Performance comparison: which is faster?
Core i3-8100 (Intel, 2018) and Core i5-3570K (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: i3-8100 is about 5.9% faster
The sockets differ (LGA1151 / 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 | i3-8100 | i5-3570K |
|---|---|---|
| Performance Score | 7,200 | 6,800 |
| Generation | 8th Gen | 3rd Gen |
| Socket | LGA1151 | LGA1155 |
| Release Year | 2018 | 2012 |
| Type | Desktop | Desktop |
| Compatible GPU Example | Radeon RX 590 | Radeon RX 580 |
| If You Want To... | Recommended |
|---|---|
| Prioritize maximum speed for heavy work or a high-end GPU | i3-8100 |
| Upgrade while reusing the current motherboard | Choose the CPU matching your motherboard socket |
| Prioritize value and adequate performance | i5-3570K (the lower model is often sufficient) |
i3-8100 is about 5.9% higher by score (i3-8100: 7200 points / i5-3570K: 6800 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.
i3-8100 is 8th Gen, while i5-3570K is 3rd Gen.The sockets differ (LGA1151 / LGA1155), so switching requires a motherboard replacement.
Using our CPU:GPU = 0.9:1 guideline, Radeon RX 590 pairs well with i3-8100 and Radeon RX 580 pairs well with i5-3570K. If either GPU is too strong or too weak, one part holds the other back.
