Pentium D 840 vs Xeon Silver 4208

Primary details

Comparing Xeon Silver 4208 and Pentium D 840 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	991	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	18.58	no data
Market segment	Server	Desktop processor
Series	Intel Xeon Silver	no data
Power efficiency	7.88	no data
Architecture codename	Cascade Lake (2019−2020)	Smithfield (2005)
Release date	2 April 2019 (5 years ago)	May 2005 (19 years ago)
Launch price (MSRP)	$417	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon Silver 4208 and Pentium D 840 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	8 (Octa-Core)	2 (Dual-core)
Threads	16	2
Base clock speed	2.1 GHz	3.2 GHz
Boost clock speed	3.2 GHz	3.2 GHz
Multiplier	21	no data
L1 cache	512 KB	28 KB
L2 cache	8 MB	2 MB
L3 cache	11 MB	0 KB
Chip lithography	14 nm	90 nm
Die size	no data	206 mm2
Maximum core temperature	78 °C	70 °C
Number of transistors	no data	169 million
64 bit support	+	+
Windows 11 compatibility	+	-
VID voltage range	no data	1.2V-1.4V

Compatibility

Information on Xeon Silver 4208 and Pentium D 840 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 (Multiprocessor)	2
Socket	FCLGA3647	PLGA775
Power consumption (TDP)	85 Watt	130 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon Silver 4208 and Pentium D 840. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512	no data
AES-NI	+	-
AVX	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Speed Shift	+	no data
Turbo Boost Technology	2.0	-
Hyper-Threading Technology	+	-
TSX	+	-
Idle States	no data	+
Demand Based Switching	no data	-
PAE	no data	32 Bit
Turbo Boost Max 3.0	-	no data
FSB parity	no data	-
Deep Learning Boost	+	-

Security technologies

Xeon Silver 4208 and Pentium D 840 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon Silver 4208 and Pentium D 840 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon Silver 4208 and Pentium D 840. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2400	DDR1, DDR2, DDR3
Maximum memory size	1 TB	no data
Max memory channels	6	no data
Maximum memory bandwidth	115.212 GB/s	no data
ECC memory support	+	-

Peripherals

Specifications and connection of peripherals supported by Xeon Silver 4208 and Pentium D 840.

PCIe version	3.0	no data
PCI Express lanes	48	no data

Pros & cons summary

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Physical cores	8	2
Threads	16	2
Chip lithography	14 nm	90 nm
Power consumption (TDP)	85 Watt	130 Watt

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Should you still have questions on choice between Xeon Silver 4208 and Pentium D 840, ask them in Comments section, and we shall answer.

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