IntelBX80673I97900X
IntelBX80684I78700K

10 Cores, 20 Threads @3.8GHz, Skylake-X.
Release date: Q2 2017.

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

Real World Speed
Performance profile from 297,585 user samples
7,611 User Benchmarks
Best Bench: 124% Base clock 3.3 GHz, turbo 4.9 GHz (avg)
Worst Bench: 99% Base clock 3.3 GHz, turbo 4.2 GHz (avg)
Poor: 99% Great: 124%
SPEED RANK: 18th / 1158
Gaming
Gaming 110%
UFO
Desktop
Desktop 107%
UFO
Workstation
Workstation 130%
UFO
289,974 User Benchmarks
Best Bench: 124% Base clock 3.7 GHz, turbo 5.05 GHz (avg)
Worst Bench: 93% Base clock 3.7 GHz, turbo 1.05 GHz (avg)
Poor: 93% Great: 124%
SPEED RANK: 23rd / 1158
Gaming
Gaming 107%
UFO
Desktop
Desktop 104%
UFO
Workstation
Workstation 94%
Nuclear submarine
Effective Speed
Effective CPU Speed
110 % +3% 107 %
SC Mixed
Avg. Single Core Mixed Speed
128 Pts 137 Pts Slightly faster single-core speed.
+7%
QC Mixed
Avg. Quad Core Mixed Speed
498 Pts 522 Pts +5%
MC Mixed
Avg. Multi Core Mixed Speed
1666 Pts Much faster multi-core speed.
+57%
1062 Pts
SC Mixed
OC Single Core Mixed Speed
143 Pts 155 Pts Slightly faster OC single-core speed.
+8%
QC Mixed
OC Quad Core Mixed Speed
566 Pts 610 Pts Slightly faster OC quad-core speed.
+8%
MC Mixed
OC Multi Core Mixed Speed
1887 Pts Much faster OC multi-core speed.
+54%
1225 Pts
Market Share
Based on 17,051,104 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.06 % 2.43 % Insanely higher market share.
+3,950%
Value
Value For Money
72.3 % 101 % Much better value.
+39%
User Rating
UBM User Rating
62 % 166 % Hugely more popular.
+168%
Price
Price (score)
$904 $345 Much cheaper.
+62%
Age
Newest
22 Months 19 Months Slightly more recent.
+14%
TDP
Thermal Design Power (TDP)
140 Watts 95 Watts Much more energy efficient.
+32%
Cores
CPU Processing Cores
10 cores Much higher core count.
+67%
6 cores
Threads
CPU Processing Threads
20 threads Much higher thread count.
+67%
12 threads
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.8 GHz +3% 3.7 GHz
Turbo Clock
Turbo Clock Speed
4.3 GHz 4.7 GHz Slightly faster turbo frequency.
+9%
SC Int
Single Core Integer Speed
138 Pts 150 Pts Slightly faster single-core int speed.
+9%
SC Float
Single Core Floating Point Speed
147 Pts 159 Pts Slightly faster single-core fp speed.
+8%
QC Int
Quad Core Integer Speed
551 Pts 591 Pts Slightly faster quad-core int speed.
+7%
QC Float
Quad Core Floating Point Speed
584 Pts 631 Pts Slightly faster quad-core fp speed.
+8%
MC Int
Multi Core Integer Speed
1714 Pts Much faster multi-core int speed.
+54%
1115 Pts
MC Float
Multi Core Floating Point Speed
1992 Pts Much faster multi-core fp speed.
+51%
1315 Pts
Series
CPU Architecture
Skylake-X Coffee Lake
Socket
Motherboard Socket
LGA2066 FCLGA1151
Graphics
Integrated Graphics
None UHD 630
Launch Date
Launch Date
Q2'17 Q4'17
Cache
Cache
13.75 MB L3 12 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2, AVX-512 SSE4.1/4.2, AVX2
Recommended Price
Recommended Customer Price
$989.00 - $999.00 N/A
Thermal Solution Specification
Thermal Solution Specification
PCG 2017X PCG 2015C (130W)
Max Memory Size
Max Memory Size (dependent on memory type)
128 GB 64 GB
Memory Channels
Max # of Memory Channels
4 2
Max # of PCI Express Lanes
Max # of PCI Express Lanes
44 16

More specs » More specs »
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Intel’s core i9-7900X, from the Skylake-X series, is Intel’s latest 10-core, 20-thread flagship processor. It's the first to bear the i9 moniker and utilize the new X299 (Basin Falls) chipset/motherboard. The 7900X is the fastest CPU on the market today, however, imminent competition from AMD’s 16-core, 32-thread Ryzen Threadripper CPUs and the forthcoming release of more Intel Core X series mean that its reign will be a short one. The i9-7900X supersedes the 10-core Broadwell-E core i7-6950X that held the crown for little over a year. Both are extremely powerful and pricey high end desktop processors (HEDTs) which excel in multi-threaded tasks such as media encoding. However, despite the same power draw (TDP 140W), the newer i9-7900X betters the i7-6950X in terms of peak overclocked performance by 10% mostly thanks to increased clock speeds from 3.0GHz/4.0GHz to 3.3GHz/4.3GHz for base/turbo. It also betters the i7-6950X on price by around 28%. This all translates to the i9-7900X offering around 20% more value for money, even despite its eye-watering $999 price tag. The more accessible pricing (albeit not accessible for the majority) and hurried release of the i9-7900k to market is widely perceived as a reaction to AMD’s Ryzen Threadripper CPUs, rumoured for release towards the end of July 2017. So if you want to own the fastest consumer CPU in the world, it would be wise to wait for the dust to settle. [Jul '17 CPUPro]

MORE DETAILS

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

Processor Rankings (Price vs Performance) May 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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CPUGPUSSD
Intel Core i7-8700K $345Nvidia GTX 1070 $380Samsung 850 Evo 250GB $92
AMD Ryzen 5 2600 $145Nvidia GTX 1060-6GB $208Samsung 850 Evo 500GB $99
AMD Ryzen 5 1600 $112Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $160
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $80SanDisk Extreme 64GB $128
WD Blue 1TB (2012) $43G.SKILL Trident Z DDR4 3200 C14 4x16GB $651SanDisk Extreme 32GB $48
Seagate Barracuda 3TB (2016) $73Corsair Vengeance LPX DDR4 3200 C16 2x8GB $85SanDisk Ultra Fit 32GB $12
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