Xeon D-1521 vs i7-8700K

Primary details

Comparing Core i7-8700K and Xeon D-1521 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	887	1519
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	4.55	2.60
Market segment	Desktop processor	Server
Series	Intel Core i7	Intel Xeon D
Power efficiency	8.53	7.52
Architecture codename	Coffee Lake-S (2017−2018)	Broadwell (2015−2019)
Release date	5 October 2017 (7 years ago)	1 November 2015 (9 years ago)
Launch price (MSRP)	$359	$199

Cost-effectiveness evaluation

Performance per price, higher is better.

i7-8700K has 75% better value for money than Xeon D-1521.

Detailed specifications

Core i7-8700K and Xeon D-1521 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	6 (Hexa-Core)	4 (Quad-Core)
Threads	12	8
Base clock speed	3.7 GHz	2.4 GHz
Boost clock speed	4.7 GHz	2.7 GHz
Bus type	DMI 3.0	DMI 2.0
Bus rate	4 × 8 GT/s	no data
Multiplier	37	24
L1 cache	64K (per core)	64K (per core)
L2 cache	256K (per core)	256K (per core)
L3 cache	12288 KB	1.5 MB (per core)
Chip lithography	14 nm	14 nm
Die size	149 mm2	246.24 mm2
Maximum core temperature	100 °C	no data
Maximum case temperature (TCase)	72 °C	80 °C
Number of transistors	no data	3,200 million
64 bit support	+	+
Windows 11 compatibility	+	-
Unlocked multiplier	+	-

Compatibility

Information on Core i7-8700K and Xeon D-1521 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)	1 (Uniprocessor)
Socket	FCLGA1151	FCBGA1667
Power consumption (TDP)	95 Watt	45 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-8700K and Xeon D-1521. You'll probably need this information if you require some particular technology.

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

Security technologies

Core i7-8700K and Xeon D-1521 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	+	+
MPX	+	-
Identity Protection	+	-
SGX	Yes with Intel® ME	no data
OS Guard	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-8700K and Xeon D-1521 are enumerated here.

AMD-V	+	-
VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-8700K and Xeon D-1521. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3, DDR4	DDR4, DDR3
Maximum memory size	128 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	42.671 GB/s	34.124 GB/s
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel UHD Graphics 630	no data
Max video memory	64 GB	no data
Quick Sync Video	+	-
Clear Video	+	no data
Clear Video HD	+	no data
Graphics max frequency	1.2 GHz	no data
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Core i7-8700K and Xeon D-1521 integrated GPUs.

Number of displays supported

3

no data

Graphics image quality

Maximum display resolutions supported by Core i7-8700K and Xeon D-1521 integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	no data
Max resolution over HDMI 1.4	4096 x 2304@24Hz	no data
Max resolution over eDP	4096 x 2304@60Hz	no data
Max resolution over DisplayPort	4096 x 2304@60Hz	no data

Graphics API support

APIs supported by Core i7-8700K and Xeon D-1521 integrated GPUs, sometimes API versions are included.

DirectX	12	no data
OpenGL	4.5	no data

Peripherals

Specifications and connection of peripherals supported by Core i7-8700K and Xeon D-1521.

PCIe version	3.0	2.0/3.0
PCI Express lanes	16	24
USB revision	no data	2.0/3.0
Total number of SATA ports	no data	6
Number of USB ports	no data	8
Integrated LAN	no data	+
UART	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	8.57	3.58
Recency	5 October 2017	1 November 2015
Physical cores	6	4
Threads	12	8
Power consumption (TDP)	95 Watt	45 Watt

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Should you still have questions on choice between Core i7-8700K and Xeon D-1521, ask them in Comments section, and we shall answer.

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