IntelBX80684I78700K
IntelBX80671I76800K

6 Cores, 12 Threads @3.7GHz, Coffee Lake.
Release date: Q4 2017.

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

Real World Speed
Performance profile from 447,517 user samples
420,955 User Benchmarks
Best Bench: 104% Base clock 3.7 GHz, turbo 5.35 GHz (avg)
Worst Bench: 81% Base clock 3.7 GHz, turbo 4.3 GHz (avg)
Poor: 81% Great: 104%
SPEED RANK: 23rd / 1258
Gaming
Gaming 94%
Nuclear submarine
Desktop
Desktop 95%
Nuclear submarine
Workstation
Workstation 85%
Aircraft carrier
26,562 User Benchmarks
Best Bench: 93% Base clock 3.4 GHz, turbo 3.85 GHz (avg)
Worst Bench: 74% Base clock 3.4 GHz, turbo 1.55 GHz (avg)
Poor: 74% Great: 93%
SPEED RANK: 91st / 1258
Gaming
Gaming 84%
Aircraft carrier
Desktop
Desktop 85%
Aircraft carrier
Workstation
Workstation 74%
Battleship
Effective Speed
Effective CPU Speed
93.6 % Faster effective speed.
+11%
84 %
Memory
Avg. Memory Latency
92.9 Pts +4% 89.5 Pts
1-Core
Avg. Single Core Mixed Speed
135 Pts Faster single-core speed.
+24%
109 Pts
2-Core
Avg. Dual Core Mixed Speed
264 Pts Faster dual-core speed.
+21%
218 Pts
4-Core
Avg. Quad Core Mixed Speed
508 Pts Faster quad-core speed.
+20%
423 Pts
8-Core
Avg. Octa Core Mixed Speed
818 Pts Faster octa-core speed.
+21%
677 Pts
Memory
OC Memory Latency
97.4 Pts +1% 96.3 Pts
1-Core
OC Single Core Mixed Speed
153 Pts Faster OC single-core speed.
+20%
128 Pts
2-Core
OC Dual Core Mixed Speed
303 Pts Faster OC dual-core speed.
+20%
253 Pts
4-Core
OC Quad Core Mixed Speed
601 Pts Faster OC quad-core speed.
+19%
503 Pts
8-Core
OC Octa Core Mixed Speed
954 Pts Faster OC octa-core speed.
+19%
799 Pts
Market Share
Based on 31,692,773 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.43 % Insanely higher market share.
+1,489%
0.09 %
Value
Value For Money
90.1 % Better value.
+18%
76.1 %
User Rating
UBM User Rating
175 % Much more popular.
+72%
102 %
Price
Price (score)
$320 Cheaper.
+20%
$398
Age
Newest
34 Months Much more recent.
+32%
50 Months
TDP
Thermal Design Power (TDP)
95 Watts Much more energy efficient.
+32%
140 Watts
Cores
CPU Processing Cores
6 cores 6 cores
Threads
CPU Processing Threads
12 threads 12 threads
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.7 GHz Slightly faster base frequency.
+9%
3.4 GHz
Turbo Clock
Turbo Clock Speed
4.7 GHz Faster turbo frequency.
+24%
3.8 GHz
64-Core
OC Multi Core Mixed Speed
1187 Pts Faster OC 64-core speed.
+21%
977 Pts
64-Core
Avg. Multi Core Mixed Speed
1023 Pts Faster 64-core speed.
+22%
841 Pts
Series
CPU Architecture
Coffee Lake Broadwell-E
Socket
Motherboard Socket
FCLGA1151 LGA2011-V3
Graphics
Integrated Graphics
UHD 630 None
Launch Date
Launch Date
Q4'17 Q2'16
Cache
Cache
12 MB 15 MB
Max Turbo Frequency
Max Turbo Frequency
4.70 GHz 3.8 GHz
Max Memory Size
Max Memory Size (dependent on memory type)
64 GB 128 GB
Memory Types
Memory Types
DDR4-2666 DDR4 2400/2133
Memory Channels
Max # of Memory Channels
2 4
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 None
vPro Tech
Intel® vPro™ Technology ‡
Yes No
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
Yes No
Max # of PCI Express Lanes
Max # of PCI Express Lanes
16 28

More specs » More specs »
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The i7-8700K is Intel’s latest, top of the range, 8th generation Coffee Lake processor. Like Kaby Lake and Sky Lake before that, Coffee Lake is based on Intel’s 14nm architecture which has been slightly optimized on each iteration. Following AMD’s modus operandi, Intel has upped the cores and threads across the range of their CPUs. In previous generations, a 6-core processor would have been a high-end desk-top (HEDT) processor, however the i7-8700K is the first Intel CPU with 6 cores and 12 threads to be classified (and priced) as a mainstream consumer processor. Specifically, the i7-8700K features a base clock speed of 3.7 GHz which boosts to 4.7 GHz (4.5 GHz for the previous generation i7-7700k), 12MB of smart (L3) cache and 2 channels of DDR4 RAM. The majority of the performance improvements over the 7th generation stem from the higher core count which results in a 50% increase in multi-core speed between the i7-7700k and i7-8700k. A new motherboard will need to be factored into the budget when upgrading to the 8700K as it requires a new Intel Z370 chipset which has supposedly been designed to better deliver power to CPUs with a greater number of cores. Also available in this latest release of CPUs is the 6 core 6 thread i5-8600k which is a more rational option (around $100 cheaper) for the vast majority of users that don’t require hyper-threading. Sandy bridge owners can finally justify an upgrade but with the next iteration of AMD's Zen architecture just around the corner the CPU market will be a lot faster moving now that Intel, once again, has to compete. [Sep '17 CPUPro]

MORE DETAILS

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

Processor Rankings (Price vs Performance) August 2020 CPU Rankings.

We calculate effective speed which measures real world performance for typical users. Effective speed is adjusted by current prices to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top CPUs. [CPUPro]

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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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