IntelBX80646I74790
IntelBX80662I56600K

4 Cores, 8 Threads @3.6GHz, Haswell.
Release date: Q2 2014.

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About

4 Cores, 4 Threads @3.5GHz, Skylake.
Release date: Q3 2015.

Real World Speed
Performance profile from 314,389 user samples
109,774 User Benchmarks
Best Bench: 76% Base clock 3.6 GHz, turbo 4 GHz (avg)
Worst Bench: 49% Base clock 3.6 GHz, turbo 0.4 GHz (avg)
Poor: 49% Great: 76%
SPEED RANK: 118th / 1182
Gaming
Gaming 65%
Destroyer
Desktop
Desktop 72%
Battleship
Workstation
Workstation 48%
Yacht
204,615 User Benchmarks
Best Bench: 86% Base clock 3.5 GHz, turbo 4.8 GHz (avg)
Worst Bench: 48% Base clock 3.5 GHz, turbo 0.75 GHz (avg)
Poor: 48% Great: 86%
SPEED RANK: 95th / 1182
Gaming
Gaming 69%
Battle cruiser
Desktop
Desktop 80%
Aircraft carrier
Workstation
Workstation 42%
Speed boat
Effective Speed
Effective CPU Speed
64.9 % 68.7 % Slightly faster effective speed.
+6%
1-Core
Avg. Single Core Mixed Speed
107 Pts 117 Pts Slightly faster single-core speed.
+9%
2-Core
Avg. Dual Core Mixed Speed
208 Pts 232 Pts Slightly faster dual-core speed.
+12%
4-Core
Avg. Quad Core Mixed Speed
365 Pts 426 Pts Faster quad-core speed.
+17%
8-Core
Avg. Octa Core Mixed Speed
542 Pts Faster octa-core speed.
+25%
435 Pts
64-Core
Avg. Multi Core Mixed Speed
551 Pts Faster 64-core speed.
+25%
440 Pts
1-Core
OC Single Core Mixed Speed
118 Pts 141 Pts Faster OC single-core speed.
+19%
2-Core
OC Dual Core Mixed Speed
234 Pts 280 Pts Faster OC dual-core speed.
+20%
4-Core
OC Quad Core Mixed Speed
439 Pts 537 Pts Faster OC quad-core speed.
+22%
8-Core
OC Octa Core Mixed Speed
595 Pts Slightly faster OC octa-core speed.
+10%
540 Pts
64-Core
OC Multi Core Mixed Speed
597 Pts Slightly faster OC 64-core speed.
+10%
542 Pts
Market Share
Based on 20,309,381 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.78 % 0.83 % Slightly higher market share.
+6%
Value
Value For Money
62.2 % 74.2 % Better value.
+19%
User Rating
UBM User Rating
66 % +2% 65 %
Price
Price (score)
$324 $210 Much cheaper.
+35%
Age
Newest
64 Months 49 Months More recent.
+23%
TDP
Thermal Design Power (TDP)
84 Watts Slightly more energy efficient.
+8%
91 Watts
Cores
CPU Processing Cores
4 cores 4 cores
Threads
CPU Processing Threads
8 threads Hugely higher thread count.
+100%
4 threads
Lithography
Manufacturing process
22 nm 14 nm Much newer manufacturing.
+36%
Base Clock
Base Clock Speed
3.6 GHz +3% 3.5 GHz
Turbo Clock
Turbo Clock Speed
4 GHz +3% 3.9 GHz
Series
CPU Architecture
Haswell Skylake
Socket
Motherboard Socket
FCLGA1150 FCLGA1151
Graphics
Integrated Graphics
HD 4600 HD 530
Launch Date
Launch Date
Q2'14 Q3'15
Cache
Cache
8 MB SmartCache 6 MB SmartCache
Lithography
Lithography
22 nm 14 nm
Recommended Price
Recommended Customer Price
$303.00 - $312.00 $242.00 - $243.00
Bus Speed
Bus Speed
5 GT/s DMI2 8 GT/s DMI3
Thermal Solution Specification
Thermal Solution Specification
PCG 2013D PCG 2015D (130W)
Max Memory Size
Max Memory Size (dependent on memory type)
32 GB 64 GB
Memory Types
Memory Types
DDR3-1333/1600, DDR3L-1333/1600 @ 1.5V DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V
Memory Bandwidth
Max Memory Bandwidth
25.6 GB/s 34.1 GB/s
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 4600 Intel® HD Graphics 530
Graphics Output
Graphics Output
eDP/DP/HDMI/DVI/VGA eDP/DP/HDMI/DVI
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.2 GHz 1.15 GHz
Graphics Video Max Memory
Graphics Video Max Memory
2 GB 64 GB
Graphics and IMC Lithography
Graphics and IMC Lithography
22 nm 14 nm
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
Yes No
TSX-NI
Intel® TSX-NI
No Yes
vPro Tech
Intel® vPro™ Technology ‡
Yes No
Stable Image Platform Program (SIPP)
Intel® Stable Image Platform Program (SIPP)
Yes No
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
Yes No
PCI Express Revision
PCI Express Revision
Up to 3.0 3.0

More specs » More specs »
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The Core i7-4790 is the third upgrade to Intel's flagship quad core hyper-threaded CPU. This version, like its predecessor the i7-4771, gets a 100 MHz bump in stock frequency and additionally the i7-4790 also gets a 100 MHz turbo frequency bump. These improvements (~4%) are marginal and practically impossible to discern in day to day use. Looking at a benchmark comparison between the 4771 and 4790 verifies that there is little difference between the two CPUs. Although the i7-4790 isn't much of a step forward, it's still one of the best (locked) mainstream processors on the market. AMD hasn't been able to compete with Intel on single threaded performance for several years, consequently Intel have no need to push the envelope. Overclockers should wait for the 4790K which is rumoured to be released shortly. [May '14 CPUPro]

MORE DETAILS

The Intel Core i5-6600K is based on the new "Skylake" 14nm manufacturing process. Sporting 4 physical cores with base/turbo clocks of 3.5/3.9 GHz the 6600K and its predecessor, the 4690K share the same basic configuration and disappointingly, offer similar performance. Comparing the 6600K and 6700K shows that the 6700K has faster multi and single core performance. The improved multi core performance is due to Hyperthreading which is the key differentiator for the i7-6700K. The gap in single core performance can largely be eliminated by overclocking the i5-6600K so although the stock effective speed is significantly higher on the 6700K, this gap diminishes significantly when both processors are overclocked. At a 30% discount, the 6600K is the better value gaming CPU. [Aug '15 CPUPro]

MORE DETAILS

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

We calculate effective speed which measures real world performance for typical gamers and desktop users. 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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  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
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