Intel Xeon E5-2603 vs Intel Xeon X5647

Comparative analysis of Intel Xeon E5-2603 and Intel Xeon X5647 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Peripherals, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core.

Intel Xeon E5-2603

Intel Xeon X5647

Differences

Reasons to consider the Intel Xeon E5-2603

CPU is newer: launch date 1 year(s) 0 month(s) later
Around 33% higher maximum memory size: 384 GB vs 288 GB
Around 63% lower typical power consumption: 80 Watt vs 130 Watt

Launch date	March 2012 vs February 2011
Maximum memory size	384 GB vs 288 GB
Thermal Design Power (TDP)	80 Watt vs 130 Watt

Reasons to consider the Intel Xeon X5647

4 more threads: 8 vs 4
Around 78% higher clock speed: 3.20 GHz vs 1.8 GHz
Around 15% higher maximum core temperature: 80.4°C vs 70.0°C
Around 20% more L3 cache; more data can be stored in the L3 cache for quick access later
Around 63% better performance in PassMark - Single thread mark: 1418 vs 871
Around 94% better performance in PassMark - CPU mark: 8369 vs 4323

Specifications (specs)
Number of threads	8 vs 4
Maximum frequency	3.20 GHz vs 1.8 GHz
Maximum core temperature	80.4°C vs 70.0°C
L3 cache	12288 KB (shared) vs 10240 KB (shared)
Benchmarks
PassMark - Single thread mark	1418 vs 871
PassMark - CPU mark	8369 vs 4323

Compare benchmarks

CPU 1: Intel Xeon E5-2603
CPU 2: Intel Xeon X5647

PassMark - Single thread mark

CPU 1

CPU 2

871

1418

PassMark - CPU mark

CPU 1

CPU 2

4323

8369

Name	Intel Xeon E5-2603	Intel Xeon X5647
PassMark - Single thread mark	871	1418
PassMark - CPU mark	4323	8369
Geekbench 4 - Single Core	1771
Geekbench 4 - Multi-Core	5271

Compare specifications (specs)

	Intel Xeon E5-2603	Intel Xeon X5647
Essentials
Architecture codename	Sandy Bridge EP	Westmere EP
Launch date	March 2012	February 2011
Launch price (MSRP)	$207	$175
Place in performance rating	1632	1628
Price now	$27.84	$199.75
Processor Number	E5-2603	X5647
Series	Intel® Xeon® Processor E5 Family	Legacy Intel® Xeon® Processors
Status	Discontinued	Discontinued
Value for money (0-100)	37.88	8.82
Vertical segment	Server	Server
Performance
64 bit support
Base frequency	1.80 GHz	2.93 GHz
Bus Speed	6.4 GT/s QPI	5.86 GT/s QPI
Die size	294 mm	239 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)	12288 KB (shared)
Manufacturing process technology	32 nm	32 nm
Maximum core temperature	70.0°C	80.4°C
Maximum frequency	1.8 GHz	3.20 GHz
Number of cores	4	4
Number of QPI Links	2	2
Number of threads	4	8
Transistor count	1270 million	1170 million
VID voltage range	0.60V-1.35V	0.750V-1.350V
Memory
ECC memory support
Max memory channels	4	3
Maximum memory bandwidth	34.1 GB/s	25.6 GB/s
Maximum memory size	384 GB	288 GB
Supported memory types	DDR3 800/1066	DDR3 800/1066
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	2	2
Package Size	52.5mm x 45.0mm	42.5mm X 45mm
Sockets supported	FCLGA2011	FCLGA1366
Thermal Design Power (TDP)	80 Watt	130 Watt
Peripherals
Max number of PCIe lanes	40
PCI Express revision	3.0
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® SSE4.2
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
Physical Address Extensions (PAE)		40-bit
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)
Intel® VT-x with Extended Page Tables (EPT)