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.

 

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: 9778 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 9778 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 1603
  • 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 1603
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
1603
1717
PassMark - CPU mark
CPU 1
CPU 2
9778
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 1603 1717
PassMark - CPU mark 9778 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