Processor N100 vs Xeon E5645

Primary details

Comparing Xeon E5645 and Processor N100 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1605	1788
Place by popularity	not in top-100	65
Cost-effectiveness evaluation	1.38	no data
Market segment	Server	Laptop
Series	no data	Intel Alder Lake-N
Power efficiency	3.76	37.07
Architecture codename	Westmere-EP (2010−2011)	Alder Lake-N (2023)
Release date	16 March 2010 (14 years ago)	3 January 2023 (1 year ago)
Launch price (MSRP)	$294	$128

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5645 and Processor N100 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	6 (Hexa-Core)	4 (Quad-Core)
Threads	12	4
Base clock speed	2.4 GHz	0.1 GHz
Boost clock speed	2.67 GHz	3.4 GHz
L1 cache	64 KB (per core)	96 KB (per core)
L2 cache	256 KB (per core)	2 MB (shared)
L3 cache	12 MB (shared)	6 MB (shared)
Chip lithography	32 nm	10 nm
Die size	239 mm2	no data
Maximum core temperature	76 °C	105 °C
Number of transistors	1,170 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+

Compatibility

Information on Xeon E5645 and Processor N100 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	2	1
Socket	FCLGA1366,LGA1366	Intel BGA 1264
Power consumption (TDP)	80 Watt	6 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5645 and Processor N100. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	no data
AES-NI	+	+
FMA	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	1.0	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Demand Based Switching	+	no data
PAE	40 Bit	no data

Security technologies

Xeon E5645 and Processor N100 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5645 and Processor N100 are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5645 and Processor N100. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4, DDR5
Maximum memory size	288 GB	no data
Max memory channels	3	no data
Maximum memory bandwidth	32 GB/s	no data
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

Intel UHD Graphics 24EUs (Alder Lake-N)

Peripherals

Specifications and connection of peripherals supported by Xeon E5645 and Processor N100.

PCIe version	2.0	3.0
PCI Express lanes	no data	9

Pros & cons summary

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Performance score	3.18	2.35
Recency	16 March 2010	3 January 2023
Physical cores	6	4
Threads	12	4
Chip lithography	32 nm	10 nm
Power consumption (TDP)	80 Watt	6 Watt

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