Intel Core i5 6600K CPU Review


On release day, we brought you a review of Intel’s mainstream Skylake flagship, the i7 6700K. Today, we will focus another Skylake, the far more affordable Core i5-6600K. The new processor architecture based on Intel’s newest generation 14nm process FinFET lithographic technology. It promises decreased power consumption and increased performance. Like its more expensive i7 sibling, the i5 6600K is also features an unlocked multiplier and is sure to be popular with enthusiasts.

One of the most notable new changes is the use of DDR4 memory. DDR4 memory was first introduced with Haswell-E just shy of a year ago. Prices were high and many people stayed away. Since then the prices have dropped and become much more affordable. Where Hawsell was limited to around 2666 MT/s, Skylake bumps that up to a staggering 4133 MT/s.

Skylake also brings Intel latest HD Graphics technology. The Core i5-6600K we are reviewing today features HD 530 graphics and Intel claims that it is dramatically faster than the HD 4000 graphics that came with Haswell.

For Skylake-K, Intel has added more extensive overclocking features, chipset support for NVMe drives. Of course there are the new IPC enhancements that offer up to 10% better performance over Haswell too.

Intel’s take on the Core i5 6600K

  • 3.5 GHz on all four cores
  • 3.9 GHz boost frequency
  • Full range Base Clock (BCLK) tuning granularity
  • DDR4 support for mainstream gaming systems
  • Fully unlocked for performance tuning
  • Intel Turbo Boost Technology 2.0
  • Intel HD Graphics 530 (1150 MHz)
  • 6 MB Intel Smart Cache
  • 16 PCI Express* 3.0 lanes

Intel Z170Chipset

  • Processor Overclocking with Intel Processor “K” SKUs
  • PCI Express 3.0 storage support with Intel Rapid Storage Technology
  • Support for processor PCIeExpress* 3.0 1×16, 2×8, or 1x8and 2×4

Unlock the Performance of the 6th gen Intel Core Processor Family

  • Up to 30% better performance than a 3-year old PC
  • Up to 20% better performance than a 2-year old PC
  • Up to 10% better performance than a 1-year old PC
  • First mainstream Intel desktop platform to support DDR4 memory

Improved Overclocking Capabilities

  • Fully unlocked Turbo that has software/BIOS controlled ratio
  • Base Clock (BCLK) ratio-base with full range 1 MHz increments
  • DDR ratio override capacities for DDR4 up to 4133 MT/s for an increase in memory frequency
  • DDR granularly steps of 100/133MHz for finer grain increments

Enhanced Intel Z170Chipset Flexibility for Gaming4

  • 40% more high speed I/O lanes (USB 3.0 and PCIe3.0)over Intel 9 Series chipset
  • New PCI Express* 3.0 storage support with Intel Rapid Storage Technology

Future Proof

  • Reduced latency
  • Performance scales with cores
  • Get ready for high-resolution gaming


  • Full performance from NVMe drives off the chipset
  • Intel Rapid Storage Technology for PCI Express Storage
  • New form factors (U.2)


  • Ecosystem support collaborating with game developers
  • 800 GB SKU

Up next, the specifications and a closer look.

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