.09
Vertical segment	Server	Server
Performance
64 bit support
Base frequency	3.30 GHz	3.30 GHz
Bus Speed	8 GT/s QPI	5 GT/s DMI
Die size	294 mm	216 mm
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	10240 KB (shared)	8192 KB (shared)
Manufacturing process technology	32 nm	32 nm
Maximum core temperature	73°C	72.6°C
Maximum frequency	3.50 GHz	3.70 GHz
Number of cores	4	4
Number of QPI Links	2
Number of threads	8	8
Transistor count	1270 million	1160 million
VID voltage range	0.60V-1.35V
Memory
ECC memory support
Max memory channels	4	2
Maximum memory bandwidth	51.2 GB/s	21 GB/s
Maximum memory size	384 GB	32 GB
Supported memory types	DDR3 800/1066/1333/1600	DDR3 1066/1333
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	2	1
Package Size	52.5mm x 45.0mm	37.5mm x 37.5mm
Sockets supported	FCLGA2011	LGA1155
Thermal Design Power (TDP)	130 Watt	95 Watt
Peripherals
Max number of PCIe lanes	40	20
PCI Express revision	3.0	2.0
Scalability	2S Only
Security & Reliability
Execute Disable Bit (EDB)
Intel® Identity Protection technology
Intel® Trusted Execution technology (TXT)
Advanced Technologies
Enhanced Intel SpeedStep® technology
Idle States
Instruction set extensions	Intel® AVX	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX
Intel 64
Intel® Advanced Vector Extensions (AVX)
Intel® AES New Instructions
Intel® Demand Based Switching
Intel® Flex Memory Access
Intel® Hyper-Threading technology
Intel® Turbo Boost technology
Intel® vPro™ Platform Eligibility
Thermal Monitoring
Flexible Display interface (FDI)
Intel® Fast Memory Access
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)
Intel® VT-x with Extended Page Tables (EPT)
Graphics
Graphics base frequency		850 MHz
Graphics max dynamic frequency		1.35 GHz
Graphics max frequency		1.35 GHz
Intel® Clear Video HD technology
Intel® Flexible Display Interface (Intel® FDI)
Intel® InTru™ 3D technology
Intel® Quick Sync Video
Processor graphics		Intel HD Graphics P3000
Graphics interfaces
Number of displays supported		2
Wireless Display (WiDi) support