i5-6685R vs i9-7900X

Primary details

Comparing Core i9-7900X and Core i5-6685R processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	556	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.05	no data
Market segment	Desktop processor	Desktop processor
Series	Core i9 (Desktop)	Intel Core i5
Power efficiency	8.96	no data
Architecture codename	Skylake (server) (2017−2019)	Skylake (2015−2016)
Release date	30 May 2017 (7 years ago)	22 April 2016 (8 years ago)
Launch price (MSRP)	$999	$288

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i9-7900X and Core i5-6685R 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)	4 (Quad-Core)
Threads	20	4
Base clock speed	3.3 GHz	3.2 GHz
Boost clock speed	4.5 GHz	3.8 GHz
Bus type	DMI 3.0	DMI 3.0
Bus rate	4 × 8 GT/s	4 × 8 GT/s
Multiplier	33	32
L1 cache	640 KB	256 KB
L2 cache	10 MB	1 MB
L3 cache	13.75 MB	6 MB
Chip lithography	14 nm	14 nm
Maximum core temperature	95 °C	71 °C
Maximum case temperature (TCase)	72 °C	no data
64 bit support	+	+
Windows 11 compatibility	+	-
Unlocked multiplier	+	-

Compatibility

Information on Core i9-7900X and Core i5-6685R 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	Socket R4	no data
Power consumption (TDP)	140 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-7900X and Core i5-6685R. 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® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	+	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
eDRAM	no data	128 MB
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	-
TSX	+	+
Idle States	no data	+
Thermal Monitoring	-	+
Turbo Boost Max 3.0	+	no data

Security technologies

Core i9-7900X and Core i5-6685R technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-7900X and Core i5-6685R 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 Core i5-6685R. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR4-1866/2133, DDR3L-1333/1600
Maximum memory size	128 GB	64 GB
Max memory channels	4	2
Maximum memory bandwidth	85.33 GB/s	34.134 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	N/A	Intel Iris Pro Graphics 580
Max video memory	no data	64 GB
Quick Sync Video	-	+
Clear Video	no data	+
Clear Video HD	no data	+
Graphics max frequency	no data	1.15 GHz
InTru 3D	no data	+

Graphics interfaces

Available interfaces and connections of Core i9-7900X and Core i5-6685R integrated GPUs.

Number of displays supported	no data	3
eDP	no data	+
DisplayPort	-	+
HDMI	-	+
DVI	no data	+

Graphics image quality

Maximum display resolutions supported by Core i9-7900X and Core i5-6685R integrated GPUs, including resolutions over different interfaces.

4K resolution support	no data	+
Max resolution over HDMI 1.4	no data	4096x2304@24Hz
Max resolution over eDP	no data	4096x2304@60Hz
Max resolution over DisplayPort	no data	4096x2304@60Hz
Max resolution over VGA	no data	N/A

Graphics API support

APIs supported by Core i9-7900X and Core i5-6685R integrated GPUs, sometimes API versions are included.

DirectX	no data	12
OpenGL	no data	4.5

Peripherals

Specifications and connection of peripherals supported by Core i9-7900X and Core i5-6685R.

PCIe version	3.0	3.0
PCI Express lanes	44	16

Pros & cons summary

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Recency	30 May 2017	22 April 2016
Physical cores	10	4
Threads	20	4
Power consumption (TDP)	140 Watt	65 Watt

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Should you still have questions on choice between Core i9-7900X and Core i5-6685R, ask them in Comments section, and we shall answer.

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