CPU Comparison

Core i7-7700K vs Intel Core i7-8700K

A side-by-side comparison of specs, performance and value. The Intel Core i7-7700K is a high-performance desktop processor launched in January 2017, representing the flagship of the Kaby Lake mainstream lineup. Built on the 14nm+ process, this quad-core CPU features Hyper-Threading, delivering 8 concurrent threads. It operates at an aggressive base clock of 4.2 GHz and boosts up to 4.5 GHz out of the box, providing exceptional single-threaded performance. The K suffix denotes an unlocked multiplier, making it a favorite among enthusiasts for overclocking, often pushing beyond 5.0 GHz with adequate cooling. With a 91W TDP, it demands robust cooling, especially since it uses thermal paste instead of solder between the die and IHS, a point of criticism among the community. It features 8MB of L3 cache and supports dual-channel DDR4-2400 memory. The integrated Intel HD Graphics 630 offers basic display capabilities, though its primary market is gamers relying on discrete GPUs. The i7-7700K marked the pinnacle of Intel's quad-core dominance before market pressures forced a core count increase.

Intel · 7th Generation Core i7
Core i7-7700K
4C / 8T4.5 GHz91 W
7.5
Full review
Top pick
Intel · Core i7
Intel Core i7-8700K
6C / 12T4.7 GHz95 W
9.5
Full review

The Bottom Line

Overview & Launch

Brand
Intel
Intel
Market
Desktop
Desktop
Segment
Performance Desktop
Desktop Enthusiast
Generation
7th Gen
Core i7 (Coffee Lake)
Launched
2017
2017
Status
Active
End-of-life
Codename
Kaby Lake
Coffee Lake
Series
7th Generation Core i7
Core i7
Family
Kaby Lake
8th Generation
Predecessor
Core i7-6700K
Intel Core i7-7700K
Successor
Core i7-8700K
Intel Core i7-9700K

Specifications Compared

Cores & Clocks
Cores
4
6
Threads
8
12
Base Clock
4.2 GHz
3.7 GHz
Boost Clock
4.5 GHz
4.7 GHz
Cache & Power
L3 Cache
8 MB
12 MB
TDP
91 W
95 W
Architecture
Architecture
Kaby Lake
Coffee Lake
Process Node
14nm
14nm
Memory
Memory Type
DDR4
DDR4
Memory Speed
2400 MT/s
2666 MT/s
Memory Channels
Dual (2)
Dual (2)
Max Memory
64 GB
128 GB
Platform & I/O
Socket
LGA 1151
Intel Socket 1151
PCIe Version
PCIe 3.0
Gen 3
PCIe Lanes
16
16
Integrated GPU
Yes
Yes
Unlocked
Yes
Yes

Performance Compared

Productivity

Core i7-7700K
Intel Core i7-8700K90

12 threads and high clocks make quick work of compiling and rendering.

Gaming

Core i7-7700K
Intel Core i7-8700K92

Still handles modern GPUs and high-refresh-rate gaming with ease.

Virtualization

Core i7-7700K
Intel Core i7-8700K88

Great for home labs and virtualization.

Efficiency

Core i7-7700K
Intel Core i7-8700K70

Consumes more power than newer generations when overclocked.

Specialized Performance

AI / ML

Core i7-7700K

No data

Intel Core i7-8700KLimited
  • No AI hardware
  • Strong CPU inference due to high clocks

Content Creation

Core i7-7700K

No data

Intel Core i7-8700KVery Good
Premiere ProBlenderUnreal EngineOBS Studio

Gaming

Core i7-7700K

No data

Intel Core i7-8700KExcellent
  • Won't bottleneck RTX 3080/4080 class GPUs
  • Excellent for 144Hz+ gaming
  • Overclocking increases frame rates further

Industry Impact

Gaming
High
Very High
Workstations
Low
High
Content Creation
Low
High
Virtualization
Low
High

Best CPU by Use Case

Competitive Gaming
Very Good
Overclocking
Excellent
Excellent
144Hz Gaming
Excellent
Live Streaming
Very Good
3D Rendering
Good
VR Gaming
Excellent

Target Audience

Gamers
Targeted
Targeted
Content Creators
Targeted
Developers
Targeted
Workstation Users
Targeted
Streamers
Targeted
Office / Productivity
Students

Strengths & Weaknesses

Core i7-7700K

Pros

  • Excellent single-core performance
  • Unlocked for overclocking
  • Easily hits 5.0 GHz with AIO cooling
  • Great for high-refresh-rate 1080p gaming

Cons

  • Only 4 cores
  • Uses thermal paste instead of solder (runs hot)
  • High power draw when overclocked
  • LGA 1151 is a dead platform
Intel Core i7-8700K

Pros

  • Unlocked for overclocking
  • Excellent single-core performance
  • 6 cores / 12 threads
  • Great for high-refresh gaming

Cons

  • Runs hot under load
  • Requires delidding for extreme OC
  • Older 14nm process
  • No PCIe 4.0

Competitors & Alternatives

Core i7-7700K

Intel Core i7-8700K

Our Verdict on Each

Core i7-7700KSituational

A legendary overclocker that delivered top-tier single-core performance in 2017, but its 4-core limit shows its age in modern multi-threaded workloads.

Best for: Upgrading an existing Z270 system cheaply

Read the full review

An iconic processor that brought 6 cores to the mainstream, offering incredible overclocking headroom and gaming performance that holds up today.

Best for: Legacy system upgrade for high-refresh gaming without spending on a new platform.

Read the full review

Frequently Asked Questions

Which is better, Core i7-7700K or Intel Core i7-8700K?

Based on our editorial ratings, the Intel Core i7-8700K comes out ahead with a score of 9.5/10. That said, the best choice depends on your workload — check the spec and performance breakdown above for gaming, productivity and efficiency differences.

Which is faster for gaming, Core i7-7700K or Intel Core i7-8700K?

For gaming, the Intel Core i7-8700K leads with a gaming performance score of 92/100 among Core i7-7700K and Intel Core i7-8700K.

Which uses less power?

The Core i7-7700K has the lowest rated TDP. Power draw across these chips: Core i7-7700K (91 W), Intel Core i7-8700K (95 W).

Do Core i7-7700K and Intel Core i7-8700K use the same socket?

No. They use different sockets (Core i7-7700K: LGA 1151, Intel Core i7-8700K: Intel Socket 1151), so each needs a compatible motherboard.

Which has more cores?

The Intel Core i7-8700K has the most cores. Core counts: Core i7-7700K (4 cores), Intel Core i7-8700K (6 cores).

Which is faster in multi-core benchmarks?

The Intel Core i7-8700K posts the highest multi-core benchmark score. Multi-core results: Core i7-7700K (0), Intel Core i7-8700K (16,000). Benchmark figures are approximate and workload-dependent.