Performance comparison: which is faster?
Core i7-5775C (Intel, 2015) and Core i7-3770K (Intel, 2012) are compared here. Compare not only scores, but also whether the motherboard can be reused and which GPU class is balanced with each CPU.
Overall performance: i7-5775C is about 5.6% faster
The sockets differ (LGA1150 / LGA1155), so switching requires a motherboard replacement. For games, performance balance with the GPU (guideline CPU:GPU = 0.9:1) matters more than CPU speed alone.
Relative performance score (higher is faster). Actual speed varies by workload, cooling, and memory configuration.
| Item | i7-5775C | i7-3770K |
|---|---|---|
| Performance Score | 9,500 | 9,000 |
| Generation | 5th Gen | 3rd Gen |
| Socket | LGA1150 | LGA1155 |
| Release Year | 2015 | 2012 |
| Type | Desktop | Desktop |
| Compatible GPU Example | Intel Arc A580 8GB | GeForce GTX 1660 |
| If You Want To... | Recommended |
|---|---|
| Prioritize maximum speed for heavy work or a high-end GPU | i7-5775C |
| Upgrade while reusing the current motherboard | Choose the CPU matching your motherboard socket |
| Prioritize value and adequate performance | i7-3770K (the lower model is often sufficient) |
i7-5775C is about 5.6% higher by score (i7-5775C: 9500 points / i7-3770K: 9000 points). For gaming, the GPU tier usually matters more than a few percent of CPU difference. For CPU-heavy work such as video editing and streaming, choose the faster CPU.
i7-5775C is 5th Gen, while i7-3770K is 3rd Gen.The sockets differ (LGA1150 / LGA1155), so switching requires a motherboard replacement.
Using our CPU:GPU = 0.9:1 guideline, Intel Arc A580 8GB pairs well with i7-5775C and GeForce GTX 1660 pairs well with i7-3770K. If either GPU is too strong or too weak, one part holds the other back.
