Intel Xeon E5520 vs Intel Pentium D 820

Comparative analysis of Intel Xeon E5520 and Intel Pentium D 820 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core, CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s).

 

Differences

Reasons to consider the Intel Xeon E5520

  • CPU is newer: launch date 3 year(s) 9 month(s) later
  • 2 more cores, run more applications at once: 4 vs 2
  • 6 more threads: 8 vs 2
  • Around 12% higher maximum core temperature: 72°C vs 64.1°C
  • A newer manufacturing process allows for a more powerful, yet cooler running processor: 45 nm vs 90 nm
  • 9.1x more L1 cache, more data can be stored in the L1 cache for quick access later
  • Around 19% lower typical power consumption: 80 Watt vs 95 Watt
  • 2.2x better performance in Geekbench 4 - Single Core: 397 vs 179
  • 6.4x better performance in Geekbench 4 - Multi-Core: 1969 vs 307
Specifications (specs)
Launch date March 2009 vs May 2005
Number of cores 4 vs 2
Number of threads 8 vs 2
Maximum core temperature 72°C vs 64.1°C
Manufacturing process technology 45 nm vs 90 nm
L1 cache 64 KB (per core) vs 28 KB
Thermal Design Power (TDP) 80 Watt vs 95 Watt
Benchmarks
Geekbench 4 - Single Core 397 vs 179
Geekbench 4 - Multi-Core 1969 vs 307

Reasons to consider the Intel Pentium D 820

  • Around 11% higher clock speed: 2.8 GHz vs 2.53 GHz
  • 2x more L2 cache, more data can be stored in the L2 cache for quick access later
Maximum frequency 2.8 GHz vs 2.53 GHz
L2 cache 2048 KB vs 256 KB (per core)

Compare benchmarks

CPU 1: Intel Xeon E5520
CPU 2: Intel Pentium D 820

Geekbench 4 - Single Core
CPU 1
CPU 2
397
179
Geekbench 4 - Multi-Core
CPU 1
CPU 2
1969
307
Name Intel Xeon E5520 Intel Pentium D 820
PassMark - Single thread mark 1104
PassMark - CPU mark 4642
Geekbench 4 - Single Core 397 179
Geekbench 4 - Multi-Core 1969 307
CompuBench 1.5 Desktop - Face Detection (mPixels/s) 1.453
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s) 62.27
CompuBench 1.5 Desktop - T-Rex (Frames/s) 0.429
CompuBench 1.5 Desktop - Video Composition (Frames/s) 2.436
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s) 6.95

Compare specifications (specs)

Intel Xeon E5520 Intel Pentium D 820

Essentials

Architecture codename Nehalem EP Smithfield
Launch date March 2009 May 2005
Launch price (MSRP) $19
Place in performance rating 2725 3302
Price now $42.39
Processor Number E5520 820
Series Legacy Intel® Xeon® Processors Legacy Intel® Pentium® Processor
Status Launched Discontinued
Value for money (0-100) 30.90
Vertical segment Server Desktop

Performance

64 bit support
Base frequency 2.26 GHz 2.80 GHz
Bus Speed 5.86 GT/s QPI 800 MHz FSB
Die size 263 mm2 206 mm2
L1 cache 64 KB (per core) 28 KB
L2 cache 256 KB (per core) 2048 KB
L3 cache 8192 KB (shared)
Manufacturing process technology 45 nm 90 nm
Maximum core temperature 72°C 64.1°C
Maximum frequency 2.53 GHz 2.8 GHz
Number of cores 4 2
Number of QPI Links 2
Number of threads 8 2
Transistor count 731 million 230 million
VID voltage range 0.75V -1.35V 1.200V-1.400V
Front-side bus (FSB) 800 MHz

Memory

ECC memory support
Max memory channels 3
Maximum memory bandwidth 25.6 GB/s
Maximum memory size 144 GB
Supported memory types DDR3 800/1066 DDR1, DDR2, DDR3

Compatibility

Low Halogen Options Available
Max number of CPUs in a configuration 2 2
Package Size 42.5mm x 45mm 37.5mm x 37.5mm
Sockets supported FCLGA1366 PLGA775
Thermal Design Power (TDP) 80 Watt 95 Watt

Security & Reliability

Execute Disable Bit (EDB)
Intel® Trusted Execution technology (TXT)

Advanced Technologies

Enhanced Intel SpeedStep® technology
Idle States
Intel 64
Intel® Demand Based Switching
Intel® Hyper-Threading technology
Intel® Turbo Boost technology
Physical Address Extensions (PAE) 40-bit 32-bit
FSB parity
Intel® AES New Instructions
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)