IntelBX80677I77700K
IntelBX80671I76900K

4 Cores, 8 Threads @4.2GHz, Kaby Lake.
Release date: Q1 2017.

8 Cores, 16 Threads @3.2GHz, Broadwell-E.
Release date: Q2 2016.

Real World Speed
Performance profile from 231,683 user samples
228,645 User Benchmarks
Best Bench: 110% Base clock 4.2 GHz, turbo 5.1 GHz (avg)
Worst Bench: 79% Base clock 4.2 GHz, turbo 1.8 GHz (avg)
Poor: 79% Great: 110%
SPEED RANK: 32nd / 1144
Gaming
Gaming 96%
Nuclear submarine
Desktop
Desktop 97%
Nuclear submarine
Workstation
Workstation 71%
Battleship
3,038 User Benchmarks
Best Bench: 111% Base clock 4 GHz, turbo 4.5 GHz (avg)
Worst Bench: 81% Base clock 3.2 GHz, turbo 3.2 GHz (avg)
Poor: 81% Great: 111%
SPEED RANK: 31st / 1144
Gaming
Gaming 96%
Nuclear submarine
Desktop
Desktop 92%
Nuclear submarine
Workstation
Workstation 97%
Nuclear submarine
Effective Speed
Effective CPU Speed
95.6 % 95.7 % +0%
SC Mixed
Avg. Single Core Mixed Speed
136 Pts Faster single-core speed.
+19%
114 Pts
QC Mixed
Avg. Quad Core Mixed Speed
465 Pts +2% 455 Pts
MC Mixed
Avg. Multi Core Mixed Speed
719 Pts 1177 Pts Much faster multi-core speed.
+64%
SC Mixed
OC Single Core Mixed Speed
152 Pts Faster OC single-core speed.
+15%
132 Pts
QC Mixed
OC Quad Core Mixed Speed
553 Pts +5% 529 Pts
MC Mixed
OC Multi Core Mixed Speed
809 Pts 1358 Pts Much faster OC multi-core speed.
+68%
Market Share
Based on 13,906,796 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.85 % Insanely higher market share.
+6,067%
0.03 %
Value
Value For Money
85.8 % Much better value.
+43%
59.9 %
User Rating
UBM User Rating
127 % Hugely more popular.
+123%
57 %
Price
Price (score)
$388 Much cheaper.
+62%
$1,019
Age
Newest
24 Months More recent.
+23%
31 Months
TDP
Thermal Design Power (TDP)
91 Watts Much more energy efficient.
+35%
140 Watts
Cores
CPU Processing Cores
4 cores 8 cores Hugely higher core count.
+100%
Threads
CPU Processing Threads
8 threads 16 threads Hugely higher thread count.
+100%
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
4.2 GHz Much faster base frequency.
+31%
3.2 GHz
Turbo Clock
Turbo Clock Speed
4.5 GHz Slightly faster turbo frequency.
+12%
4 GHz
SC Int
Single Core Integer Speed
149 Pts Faster single-core int speed.
+16%
128 Pts
SC Float
Single Core Floating Point Speed
158 Pts Slightly faster single-core fp speed.
+14%
139 Pts
QC Int
Quad Core Integer Speed
539 Pts Slightly faster quad-core int speed.
+7%
505 Pts
QC Float
Quad Core Floating Point Speed
577 Pts +4% 556 Pts
MC Int
Multi Core Integer Speed
738 Pts 1250 Pts Much faster multi-core int speed.
+69%
MC Float
Multi Core Floating Point Speed
866 Pts 1457 Pts Much faster multi-core fp speed.
+68%
Series
CPU Architecture
Kaby Lake Broadwell-E
Socket
Motherboard Socket
FCLGA1151 LGA2011-V3
Graphics
Integrated Graphics
HD 630 None
Launch Date
Launch Date
Q1'17 Q2'16
Cache
Cache
8 MB 20 MB
Recommended Price
Recommended Customer Price
$339.00 - $350.00 N/A
Max Memory Size
Max Memory Size (dependent on memory type)
64 GB 128 GB
Memory Types
Memory Types
DDR4-2133/2400, DDR3L-1333/1600 @ 1.35V DDR4 2400/2133
Memory Channels
Max # of Memory Channels
2 4
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 630 None
Max # of PCI Express Lanes
Max # of PCI Express Lanes
16 40

More specs » More specs »
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The Core i7-7700K is Intel’s flagship Kaby Lake based CPU which is reported to have the same IPC as its predecessor, Skylake. Comparing the 7700K and 6700K shows that both average effective speed and peak overclocked speed are up by 7%. Most of the increase in average effective speed is explained by the 5% boost in base clocks from 4.0 to 4.2 GHz. The improved peak lab speed is attributable to a combination of better overclocking capacity and improvements in Intel’s speedshift technology which make the 7700K slightly more responsive. Kaby Lake also has marginally better HD 630 integrated graphics. The i7-7700K is priced similarly to the i7-6700K so for top end gaming and workstation builds, the 7700K is the clear choice for 2017. AMD’s Ryzen will release later this year so things could change at that time. [Jan '17 CPUPro]

MORE DETAILS

The Core i7-6900K is one of four new Broadwell-E prosumer CPUs. This model has eight cores with base and turbo frequencies of 3.2 and 4.0 GHz respectively. The 6900K is based on a 14 nm architecture, it has a TDP of 140 watts, 40 PCIe 3.0 lanes and no integrated graphics. Because of its MSRP of $1,100, the 6900K only makes sense for very niche use cases which include top end graphics design and video production. Comparing the 6900K and 6700K shows that for typical desktop use the 6900K only offers a gain of around 12% for a whopping three 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 6900K. That said, as a workstation CPU the 6900K is bested only by the $2,000 flagship ten core 6950X. (6900K vs 6950X[Jun '16 CPUPro]

MORE DETAILS

Processor Rankings (Price vs Performance) January 2019 CPU Rankings.

We calculate effective speed which measures real world performance for typical consumers. Effective speed is adjusted by current prices to yield a value for money rating which is geared towards gamers. 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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Intel Core i5-8600K $260Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $163
HDDRAMUSB
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Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $800SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $133SanDisk Ultra Fit 32GB $12
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