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IntelBX80662I76700K
IntelBX80684I58400
▲ 7947,235 ▼

4 Cores, 8 Threads @4.0GHz, Skylake.
Release date: Q3 2015.

VS
▲ 625,402 ▼

6 Cores, 6 Threads @2.8GHz, Coffee Lake.
Release date: Q4 2017.

Effective Speed 
+1%
Real World Speed
Performance profile from 901,198 user samples
Benchmark your CPU here
588,978 User Benchmarks
Best Bench: 90% Base clock 4 GHz, turbo 4.8 GHz (avg)
Worst Bench: 70% Base clock 4 GHz, turbo 0.8 GHz (avg)
Poor: 70% Great: 90%
SPEED RANK: 243rd / 1468
Gaming
Gaming 81%
Aircraft carrier
Desktop
Desktop 85%
Aircraft carrier
Workstation
Workstation 67%
Battle cruiser
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: 231st / 1468
Gaming
Gaming 82%
Aircraft carrier
Desktop
Desktop 83%
Aircraft carrier
Workstation
Workstation 66%
Battle cruiser
Effective Speed
Effective CPU Speed 		80.8 % 81.8 % +1%
Average Score 
+1%
Memory
Avg. Memory Latency 		88.6 Pts +4% 84.9 Pts
1-Core
Avg. Single Core Speed 		119 Pts Slightly faster single-core speed.
+5% 		113 Pts
2-Core
Avg. Dual Core Speed 		224 Pts 224 Pts
4-Core
Avg. Quad Core Speed 		395 Pts 434 Pts Slightly faster quad-core speed.
+10%
8-Core
Avg. Octa Core Speed 		597 Pts Slightly faster octa-core speed.
+6% 		564 Pts
Overclocked Score 
+6%
Memory
OC Memory Latency 		95.9 Pts +2% 94.2 Pts
1-Core
OC Single Core Speed 		137 Pts Faster OC single-core speed.
+14% 		120 Pts
2-Core
OC Dual Core Speed 		258 Pts Slightly faster OC dual-core speed.
+9% 		237 Pts
4-Core
OC Quad Core Speed 		459 Pts 471 Pts +3%
8-Core
OC Octa Core Speed 		696 Pts Slightly faster OC octa-core speed.
+6% 		657 Pts
Value & Sentiment 
+3%
Market Share
Based on 69,051,918 CPUs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.82 % 0.85 % +4%
Value
Value For Money 		100 % 104 % +4%
User Rating
UBM User Rating 		79 % More popular.
+27% 		62 %
Price
Price (score) 		$127 $115 Slightly cheaper.
+10%
Nice To Haves 
+1%
Age
Newest 		111 Months 85 Months More recent.
+23%
TDP
Thermal Design Power (TDP) 		91 Watts 65 Watts More energy efficient.
+29%
Cores
CPU Processing Cores 		4 cores 6 cores Much higher core count.
+50%
Threads
CPU Processing Threads 		8 threads Much higher thread count.
+33% 		6 threads
Lithography
Manufacturing process 		14 nm 14 nm
Base Clock
Base Clock Speed 		4 GHz Much faster base frequency.
+43% 		2.8 GHz
Turbo Clock
Turbo Clock Speed 		4.2 GHz +5% 4 GHz
64-Core
OC Multi Core Speed 		716 Pts Slightly faster OC 64-core speed.
+6% 		675 Pts
64-Core
Avg. Multi Core Speed 		612 Pts +4% 588 Pts
Specifications 
Series
CPU Architecture 		Skylake Coffee Lake
Socket
Motherboard Socket 		FCLGA1151 FCLGA1151
Graphics
Integrated Graphics 		HD 530 UHD 630
Launch Date
Launch Date 		Q3'15 Q4'17
Cache
Cache 		8 MB SmartCache 9 MB
Instruction Set Extensions
Instruction Set Extensions 		SSE4.1/4.2, AVX 2.0 SSE4.1/4.2, AVX2
Recommended Price
Recommended Customer Price 		$339.00 - $350.00 N/A
Max Turbo Frequency
Max Turbo Frequency 		4.2 GHz 4.00 GHz
Thermal Solution Specification
Thermal Solution Specification 		PCG 2015D (130W) PCG 2015C (65W)
Memory Types
Memory Types 		DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V DDR4-2666
Processor Graphics
Processor Graphics ‡ 		Intel® HD Graphics 530 Intel® UHD Graphics 630
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency 		1.15 GHz 1.05 GHz
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡ 		Yes No
TSX-NI
Intel® TSX-NI 		Yes No
PCI Express Configurations
PCI Express Configurations ‡ 		Up to 1x16, 2x8, 1x8+2x4 Up to 1x16 or 2x8 or 1x8+2x4

More specs » More specs »
Conclusion 
Average Bench 80.8%
Average Bench 81.8%

The Core i7-6700K is Intel's latest "Skylake" flagship processor. It replaces the hugely successful i7-4790K and takes the crown as the fastest mainstream consumer CPU available. Comparing performance and specs between the 4790K and 6700K shows that the configuration is largely unchanged (same base clocks, cores, threads) but the improved manufacturing process (14nm) brings a small reduction in TDP and a performance improvement of 8%; almost exactly the same jump as between the Ivy Bridge 3770K and Haswell 4770K. Owners of any unlocked-K Intel CPU from Sandy Bridge or onwards still have no real reason to upgrade as the performance improvements are largely academic but the i7-6700K will be the CPU of choice for the vast majority of top end PC builds in 2015. [Aug '15 CPUPro]

MORE DETAILS

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]

MORE DETAILS

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