UserBenchmark: Intel Core i5-8400 vs i7-6950X

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IntelBX80671I76950X

BUY • $499

IntelBX80684I58400

BUY • $131

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Real World Speed

Performance profile from 318,355 user samples

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6,135 User Benchmarks

Best Bench: 100% Base clock 3 GHz, turbo 4.55 GHz (avg)
Worst Bench: 77% Base clock 3 GHz, turbo 1.25 GHz (avg)

Poor: 77% Great: 100%

SPEED RANK: 164^th / 1442

Gaming 87%

Aircraft carrier

Desktop 86%

Aircraft carrier

Workstation 90%

Aircraft carrier

312,220 User Benchmarks

Best Bench: 89% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 61% Base clock 2.8 GHz, turbo 0.8 GHz (avg)

Poor: 61% Great: 89%

SPEED RANK: 212^th / 1442

Gaming 82%

Aircraft carrier

Desktop 83%

Aircraft carrier

Workstation 66%

Battle cruiser


Effective Speed Effective CPU Speed		86.8 %	Slightly faster effective speed. +6%		81.8 %


Memory Avg. Memory Latency	88.2 Pts	+4%	84.9 Pts
1-Core Avg. Single Core Speed	114 Pts	+1%	113 Pts
2-Core Avg. Dual Core Speed	228 Pts	+2%	224 Pts
4-Core Avg. Quad Core Speed	458 Pts	Slightly faster quad-core speed. +6%	434 Pts
8-Core Avg. Octa Core Speed	884 Pts	Much faster octa-core speed. +57%	564 Pts


Memory OC Memory Latency	95.9 Pts	+2%	94.2 Pts
1-Core OC Single Core Speed	142 Pts	Faster OC single-core speed. +18%	120 Pts
2-Core OC Dual Core Speed	283 Pts	Faster OC dual-core speed. +19%	237 Pts
4-Core OC Quad Core Speed	565 Pts	Faster OC quad-core speed. +20%	471 Pts
8-Core OC Octa Core Speed	1118 Pts	Much faster OC octa-core speed. +70%	657 Pts

Market Share

Based on 67,718,939 CPUs tested

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Market Share Market Share (trailing 30 days)	0.02 %		0.94 %	Insanely higher market share. +4,600%
Value Value For Money	73.9 %		101 %	Much better value. +36%
User Rating UBM User Rating	62 %	+2%	61 %
Price Price (score)	$499		$131	Much cheaper. +74%


Age Newest	94 Months		78 Months	More recent. +17%
TDP Thermal Design Power (TDP)	140 Watts		65 Watts	Much more energy efficient. +54%
Cores CPU Processing Cores	10 cores	Much higher core count. +67%	6 cores
Threads CPU Processing Threads	20 threads	Hugely higher thread count. +233%	6 threads
Lithography Manufacturing process	14 nm		14 nm
Base Clock Base Clock Speed	3 GHz	Slightly faster base frequency. +7%	2.8 GHz
Turbo Clock Turbo Clock Speed	4 GHz		4 GHz
64-Core OC Multi Core Speed	1799 Pts	Hugely faster OC 64-core speed. +167%	675 Pts
64-Core Avg. Multi Core Speed	1470 Pts	Hugely faster 64-core speed. +150%	588 Pts


Series CPU Architecture	Broadwell-E	Coffee Lake
Socket Motherboard Socket	LGA2011-V3	FCLGA1151
Graphics Integrated Graphics	None	UHD 630
Launch Date Launch Date	Q2'16	Q4'17
Cache Cache	25 MB	9 MB
Max Turbo Frequency Max Turbo Frequency	4 GHz	4.00 GHz
Max Memory Size Max Memory Size (dependent on memory type)	128 GB	64 GB
Memory Types Memory Types	DDR4 2400/2133	DDR4-2666
Memory Channels Max # of Memory Channels	4	2
Processor Graphics Processor Graphics ‡	None	Intel® UHD Graphics 630
Hyper-Threading Tech Intel® Hyper-Threading Technology ‡	Yes	No
Max # of PCI Express Lanes Max # of PCI Express Lanes	40	16
	More specs »	More specs »

The Core i7-6950X is Intel’s new top of the range prosumer CPU. This flagship model has a whopping ten cores with base and turbo frequencies of 3.0 and 4.0 GHz respectively. The 6950X is based on the 14 nm Broadwell-E architecture. It has a TDP of 140 watts, 40 PCIe 3.0 lanes and no integrated graphics. Because of its ridiculously high MSRP of around $2,000, this CPU only makes sense for very niche use cases which could include top end graphics design or video production workstations. Comparing the 6950X and 6700K shows that for typical desktop use the 6950X only offers a gain of around 20% for a whopping 6 fold price increase. This is because desktop computing largely depends on single core performance and the Skylake i7-6700K is both clocked higher and has higher IPC due to its one generation lead over the 6950X. That said, if you want the most powerful desktop processor money can buy, then the 6950X hits the spot. ^{[Jun '16 CPUPro]}

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The i5-8400 is a competitively priced hex-core processor from Intel’s 8th generation of Core processors (Coffee Lake). Along with the release of the unlocked i5-8600K, this is the first time that six-core processors have featured in the i5 line-up. Like the other Coffee Lake processors, the i5-8400 is based upon an improved version of Intel’s 14nm architecture which featured in both Skylake and Kaby Lake. Early benchmarks reveal that for average quad core usage (most games employ a maximum of four cores) the i5-8400 performs way above its pay grade. It achieves quad core mixed speeds close to Intel’s outgoing 2017 flagship the $300, quad-core, 8 thread i7-7700k, which to date has been a strong favourite for high-end gaming setups. On paper, the i5-8400 has a base clock of 2.8 GHz (Intel are significantly downplaying the performance of this SKU by giving it a relatively low nominal base clock), an all core boost of 3.8 GHz (this is the effective base clock figure that counts) and a single core boost of 4 GHz. This compares reasonably well to the i5-8600K which has a base clock of 3.6 GHz, all core boost of 4.1 GHz and a single core boost of 4.3 GHz. The i5-8400 also features 9MB of L3 cache and an energy-thrifty TDP of 65W. Priced at under $190, the i5-8400 offers fantastic value for money. Unfortunately, like the other Coffee Lake processors, the i5-8400 will require a new 300 series motherboard, and at the time of writing, the only available version is Intel’s high-end Z370 which isn't an ideal pairing for the i5-8400. The Z series motherboards are designed to cater for the unlocked and overclockable "K" SKUs. Cheaper 300 series motherboards will be available in 2018 at which time the 8400 will offer even better value for money. ^{[Oct '17 CPUPro]}

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CPU	GPU	SSD
Intel Core i5-13600K $279	Nvidia RTX 4060 $300	Crucial MX500 250GB $40
Intel Core i5-12400F $133	Nvidia RTX 4060-Ti $385	Samsung 850 Evo 120GB $80
Intel Core i5-12600K $182	Nvidia RTX 4070 $409	Samsung 860 Evo 250GB $52

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $39	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $30	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43	SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51	G.SKILL Trident Z DDR4 3200 C14 4x16GB $351	SanDisk Ultra Fit 32GB $16

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