Xeon E5640 vs i7-6800K

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Aggregate performance score

Core i7-6800K
2016
6 cores / 12 threads, 140 Watt
6.76
+184%
Xeon E5640
2010
4 cores / 8 threads, 80 Watt
2.38

Core i7-6800K outperforms Xeon E5640 by a whopping 184% based on our aggregate benchmark results.

Primary details

Comparing Core i7-6800K and Xeon E5640 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking10341793
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation1.690.85
Market segmentDesktop processorServer
Power efficiency4.572.82
Architecture codenameBroadwell-E (2016)Westmere-EP (2010−2011)
Release date31 May 2016 (8 years ago)16 March 2010 (14 years ago)
Launch price (MSRP)$345$49

Cost-effectiveness evaluation

Performance per price, higher is better.

i7-6800K has 99% better value for money than Xeon E5640.

Detailed specifications

Core i7-6800K and Xeon E5640 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 cores6 (Hexa-Core)4 (Quad-Core)
Threads128
Base clock speed3.4 GHz2.66 GHz
Boost clock speed3.8 GHz2.93 GHz
L1 cache32 KB (per core)64 KB (per core)
L2 cache256 KB (per core)256 KB (per core)
L3 cache15 MB (shared)12 MB (shared)
Chip lithography14 nm32 nm
Die sizeno data239 mm2
Maximum core temperatureno data78 °C
Maximum case temperature (TCase)72 °Cno data
Number of transistorsno data1,170 million
64 bit support++
Windows 11 compatibility--
Unlocked multiplier+-

Compatibility

Information on Core i7-6800K and Xeon E5640 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 configuration12
SocketFCLGA2011FCLGA1366,LGA1366
Power consumption (TDP)140 Watt80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-6800K and Xeon E5640. You'll probably need this information if you require some particular technology.

Instruction set extensionsno dataIntel® SSE4.2
AES-NI++
AVX+-
Enhanced SpeedStep (EIST)++
Turbo Boost Technology2.01.0
Hyper-Threading Technology++
Idle States++
Smart Response+no data
Demand Based Switchingno data+
PAEno data40 Bit
Turbo Boost Max 3.0+no data

Security technologies

Core i7-6800K and Xeon E5640 technologies aimed at improving security, for example, by protecting against hacks.

TXT++
EDB++

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-6800K and Xeon E5640 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-6800K and Xeon E5640. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4DDR3
Maximum memory size128 GB288 GB
Max memory channels43
Maximum memory bandwidthno data25.6 GB/s
ECC memory support-+

Peripherals

Specifications and connection of peripherals supported by Core i7-6800K and Xeon E5640.

PCIe version3.02.0
PCI Express lanes28no 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.


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.

i7-6800K 6.76
+184%
Xeon E5640 2.38

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

i7-6800K 10739
+184%
Xeon E5640 3782

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

i7-6800K 1237
+251%
Xeon E5640 352

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

i7-6800K 5665
+280%
Xeon E5640 1489

Gaming performance

Pros & cons summary


Performance score 6.76 2.38
Recency 31 May 2016 16 March 2010
Physical cores 6 4
Threads 12 8
Chip lithography 14 nm 32 nm
Power consumption (TDP) 140 Watt 80 Watt

i7-6800K has a 184% higher aggregate performance score, an age advantage of 6 years, 50% more physical cores and 50% more threads, and a 128.6% more advanced lithography process.

Xeon E5640, on the other hand, has 75% lower power consumption.

The Core i7-6800K is our recommended choice as it beats the Xeon E5640 in performance tests.

Note that Core i7-6800K is a desktop processor while Xeon E5640 is a server/workstation one.


Should you still have questions on choice between Core i7-6800K and Xeon E5640, ask them in Comments section, and we shall answer.

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Intel Core i7-6800K
Core i7-6800K
Intel Xeon E5640
Xeon E5640

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Community ratings

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Questions & comments

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