UserBenchmark: Intel Core i5-8400 vs i7-7820X

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IntelBX80673I77820X

BUY • $375

IntelBX80684I58400

BUY • $131

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Real World Speed

Performance profile from 340,744 user samples

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28,524 User Benchmarks

Best Bench: 92% Base clock 3.6 GHz, turbo 4.7 GHz (avg)
Worst Bench: 70% Base clock 3.6 GHz, turbo 3.85 GHz (avg)

Poor: 70% Great: 92%

SPEED RANK: 233^rd / 1442

Gaming 80%

Aircraft carrier

Desktop 81%

Aircraft carrier

Workstation 81%

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		80.1 %			81.8 %	+2%


Memory Avg. Memory Latency	75.5 Pts		84.9 Pts	Lower memory latency. +12%
1-Core Avg. Single Core Speed	121 Pts	Slightly faster single-core speed. +7%	113 Pts
2-Core Avg. Dual Core Speed	238 Pts	Slightly faster dual-core speed. +6%	224 Pts
4-Core Avg. Quad Core Speed	455 Pts	+5%	434 Pts
8-Core Avg. Octa Core Speed	822 Pts	Much faster octa-core speed. +46%	564 Pts


Memory OC Memory Latency	85 Pts		94.2 Pts	Lower OC memory latency. +11%
1-Core OC Single Core Speed	138 Pts	Faster OC single-core speed. +15%	120 Pts
2-Core OC Dual Core Speed	272 Pts	Faster OC dual-core speed. +15%	237 Pts
4-Core OC Quad Core Speed	533 Pts	Faster OC quad-core speed. +13%	471 Pts
8-Core OC Octa Core Speed	976 Pts	Much faster OC octa-core speed. +49%	657 Pts

Market Share

Based on 67,718,939 CPUs tested

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Market Share Market Share (trailing 30 days)	0.04 %		0.94 %	Insanely higher market share. +2,250%
Value Value For Money	73.8 %		101 %	Much better value. +36%
User Rating UBM User Rating	63 %	+3%	61 %
Price Price (score)	$375		$131	Much cheaper. +65%


Age Newest	81 Months		78 Months	+4%
TDP Thermal Design Power (TDP)	140 Watts		65 Watts	Much more energy efficient. +54%
Cores CPU Processing Cores	8 cores	Much higher core count. +33%	6 cores
Threads CPU Processing Threads	16 threads	Hugely higher thread count. +167%	6 threads
Lithography Manufacturing process	14 nm		14 nm
Base Clock Base Clock Speed	3.6 GHz	Faster base frequency. +29%	2.8 GHz
Turbo Clock Turbo Clock Speed	4.5 GHz	Faster turbo frequency. +12%	4 GHz
64-Core OC Multi Core Speed	1445 Pts	Hugely faster OC 64-core speed. +114%	675 Pts
64-Core Avg. Multi Core Speed	1263 Pts	Hugely faster 64-core speed. +115%	588 Pts


Series CPU Architecture	Skylake-X	Coffee Lake
Socket Motherboard Socket	LGA2066	FCLGA1151
Graphics Integrated Graphics	None	UHD 630
Launch Date Launch Date	Q2'17	Q4'17
Cache Cache	11 MB L3	9 MB
Instruction Set Extensions Instruction Set Extensions	SSE4.1/4.2, AVX 2.0, AVX-512	SSE4.1/4.2, AVX2
Recommended Price Recommended Customer Price	$589.00 - $599.00	N/A
Max Turbo Frequency Max Turbo Frequency	4.30 GHz	4.00 GHz
Thermal Solution Specification Thermal Solution Specification	PCG 2017X	PCG 2015C (65W)
Max Memory Size Max Memory Size (dependent on memory type)	128 GB	64 GB
Memory Channels Max # of Memory Channels	4	2
Hyper-Threading Tech Intel® Hyper-Threading Technology ‡	Yes	No
Max # of PCI Express Lanes Max # of PCI Express Lanes	28	16
	More specs »	More specs »

The I7-7820X is the second of three new Skylake-X HEDT (high end desktop processors) released by Intel as part of their core X series (the others being the flagship 10-core i9-7900X and the 6-core i7-7800X). The 7820X is an 8-core, 16-thread CPU which will amply satisfy all but the heaviest of multi-threaded use cases. The 7820X requires a relatively expensive X299 (Basin Falls) motherboard, which costs upwards of $250. The 7820X is listed at $599 which is about $200 more than AMD's current flagship 8-core, 16 thread Ryzen 7 1800X. In addition to better IPC, the 7820X is higher clocked with base and max boost clocks of 3.6/4.5 GHz respectively, compared to 3.6G/4.0 GHz for the Ryzen 7 1800X. The additional $200 (50%) buys you around 20% more performance in both single and multi core workloads. Intel have also released several Kabylake-X HEDT CPUs: the 4-thread i5-7640X and the 8-thread i7-7740X and will shortly release of even higher spec Skylake-X processors. It's probably wise to hold off purchasing until the eagerly anticipated 16-core, 32-thread Ryzen Threadripper CPUs are launched later this month. ^{[Jul '17 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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