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IntelBX80671I76800K
IntelBX80684I58400
▲ 659,589 ▼

6 Cores, 12 Threads @3.4GHz, Broadwell-E.
Release date: Q2 2016.

VS
▲ 615,304 ▼

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

Effective Speed 
+1%
Real World Speed
Performance profile from 362,416 user samples
Benchmark your CPU here
50,196 User Benchmarks
Best Bench: 90% Base clock 3.4 GHz, turbo 4.1 GHz (avg)
Worst Bench: 71% Base clock 3.4 GHz, turbo 1.2 GHz (avg)
Poor: 71% Great: 90%
SPEED RANK: 221st / 1442
Gaming
Gaming 81%
Aircraft carrier
Desktop
Desktop 82%
Aircraft carrier
Workstation
Workstation 71%
Battleship
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: 212th / 1442
Gaming
Gaming 82%
Aircraft carrier
Desktop
Desktop 83%
Aircraft carrier
Workstation
Workstation 66%
Battle cruiser
Effective Speed
Effective CPU Speed 		80.9 % 81.8 % +1%
Average Score 
+0%
Memory
Avg. Memory Latency 		86 Pts +1% 84.9 Pts
1-Core
Avg. Single Core Speed 		107 Pts 113 Pts Slightly faster single-core speed.
+6%
2-Core
Avg. Dual Core Speed 		214 Pts 224 Pts +5%
4-Core
Avg. Quad Core Speed 		408 Pts 434 Pts Slightly faster quad-core speed.
+6%
8-Core
Avg. Octa Core Speed 		660 Pts Faster octa-core speed.
+17% 		564 Pts
Overclocked Score 
+6%
Memory
OC Memory Latency 		94.9 Pts +1% 94.2 Pts
1-Core
OC Single Core Speed 		124 Pts +3% 120 Pts
2-Core
OC Dual Core Speed 		248 Pts +5% 237 Pts
4-Core
OC Quad Core Speed 		483 Pts +3% 471 Pts
8-Core
OC Octa Core Speed 		770 Pts Faster OC octa-core speed.
+17% 		657 Pts
Value & Sentiment 
+299%
Market Share
Based on 67,719,158 CPUs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.07 % 0.95 % Insanely higher market share.
+1,257%
Value
Value For Money 		115 % Better value.
+14% 		101 %
User Rating
UBM User Rating 		65 % Slightly more popular.
+7% 		61 %
Price
Price (score) 		$78 Much cheaper.
+40% 		$131
Nice To Haves 
+14%
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 		6 cores 6 cores
Threads
CPU Processing Threads 		12 threads Hugely higher thread count.
+100% 		6 threads
Lithography
Manufacturing process 		14 nm 14 nm
Base Clock
Base Clock Speed 		3.4 GHz Faster base frequency.
+21% 		2.8 GHz
Turbo Clock
Turbo Clock Speed 		3.8 GHz 4 GHz Slightly faster turbo frequency.
+5%
64-Core
OC Multi Core Speed 		956 Pts Much faster OC 64-core speed.
+42% 		675 Pts
64-Core
Avg. Multi Core Speed 		827 Pts Much faster 64-core speed.
+41% 		588 Pts
Specifications 
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 		15 MB 9 MB
Max Turbo Frequency
Max Turbo Frequency 		3.8 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 		28 16

More specs » More specs »
Conclusion 
Average Bench 80.9%
Average Bench 81.8%
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The Core i7-6800K is the weakest of four new 14 nm Broadwell-E prosumer CPUs. This model has six cores with base and turbo frequencies of 3.4 and 3.8 GHz, a TDP of 140 watts and 28 PCIe 3.0 lanes. The 6800K closely matches, and supersedes, the very popular Haswell-E 5820K. Because of its MSRP of around $500, this CPU only makes sense for niche use cases which include graphics design, video production or multi GPU gaming. Comparing the 6800K and 6700K shows that for typical desktop use, at stock clocks, the 6800K actually lags the 6700K by around 10%. This is because desktop computing largely depends on single core performance and the Skylake i7-6700K is both clocked higher (Base clock 4.0 GHz vs 3.4 GHz) and has higher IPC due to its one generation lead over the 6800K. If the 6800K proves to be a capable overclocker then it may challenge the 6700K on a range of core-heavy use cases, time will tell. [Jun '16 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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