CPU Comparison

Intel Core i7-5775C vs Intel Core i7-6700

A side-by-side comparison of specs, performance and value. The Intel Core i7-5775C is a rare and highly sought-after socketed desktop processor based on the 14nm Broadwell architecture. Unlike its BGA counterpart, the 5775R, this chip utilizes the LGA 1150 socket, offering a unique upgrade path for users on older Z97 motherboards. It features four cores and eight threads, operating at a base clock of 3.3 GHz with a turbo boost of 3.7 GHz. The defining feature is the inclusion of Intel Iris Pro Graphics 6200 with 128 MB of embedded L4 cache (eDRAM). This eDRAM not only supercharges the integrated graphics but also acts as a low-latency memory buffer for the CPU cores, giving it an edge in certain CPU-bound gaming scenarios when paired with a discrete GPU. With a 65-watt TDP and an unlocked multiplier, it is a versatile chip. It represents a unique moment in Intel's history where high-end integrated graphics and eDRAM were brought to the standard DIY desktop market.

Top pick
Intel · Core i7
Intel Core i7-5775C
4C / 8T3.7 GHz65 W
8.5
Full review
Intel · Core i7
Intel Core i7-6700
4C / 8T4 GHz65 W
8
Full review

The Bottom Line

Overview & Launch

Brand
Intel
Intel
Market
Desktop
Desktop
Segment
Desktop
Desktop
Generation
Core i7 (Broadwell)
Core i7 (Skylake)
Launched
2015
2015
Status
Active
End-of-life
Codename
Broadwell
Skylake
Series
Core i7
Core i7
Family
5th Generation
6th Generation
Predecessor
Intel Core i7-4790
Intel Core i7-4790
Successor
Intel Core i7-6700
Intel Core i7-7700

Specifications Compared

Cores & Clocks
Cores
4
4
Threads
8
8
Base Clock
3.3 GHz
3.4 GHz
Boost Clock
3.7 GHz
4 GHz
Cache & Power
L3 Cache
6 MB
8 MB
TDP
65 W
65 W
Architecture
Architecture
Broadwell
Skylake
Process Node
14nm
14nm
Memory
Memory Type
DDR3
DDR3, DDR4
Memory Speed
1600 MT/s
2133 MT/s
Memory Channels
Dual (2)
Dual (2)
Max Memory
32 GB
64 GB
Platform & I/O
Socket
Intel Socket 1150
Intel Socket 1151
PCIe Version
Gen 3
Gen 3
PCIe Lanes
16
16
Integrated GPU
Yes
Yes
Unlocked
Yes
No

Performance Compared

Productivity

Intel Core i7-5775C70

4 cores handle office tasks effortlessly, but lack modern IPC.

Intel Core i7-6700Best75

Handles office workloads and multitasking without issues.

Gaming

Intel Core i7-5775CBest75

The eDRAM provides incredibly smooth frame times in older games.

Intel Core i7-670065

Good for 60fps gaming with a discrete GPU, but struggles with modern high-refresh titles.

Virtualization

Intel Core i7-5775C55

Capable of light VMs, but limited by 65W TDP.

Intel Core i7-6700Best60

Capable of running 1-2 light VMs.

Efficiency

Intel Core i7-5775CBest95

14nm process makes it incredibly power-efficient.

Intel Core i7-670090

Highly efficient 65W design.

Specialized Performance

AI / ML

Intel Core i7-5775CLimited
  • No AI hardware
  • eDRAM helps slightly with CPU inference
Intel Core i7-6700Limited
  • No AI hardware
  • CPU inference is slow

Content Creation

Intel Core i7-5775CFair
Basic Photo Editing1080p Video EditingAudio Production
Intel Core i7-6700Fair
Basic Photo Editing1080p Video EditingAudio Production

Gaming

Intel Core i7-5775CVery Good
  • eDRAM reduces stutter in CPU-bound games
  • Iris Pro 6200 good for older games
  • Can be paired with a discrete GPU for better performance
Intel Core i7-6700Good
  • Needs a discrete GPU for modern gaming
  • Quad-core design is aging for new AAA games
  • Great for older or esports titles

Industry Impact

Gaming
Moderate
High
Workstations
Low
Moderate
Content Creation
Low
Moderate
Virtualization
Low
Moderate

Best CPU by Use Case

1080p Gaming (with GPU)
Very Good
Very Good
Light Gaming (iGPU)
Good
Office Productivity
Excellent
Excellent
Programming
Very Good
Very Good
Heavy Rendering
Poor
Poor
4K Media Playback
Excellent

Target Audience

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

Strengths & Weaknesses

Intel Core i7-5775C

Pros

  • 128 MB L4 eDRAM
  • Iris Pro 6200 graphics
  • Drop-in upgrade for LGA 1150
  • Unlocked multiplier

Cons

  • Only 4 cores
  • Supports DDR3 only
  • Expensive on the secondary market
  • Older 14nm process
Intel Core i7-6700

Pros

  • Excellent power efficiency (65W)
  • Solid single-core performance
  • Supports DDR4 memory
  • Good integrated graphics

Cons

  • Only 4 cores
  • Locked multiplier
  • No PCIe 4.0
  • Outdated platform

Competitors & Alternatives

Intel Core i7-5775C

Intel Core i7-6700

Our Verdict on Each

A fantastic drop-in upgrade for LGA 1150 systems. The eDRAM gives it surprising legs in older games, though its CPU performance is outclassed by modern hardware.

Best for: Upgrading an older LGA 1150 system for smooth retro gaming.

Read the full review

A reliable and efficient quad-core CPU that was the gold standard for mainstream desktop computing in 2015, still capable of basic tasks today.

Best for: Upgrading an older LGA 1151 system for budget 1080p gaming.

Read the full review

Frequently Asked Questions

Which is better, Intel Core i7-5775C or Intel Core i7-6700?

Based on our editorial ratings, the Intel Core i7-5775C comes out ahead with a score of 8.5/10. 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, Intel Core i7-5775C or Intel Core i7-6700?

For gaming, the Intel Core i7-5775C leads with a gaming performance score of 75/100 among Intel Core i7-5775C and Intel Core i7-6700.

Do Intel Core i7-5775C and Intel Core i7-6700 use the same socket?

No. They use different sockets (Intel Core i7-5775C: Intel Socket 1150, Intel Core i7-6700: Intel Socket 1151), so each needs a compatible motherboard.

Which is faster in multi-core benchmarks?

The Intel Core i7-6700 posts the highest multi-core benchmark score. Multi-core results: Intel Core i7-5775C (7,000), Intel Core i7-6700 (7,500). Benchmark figures are approximate and workload-dependent.