Intel Atom C3958 vs Intel Xeon E5645

Comparative analysis of Intel Atom C3958 and Intel Xeon E5645 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, 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 Atom C3958

Intel Xeon E5645

Differences

Reasons to consider the Intel Atom C3958

10 more cores, run more applications at once: 16 vs 6
4 more threads: 16 vs 12
Around 31% higher maximum core temperature: 100°C vs 76.2°C
A newer manufacturing process allows for a more powerful, yet cooler running processor: 14 nm vs 32 nm
2.6x lower typical power consumption: 31 Watt vs 80 Watt

Number of cores	16 vs 6
Number of threads	16 vs 12
Maximum core temperature	100°C vs 76.2°C
Manufacturing process technology	14 nm vs 32 nm
Thermal Design Power (TDP)	31 Watt vs 80 Watt

Reasons to consider the Intel Xeon E5645

Around 34% higher clock speed: 2.67 GHz vs 2.00 GHz
Around 13% higher maximum memory size: 288 GB vs 256 GB
Around 59% better performance in PassMark - Single thread mark: 1175 vs 737
2.3x better performance in PassMark - CPU mark: 9143 vs 3929

Specifications (specs)
Maximum frequency	2.67 GHz vs 2.00 GHz
Maximum memory size	288 GB vs 256 GB
Max number of CPUs in a configuration	2 vs 1
Benchmarks
PassMark - Single thread mark	1175 vs 737
PassMark - CPU mark	9143 vs 3929

Compare benchmarks

CPU 1: Intel Atom C3958
CPU 2: Intel Xeon E5645

PassMark - Single thread mark

CPU 1

CPU 2

737

1175

PassMark - CPU mark

CPU 1

CPU 2

3929

9143

Name	Intel Atom C3958	Intel Xeon E5645
PassMark - Single thread mark	737	1175
PassMark - CPU mark	3929	9143
Geekbench 4 - Single Core		442
Geekbench 4 - Multi-Core		2731
CompuBench 1.5 Desktop - Face Detection (mPixels/s)		2.308
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)		49.224
CompuBench 1.5 Desktop - T-Rex (Frames/s)		0.623
CompuBench 1.5 Desktop - Video Composition (Frames/s)		3.664
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)		11.094

Compare specifications (specs)

	Intel Atom C3958	Intel Xeon E5645
Essentials
Architecture codename	Denverton	Westmere EP
Launch date	Q3'17	March 2010
Place in performance rating	2509	2488
Processor Number	C3958	E5645
Series	Intel® Atom™ Processor C Series	Legacy Intel® Xeon® Processors
Status	Launched	Launched
Vertical segment	Server	Server
Launch price (MSRP)		$294
Price now		$239.95
Value for money (0-100)		7.96
Performance
64 bit support
Base frequency	2.00 GHz	2.40 GHz
Manufacturing process technology	14 nm	32 nm
Maximum core temperature	100°C	76.2°C
Maximum frequency	2.00 GHz	2.67 GHz
Number of cores	16	6
Number of QPI Links	0	2
Number of threads	16	12
Number of Ultra Path Interconnect (UPI) Links	0
Bus Speed		5.86 GT/s QPI
Die size		239 mm
L1 cache		64 KB (per core)
L2 cache		256 KB (per core)
L3 cache		12288 KB (shared)
Transistor count		1170 million
VID voltage range		0.750V-1.350V
Memory
Max memory channels	2	3
Maximum memory size	256 GB	288 GB
Supported memory types	DDR4: 2400	DDR3 800/1066/1333
ECC memory support
Maximum memory bandwidth		32 GB/s
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	1	2
Package Size	34 mm x 28 mm	42.5mm X 45mm
Sockets supported	FCBGA1310	FCLGA1366
Thermal Design Power (TDP)	31 Watt	80 Watt
Peripherals
Integrated LAN
Max number of PCIe lanes	16
Max number of SATA 6 Gb/s Ports	16
Number of USB ports	8
PCI Express revision	3
PCIe configurations	x2,x4,x8
Total number of SATA ports	16
USB revision	3
Security & Reliability
Execute Disable Bit (EDB)
Intel® OS Guard
Intel® Secure Key technology
Intel® Software Guard Extensions (Intel® SGX)
Secure Boot
Intel® Trusted Execution technology (TXT)
Advanced Technologies
Integrated Intel® QuickAssist Technology
Intel® AES New Instructions
Intel® Hyper-Threading technology
Intel® Turbo Boost technology
Enhanced Intel SpeedStep® technology
Idle States
Instruction set extensions		Intel® SSE4.2
Intel 64
Intel® Demand Based Switching
Physical Address Extensions (PAE)		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)