IntelBX80684I78700K
IntelBX80673I77800X

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

6 Cores, 12 Threads @3.50 GHz, Skylake.
Release date ≈ Q2 2017.

Real World Speed
Performance profile from 651,537 user samples
633,193 User Benchmarks
Best Bench: 103% Base clock 3.7 GHz, turbo 5.3 GHz (avg)
Worst Bench: 77% Base clock 3.7 GHz, turbo 1.15 GHz (avg)
Poor: 77% Great: 103%
SPEED RANK: 50th / 1316
Gaming
Gaming 92%
Nuclear submarine
Desktop
Desktop 93%
Nuclear submarine
Workstation
Workstation 82%
Aircraft carrier
18,344 User Benchmarks
Best Bench: 90% Base clock 3.5 GHz, turbo 4.55 GHz (avg)
Worst Bench: 68% Base clock 3.5 GHz, turbo 0.7 GHz (avg)
Poor: 68% Great: 90%
SPEED RANK: 156th / 1316
Gaming
Gaming 80%
Battleship
Desktop
Desktop 81%
Aircraft carrier
Workstation
Workstation 74%
Battleship
Effective Speed
Effective CPU Speed
91.8 % Faster effective speed.
+15%
80 %
Memory
Avg. Memory Latency
91.9 Pts Lower memory latency.
+23%
74.9 Pts
1-Core
Avg. Single Core Mixed Speed
133 Pts Faster single-core speed.
+11%
120 Pts
2-Core
Avg. Dual Core Mixed Speed
259 Pts Slightly faster dual-core speed.
+10%
236 Pts
4-Core
Avg. Quad Core Mixed Speed
493 Pts Slightly faster quad-core speed.
+8%
456 Pts
8-Core
Avg. Octa Core Mixed Speed
794 Pts Slightly faster octa-core speed.
+7%
745 Pts
Memory
OC Memory Latency
97.1 Pts Lower OC memory latency.
+17%
83.3 Pts
1-Core
OC Single Core Mixed Speed
152 Pts Slightly faster OC single-core speed.
+9%
140 Pts
2-Core
OC Dual Core Mixed Speed
301 Pts Slightly faster OC dual-core speed.
+9%
275 Pts
4-Core
OC Quad Core Mixed Speed
593 Pts Slightly faster OC quad-core speed.
+9%
544 Pts
8-Core
OC Octa Core Mixed Speed
948 Pts Slightly faster OC octa-core speed.
+8%
874 Pts
Market Share
Based on 44,036,120 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.22 % Insanely higher market share.
+2,950%
0.04 %
Value
Value For Money
89.8 % Better value.
+13%
79.2 %
User Rating
UBM User Rating
81 % Much more popular.
+53%
53 %
Price
Price (score)
$300 $288 +4%
Age
Newest
44 Months Slightly more recent.
+6%
47+ Months
64-Core
OC Multi Core Mixed Speed
1173 Pts Slightly faster OC 64-core speed.
+10%
1071 Pts
64-Core
Avg. Multi Core Mixed Speed
989 Pts Slightly faster 64-core speed.
+6%
935 Pts
Launch Date
Launch Date
Q4'17 Q2'17
Cache
Cache
12 MB 8.25 MB L3
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX 2.0, AVX-512
Recommended Price
Recommended Customer Price
N/A $383.00 - $389.00
Max Turbo Frequency
Max Turbo Frequency
4.70 GHz 4.00 GHz
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (130W) PCG 2017X
Max Memory Size
Max Memory Size (dependent on memory type)
64 GB 128 GB
Memory Types
Memory Types
DDR4-2666 DDR4-2400
Memory Channels
Max # of Memory Channels
2 4
Max # of PCI Express Lanes
Max # of PCI Express Lanes
16 28

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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]

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Completely outclassed by the 8700k which is cheaper and faster. RIP Skylake-X [May '18 koopahermit]

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Processor Rankings (Price vs Performance) June 2021 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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Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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