Pentium G840 vs Xeon E3-1281 v3

Primary details

Comparing Xeon E3-1281 v3 and Pentium G840 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1264	2609
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	4.61
Market segment	Server	Desktop processor
Power efficiency	5.43	1.15
Architecture codename	no data	Sandy Bridge (2011−2013)
Release date	1 April 2014 (10 years ago)	22 May 2011 (13 years ago)
Launch price (MSRP)	no data	$60

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E3-1281 v3 and Pentium G840 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	4 (Quad-Core)	2 (Dual-core)
Threads	8	2
Base clock speed	3.7 GHz	2.8 GHz
Boost clock speed	4.1 GHz	2.8 GHz
Bus rate	5 GT/s	no data
L1 cache	no data	64 KB (per core)
L2 cache	no data	256 KB (per core)
L3 cache	8 MB Intel® Smart Cache	3 MB (shared)
Chip lithography	22 nm	32 nm
Die size	no data	131 mm2
Maximum core temperature	no data	69 °C
Number of transistors	no data	504 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E3-1281 v3 and Pentium G840 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	1	1
Socket	FCLGA1150	FCLGA1155
Power consumption (TDP)	82 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1281 v3 and Pentium G840. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2
AES-NI	+	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	-
Hyper-Threading Technology	+	-
TSX	+	-
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	+
SIPP	+	-
FDI	no data	+
Fast Memory Access	+	+

Security technologies

Xeon E3-1281 v3 and Pentium G840 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+
Secure Key	+	no data
Identity Protection	+	-
OS Guard	+	no data
Anti-Theft	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1281 v3 and Pentium G840 are enumerated here.

VT-d	+	-
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E3-1281 v3 and Pentium G840. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3L-1333, DDR3L-1600	DDR3
Maximum memory size	32 GB	32 GB
Max memory channels	2	2
Maximum memory bandwidth	25.6 GB/s	21 GB/s
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel® HD Graphics for 2nd Generation Intel® Processors
Graphics max frequency	no data	1.1 GHz

Graphics interfaces

Available interfaces and connections of Xeon E3-1281 v3 and Pentium G840 integrated GPUs.

Number of displays supported

no data

2

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1281 v3 and Pentium G840.

PCIe version	3.0	2.0
PCI Express lanes	16	no data

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

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Pros & cons summary

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Performance score	4.88	0.82
Recency	1 April 2014	22 May 2011
Physical cores	4	2
Threads	8	2
Chip lithography	22 nm	32 nm
Power consumption (TDP)	82 Watt	65 Watt

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Should you still have questions on choice between Xeon E3-1281 v3 and Pentium G840, ask them in Comments section, and we shall answer.

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