Intel Xeon E5-1660 vs Intel Xeon X5647

Comparative analysis of Intel Xeon E5-1660 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 E5-1660

Intel Xeon X5647

Differences

Reasons to consider the Intel Xeon E5-1660

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 22% higher clock speed: 3.90 GHz vs 3.20 GHz
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 25% more L3 cache; more data can be stored in the L3 cache for quick access later
Around 27% better performance in PassMark - Single thread mark: 1801 vs 1418

Specifications (specs)
Launch date	March 2012 vs February 2011
Number of cores	6 vs 4
Number of threads	12 vs 8
Maximum frequency	3.90 GHz vs 3.20 GHz
L1 cache	64 KB (per core) vs 64 KB (per core)
L2 cache	256 KB (per core) vs 256 KB (per core)
L3 cache	15360 KB (shared) vs 12288 KB (shared)
Benchmarks
PassMark - Single thread mark	1801 vs 1418
PassMark - CPU mark	8397 vs 8369

Reasons to consider the Intel Xeon X5647

Around 26% higher maximum core temperature: 80.4°C vs 64°C
Around 13% higher maximum memory size: 288 GB vs 256 GB

Maximum core temperature	80.4°C vs 64°C
Maximum memory size	288 GB vs 256 GB
Max number of CPUs in a configuration	2 vs 1

Compare benchmarks

CPU 1: Intel Xeon E5-1660
CPU 2: Intel Xeon X5647

PassMark - Single thread mark

CPU 1

CPU 2

1801

1418

PassMark - CPU mark

CPU 1

CPU 2

8397

8369

Name	Intel Xeon E5-1660	Intel Xeon X5647
PassMark - Single thread mark	1801	1418
PassMark - CPU mark	8397	8369
Geekbench 4 - Single Core	777
Geekbench 4 - Multi-Core	4774

Compare specifications (specs)

	Intel Xeon E5-1660	Intel Xeon X5647
Essentials
Architecture codename	Sandy Bridge EP	Westmere EP
Launch date	March 2012	February 2011
Launch price (MSRP)	$290	$175
Place in performance rating	1602	1622
Price now	$1,226.66	$199.75
Processor Number	E5-1660	X5647
Series	Intel® Xeon® Processor E5 Family	Legacy Intel® Xeon® Processors
Status	Discontinued	Discontinued
Value for money (0-100)	2.97	8.82
Vertical segment	Server	Server
Performance
64 bit support
Base frequency	3.30 GHz	2.93 GHz
Bus Speed	0 QPI	5.86 GT/s QPI
Die size	435 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	15360 KB (shared)	12288 KB (shared)
Manufacturing process technology	32 nm	32 nm
Maximum core temperature	64°C	80.4°C
Maximum frequency	3.90 GHz	3.20 GHz
Number of cores	6	4
Number of QPI Links	0	2
Number of threads	12	8
Transistor count	2270 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	51.2 GB/s	25.6 GB/s
Maximum memory size	256 GB	288 GB
Supported memory types	DDR3 800/1066/1333/1600	DDR3 800/1066
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	1	2
Package Size	52.5mm x 45.0 mm	42.5mm X 45mm
Sockets supported	FCLGA2011	FCLGA1366
Thermal Design Power (TDP)	130 Watt	130 Watt
Peripherals
Max number of PCIe lanes	40
PCI Express revision	3.0
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)