Core i7-6785R vs Ryzen 9 3900X

Primary details

Comparing Ryzen 9 3900X and Core i7-6785R processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	238	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	33.37	no data
Market segment	Desktop processor	Desktop processor
Series	AMD Ryzen 9	Intel Core i7
Architecture codename	Matisse (Zen 2) (2019−2020)	Skylake (2015−2016)
Release date	7 July 2019 (4 years ago)	22 April 2016 (8 years ago)
Launch price (MSRP)	$499	$370
Current price	$403 (0.8x MSRP)	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Ryzen 9 3900X and Core i7-6785R 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	12 (Dodeca-Core)	4 (Quad-Core)
Threads	24	8
Base clock speed	3.8 GHz	3.3 GHz
Boost clock speed	4.6 GHz	3.9 GHz
Bus support	no data	4 × 8 GT/s
L1 cache	96K (per core)	256 KB
L2 cache	512K (per core)	1 MB
L3 cache	64 MB	8 MB
Chip lithography	7 nm	14 nm
Maximum core temperature	95 °C	71 °C
Number of transistors	19,200 million	no data
64 bit support	+	+
Windows 11 compatibility	+	-
Unlocked multiplier	Yes	No

Compatibility

Information on Ryzen 9 3900X and Core i7-6785R 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
Socket	AM4	FCBGA1440
Power consumption (TDP)	125 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 3900X and Core i7-6785R. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	no data	+
eDRAM	no data	128 MB
Turbo Boost Technology	no data	2.0
Hyper-Threading Technology	no data	+
TSX	no data	+
Idle States	no data	+
Thermal Monitoring	no data	+
SIPP	no data	-
Status	no data	Discontinued

Security technologies

Ryzen 9 3900X and Core i7-6785R technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 3900X and Core i7-6785R are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3900X and Core i7-6785R. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Dual-channel	DDR4-1866, DDR4-2133, DDR3L-1333, DDR3L-1600
Maximum memory size	128 GB	64 GB
Max memory channels	2	2
Maximum memory bandwidth	51.196 GB/s	34.1 GB/s
ECC memory support	-	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	-	Intel Iris Pro Graphics 580
Max video memory	-	64 GB
Quick Sync Video	-	+
Clear Video	-	+
Clear Video HD	-	+
Graphics max frequency	-	1.15 GHz
InTru 3D	-	+

Graphics interfaces

Available interfaces and connections of Ryzen 9 3900X and Core i7-6785R integrated GPUs.

Number of displays supported	-	3
eDP	-	+
DisplayPort	-	+
HDMI	-	+
DVI	-	+

Graphics image quality

Maximum display resolutions supported by Ryzen 9 3900X and Core i7-6785R integrated GPUs, including resolutions over different interfaces.

4K resolution support	-	+
Max resolution over HDMI 1.4	-	4096x2304@24Hz
Max resolution over eDP	-	4096x2304@60Hz
Max resolution over DisplayPort	-	4096x2304@60Hz
Max resolution over VGA	-	N/A

Graphics API support

APIs supported by Ryzen 9 3900X and Core i7-6785R integrated GPUs, sometimes API versions are included.

DirectX	-	12
OpenGL	-	4.5

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 3900X and Core i7-6785R.

PCIe version	no data	3.0
PCI Express lanes	no data	16

Pros & cons summary

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Recency	7 July 2019	22 April 2016
Physical cores	12	4
Threads	24	8
Cost	$499	$370
Chip lithography	7 nm	14 nm
Power consumption (TDP)	125 Watt	65 Watt

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Should you still have questions on choice between Ryzen 9 3900X and Core i7-6785R, ask them in Comments section, and we shall answer.

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