Performance comparison: which is faster?
AMD Phenom II X6 1055T (AMD, 2010) and AMD A10-7850K (AMD, 2014) 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: Phenom II X6 1055T is about 11.5% faster
The sockets differ (AM3 / FM2+), 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 | Phenom II X6 1055T | A10-7850K |
|---|---|---|
| Performance Score | 5,800 | 5,200 |
| Generation | Phenom II | A-Series |
| Socket | AM3 | FM2+ |
| Release Year | 2010 | 2014 |
| Type | Desktop | Desktop |
| Compatible GPU Example | Radeon RX 570 | Radeon RX 6500 XT |
| If You Want To... | Recommended |
|---|---|
| Prioritize maximum speed for heavy work or a high-end GPU | Phenom II X6 1055T |
| Upgrade while reusing the current motherboard | Choose the CPU matching your motherboard socket |
| Prioritize value and adequate performance | A10-7850K (the lower model is often sufficient) |
Phenom II X6 1055T is about 11.5% higher by score (Phenom II X6 1055T: 5800 points / A10-7850K: 5200 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.
Phenom II X6 1055T is Phenom II, while A10-7850K is A-Series.The sockets differ (AM3 / FM2+), so switching requires a motherboard replacement.
Using our CPU:GPU = 0.9:1 guideline, Radeon RX 570 pairs well with Phenom II X6 1055T and Radeon RX 6500 XT pairs well with A10-7850K. If either GPU is too strong or too weak, one part holds the other back.
