i7-940 vs Xeon X5687

Primary details

Comparing Xeon X5687 and Core i7-940 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1561	1978
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.48	0.24
Market segment	Server	Desktop processor
Series	no data	Core i7 (Desktop)
Power efficiency	2.43	1.35
Architecture codename	Westmere-EP (2010−2011)	Bloomfield (2008−2010)
Release date	14 February 2011 (13 years ago)	November 2008 (16 years ago)
Launch price (MSRP)	$121	$299

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon X5687 has 1350% better value for money than i7-940.

Detailed specifications

Xeon X5687 and Core i7-940 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)	4 (Quad-Core)
Threads	8	8
Base clock speed	3.6 GHz	2.93 GHz
Boost clock speed	3.86 GHz	3.2 GHz
Bus rate	no data	1333 MHz
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	12 MB (shared)	8 MB (shared)
Chip lithography	32 nm	45 nm
Die size	239 mm2	263 mm2
Maximum core temperature	80 °C	68 °C
Number of transistors	1,170 million	731 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon X5687 and Core i7-940 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	FCLGA1366
Power consumption (TDP)	130 Watt	130 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon X5687 and Core i7-940. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	Intel® SSE4.2
AES-NI	+	-
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	1.0	1.0
Hyper-Threading Technology	+	+
Idle States	+	+
Demand Based Switching	+	-
PAE	40 Bit	36 Bit

Security technologies

Xeon X5687 and Core i7-940 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon X5687 and Core i7-940 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon X5687 and Core i7-940. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	288 GB	24 GB
Max memory channels	3	3
Maximum memory bandwidth	32 GB/s	25.6 GB/s
ECC memory support	+	-

Peripherals

Specifications and connection of peripherals supported by Xeon X5687 and Core i7-940.

PCIe version

2.0

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	3.47	1.93
Chip lithography	32 nm	45 nm

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Should you still have questions on choice between Xeon X5687 and Core i7-940, ask them in Comments section, and we shall answer.

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