i7-6785R vs i7-975

Primary details

Comparing Core i7-975 and Core i7-6785R processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1833	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.10	no data
Market segment	Desktop processor	Desktop processor
Series	Core i7 (Desktop)	Intel Core i7
Power efficiency	1.60	no data
Architecture codename	Bloomfield (2008−2010)	Skylake (2015−2016)
Release date	2 June 2009 (15 years ago)	3 May 2016 (8 years ago)
Launch price (MSRP)	$476	$370

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-975 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	4 (Quad-Core)	4 (Quad-Core)
Threads	8	8
Base clock speed	3.33 GHz	3.3 GHz
Boost clock speed	3.6 GHz	3.9 GHz
Bus type	no data	DMI 3.0
Bus rate	1333 MHz	4 × 8 GT/s
Multiplier	no data	33
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	8 MB (shared)	8 MB (shared)
Chip lithography	45 nm	14 nm
Die size	263 mm2	no data
Maximum case temperature (TCase)	68 °C	71 °C
Number of transistors	731 million	no data
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	+	-

Compatibility

Information on Core i7-975 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	1 (Uniprocessor)
Socket	FCLGA1366	FCBGA1440
Power consumption (TDP)	130 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-975 and Core i7-6785R. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
eDRAM	no data	128 MB
Turbo Boost Technology	1.0	2.0
Hyper-Threading Technology	+	+
TSX	-	+
Idle States	+	+
Thermal Monitoring	-	+
Demand Based Switching	-	no data
PAE	36 Bit	no data

Security technologies

Core i7-975 and Core i7-6785R technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
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 i7-975 and Core i7-6785R are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-975 and Core i7-6785R. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4-1866/2133, DDR3L-1333/1600
Maximum memory size	24 GB	64 GB
Max memory channels	3	2
Maximum memory bandwidth	25.6 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 i7-975 and Core i7-6785R 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 i7-975 and Core i7-6785R 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 i7-975 and Core i7-6785R 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 i7-975 and Core i7-6785R.

PCIe version	2.0	3.0
PCI Express lanes	no data	16

Pros & cons summary

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Recency	2 June 2009	3 May 2016
Chip lithography	45 nm	14 nm
Power consumption (TDP)	130 Watt	65 Watt

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Should you still have questions on choice between Core i7-975 and Core i7-6785R, ask them in Comments section, and we shall answer.

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