Core 2 Quad Q8400 vs Core i7-6950X

Primary details

Comparing Core i7-6950X and Core 2 Quad Q8400 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	706	2263
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.85	no data
Market segment	Desktop processor	Desktop processor
Series	Intel Core i7 (Desktop)	no data
Power efficiency	7.39	1.30
Architecture codename	Broadwell-E (2016)	Yorkfield (2007−2009)
Release date	31 May 2016 (8 years ago)	19 April 2009 (15 years ago)
Launch price (MSRP)	$1,723	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-6950X and Core 2 Quad Q8400 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 GHz	2.66 GHz
Boost clock speed	4 GHz	0.67 GHz
Bus rate	9.6 GT/s / QPI	1333 MHz
L1 cache	32K (per core)	64 KB (per core)
L2 cache	256K (per core)	4 MB (shared)
L3 cache	25 MB (shared)	0 KB
Chip lithography	14 nm	45 nm
Die size	246 mm2	2x 82 mm2
Maximum case temperature (TCase)	72 °C	71 °C
Number of transistors	3,800 million	456 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	+	-
VID voltage range	no data	0.85V-1.3625V

Compatibility

Information on Core i7-6950X and Core 2 Quad Q8400 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
Socket	FCLGA2011	FCLGA775,LGA775
Power consumption (TDP)	140 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-6950X and Core 2 Quad Q8400. You'll probably need this information if you require some particular technology.

AES-NI	+	-
AVX	+	-
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	-
Hyper-Threading Technology	+	-
Idle States	+	+
Thermal Monitoring	-	+
Smart Response	+	no data
Demand Based Switching	no data	-
Turbo Boost Max 3.0	+	no data
FSB parity	no data	-

Security technologies

Core i7-6950X and Core 2 Quad Q8400 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-6950X and Core 2 Quad Q8400 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-6950X and Core 2 Quad Q8400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR1, DDR2, DDR3
Maximum memory size	128 GB	no data
Max memory channels	4	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

On certain motherboards (Chipset feature)

Peripherals

Specifications and connection of peripherals supported by Core i7-6950X and Core 2 Quad Q8400.

PCIe version	3.0	2.0
PCI Express lanes	40	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	11.35	1.35
Recency	31 May 2016	19 April 2009
Physical cores	10	4
Threads	20	4
Chip lithography	14 nm	45 nm
Power consumption (TDP)	140 Watt	95 Watt

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Should you still have questions on choice between Core i7-6950X and Core 2 Quad Q8400, ask them in Comments section, and we shall answer.

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