Intel Xeon E5645 vs Intel Xeon X5550

Comparative analysis of Intel Xeon E5645 and Intel Xeon X5550 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).

Intel Xeon E5645

Intel Xeon X5550

Differences

Reasons to consider the Intel Xeon E5645

CPU is newer: launch date 1 year(s) 0 month(s) later
2 more cores, run more applications at once: 6 vs 4
4 more threads: 12 vs 8
Around 2% higher maximum core temperature: 76.2°C vs 75°C
A newer manufacturing process allows for a more powerful, yet cooler running processor: 32 nm vs 45 nm
Around 50% more L1 cache; more data can be stored in the L1 cache for quick access later
Around 50% more L2 cache; more data can be stored in the L2 cache for quick access later
Around 50% more L3 cache; more data can be stored in the L3 cache for quick access later
2x more maximum memory size: 288 GB vs 144 GB
Around 19% lower typical power consumption: 80 Watt vs 95 Watt
Around 63% better performance in PassMark - CPU mark: 9206 vs 5637
Around 22% better performance in Geekbench 4 - Multi-Core: 2731 vs 2241
Around 30% better performance in CompuBench 1.5 Desktop - Face Detection (mPixels/s): 2.308 vs 1.775
Around 17% better performance in CompuBench 1.5 Desktop - T-Rex (Frames/s): 0.623 vs 0.531
Around 28% better performance in CompuBench 1.5 Desktop - Video Composition (Frames/s): 3.664 vs 2.861
Around 30% better performance in CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s): 11.094 vs 8.548

Specifications (specs)
Launch date	March 2010 vs March 2009
Number of cores	6 vs 4
Number of threads	12 vs 8
Maximum core temperature	76.2°C vs 75°C
Manufacturing process technology	32 nm vs 45 nm
L1 cache	64 KB (per core) vs 64 KB (per core)
L2 cache	256 KB (per core) vs 256 KB (per core)
L3 cache	12288 KB (shared) vs 8192 KB (shared)
Maximum memory size	288 GB vs 144 GB
Thermal Design Power (TDP)	80 Watt vs 95 Watt
Benchmarks
PassMark - CPU mark	9206 vs 5637
Geekbench 4 - Multi-Core	2731 vs 2241
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	2.308 vs 1.775
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.623 vs 0.531
CompuBench 1.5 Desktop - Video Composition (Frames/s)	3.664 vs 2.861
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	11.094 vs 8.548

Reasons to consider the Intel Xeon X5550

Around 15% higher clock speed: 3.06 GHz vs 2.67 GHz
Around 12% better performance in PassMark - Single thread mark: 1313 vs 1175
Around 11% better performance in Geekbench 4 - Single Core: 491 vs 442
Around 46% better performance in CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s): 71.663 vs 49.224

Specifications (specs)
Maximum frequency	3.06 GHz vs 2.67 GHz
Benchmarks
PassMark - Single thread mark	1313 vs 1175
Geekbench 4 - Single Core	491 vs 442
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	71.663 vs 49.224

Compare benchmarks

CPU 1: Intel Xeon E5645
CPU 2: Intel Xeon X5550

PassMark - Single thread mark

CPU 1

CPU 2

1175

1313

PassMark - CPU mark

CPU 1

CPU 2

9206

5637

Geekbench 4 - Single Core

CPU 1

CPU 2

442

491

Geekbench 4 - Multi-Core

CPU 1

CPU 2

2731

2241

CompuBench 1.5 Desktop - Face Detection (mPixels/s)

CPU 1

CPU 2

2.308

1.775

CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)

CPU 1

CPU 2

49.224

71.663

CompuBench 1.5 Desktop - T-Rex (Frames/s)

CPU 1

CPU 2

0.623

0.531

CompuBench 1.5 Desktop - Video Composition (Frames/s)

CPU 1

CPU 2

3.664

2.861

CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)

CPU 1

CPU 2

11.094

8.548

Name	Intel Xeon E5645	Intel Xeon X5550
PassMark - Single thread mark	1175	1313
PassMark - CPU mark	9206	5637
Geekbench 4 - Single Core	442	491
Geekbench 4 - Multi-Core	2731	2241
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	2.308	1.775
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	49.224	71.663
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.623	0.531
CompuBench 1.5 Desktop - Video Composition (Frames/s)	3.664	2.861
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	11.094	8.548

Compare specifications (specs)

	Intel Xeon E5645	Intel Xeon X5550
Essentials
Architecture codename	Westmere EP	Nehalem EP
Launch date	March 2010	March 2009
Launch price (MSRP)	$294	$62
Place in performance rating	2512	2549
Price now	$239.95	$17.27
Processor Number	E5645	X5550
Series	Legacy Intel® Xeon® Processors	Legacy Intel® Xeon® Processors
Status	Launched	Launched
Value for money (0-100)	7.96	92.15
Vertical segment	Server	Server
Performance
64 bit support
Base frequency	2.40 GHz	2.66 GHz
Bus Speed	5.86 GT/s QPI	6.4 GT/s QPI
Die size	239 mm	263 mm2
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	12288 KB (shared)	8192 KB (shared)
Manufacturing process technology	32 nm	45 nm
Maximum core temperature	76.2°C	75°C
Maximum frequency	2.67 GHz	3.06 GHz
Number of cores	6	4
Number of QPI Links	2	2
Number of threads	12	8
Transistor count	1170 million	731 million
VID voltage range	0.750V-1.350V	0.75V -1.35V
Memory
ECC memory support
Max memory channels	3	3
Maximum memory bandwidth	32 GB/s	32 GB/s
Maximum memory size	288 GB	144 GB
Supported memory types	DDR3 800/1066/1333	DDR3 800/1066/1333
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	2	2
Package Size	42.5mm X 45mm	42.5mm x 45mm
Sockets supported	FCLGA1366	FCLGA1366
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
Instruction set extensions	Intel® SSE4.2
Intel 64
Intel® AES New Instructions
Intel® Demand Based Switching
Intel® Hyper-Threading technology
Intel® Turbo Boost technology
Physical Address Extensions (PAE)	40-bit	40-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)