Xeon X5660 vs i9-7900X

Primary details

Comparing Core i9-7900X and Xeon X5660 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	569	1480
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.96	3.05
Market segment	Desktop processor	Server
Series	Core i9 (Desktop)	no data
Power efficiency	8.96	3.78
Architecture codename	Skylake (server) (2017−2018)	Westmere-EP (2010−2011)
Release date	26 June 2017 (7 years ago)	16 March 2010 (14 years ago)
Launch price (MSRP)	$999	$33

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon X5660 has 3% better value for money than i9-7900X.

Detailed specifications

Core i9-7900X and Xeon X5660 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	10 (Deca-Core)	6 (Hexa-Core)
Threads	20	12
Base clock speed	3.3 GHz	2.8 GHz
Boost clock speed	4.5 GHz	3.2 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	no data
Multiplier	33	no data
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	1 MB (per core)	256 KB (per core)
L3 cache	14 MB (shared)	12 MB (shared)
Chip lithography	14 nm	32 nm
Die size	no data	239 mm2
Maximum core temperature	95 °C	81 °C
Maximum case temperature (TCase)	72 °C	no data
Number of transistors	no data	1,170 million
64 bit support	+	+
Windows 11 compatibility	+	-
Unlocked multiplier	+	-

Compatibility

Information on Core i9-7900X and Xeon X5660 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 (Uniprocessor)	2
Socket	Socket R4	FCLGA1366,LGA1366
Power consumption (TDP)	140 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-7900X and Xeon X5660. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512	Intel® SSE4.2
AES-NI	+	+
AVX	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	1.0
Hyper-Threading Technology	+	+
TSX	+	-
Idle States	no data	+
Demand Based Switching	no data	+
PAE	no data	40 Bit
Turbo Boost Max 3.0	+	no data

Security technologies

Core i9-7900X and Xeon X5660 technologies aimed at improving security, for example, by protecting against hacks.

TXT	no data	+
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-7900X and Xeon X5660 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-7900X and Xeon X5660. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR3
Maximum memory size	128 GB	288 GB
Max memory channels	4	3
Maximum memory bandwidth	85.33 GB/s	32 GB/s
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

no data

Peripherals

Specifications and connection of peripherals supported by Core i9-7900X and Xeon X5660.

PCIe version	3.0	2.0
PCI Express lanes	44	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	13.24	3.79
Recency	26 June 2017	16 March 2010
Physical cores	10	6
Threads	20	12
Chip lithography	14 nm	32 nm
Power consumption (TDP)	140 Watt	95 Watt

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Should you still have questions on choice between Core i9-7900X and Xeon X5660, ask them in Comments section, and we shall answer.

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