IntelBX80684I78700K
IntelBX80671I76950X

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

10 Cores, 20 Threads @3.0GHz, Broadwell-E.
Release date: Q2 2016.

Real World Speed
Performance profile from 425,359 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
4,404 User Benchmarks
Best Bench: 99% Base clock 3 GHz, turbo 4.5 GHz (avg)
Worst Bench: 78% Base clock 3 GHz, turbo 1.25 GHz (avg)
Poor: 78% Great: 99%
SPEED RANK: 53rd / 1258
Gaming
Gaming 87%
Aircraft carrier
Desktop
Desktop 87%
Aircraft carrier
Workstation
Workstation 89%
Aircraft carrier
Effective Speed
Effective CPU Speed
93.6 % Slightly faster effective speed.
+7%
87.4 %
Memory
Avg. Memory Latency
92.9 Pts +2% 91.2 Pts
1-Core
Avg. Single Core Mixed Speed
135 Pts Faster single-core speed.
+22%
111 Pts
2-Core
Avg. Dual Core Mixed Speed
264 Pts Faster dual-core speed.
+19%
222 Pts
4-Core
Avg. Quad Core Mixed Speed
508 Pts Faster quad-core speed.
+13%
449 Pts
8-Core
Avg. Octa Core Mixed Speed
818 Pts 879 Pts Slightly faster octa-core speed.
+7%
Memory
OC Memory Latency
97.4 Pts +0% 97.1 Pts
1-Core
OC Single Core Mixed Speed
153 Pts Faster OC single-core speed.
+13%
135 Pts
2-Core
OC Dual Core Mixed Speed
303 Pts Faster OC dual-core speed.
+12%
270 Pts
4-Core
OC Quad Core Mixed Speed
601 Pts Faster OC quad-core speed.
+11%
540 Pts
8-Core
OC Octa Core Mixed Speed
954 Pts 1065 Pts Faster OC octa-core speed.
+12%
Market Share
Based on 31,655,367 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.42 % Insanely higher market share.
+14,100%
0.01 %
Value
Value For Money
90.1 % Much better value.
+45%
62.2 %
User Rating
UBM User Rating
175 % Hugely more popular.
+108%
84 %
Price
Price (score)
$320 Much cheaper.
+67%
$956
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 10 cores Much higher core count.
+67%
Threads
CPU Processing Threads
12 threads 20 threads Much higher thread count.
+67%
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.7 GHz Faster base frequency.
+23%
3 GHz
Turbo Clock
Turbo Clock Speed
4.7 GHz Faster turbo frequency.
+17%
4 GHz
64-Core
OC Multi Core Mixed Speed
1187 Pts 1726 Pts Much faster OC 64-core speed.
+45%
64-Core
Avg. Multi Core Mixed Speed
1023 Pts 1433 Pts Much faster 64-core speed.
+40%
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 25 MB
Max Turbo Frequency
Max Turbo Frequency
4.70 GHz 4 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 40

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 i7-6950X 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]

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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  • - RAM tests include: single/multi core bandwidth and latency.
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