AMD Athlon II X4 645 vs AMD Phenom II X4 840T
Physical Specifications
| Socket | AMD Socket AM3 | AMD Socket AM3 |
|---|---|---|
| Process size | 45 nm | 45 nm |
| Transistors | 300 million | 904 million |
| Die size | 169 mm² | 346 mm² |
| Package | µPGA | µPGA |
Performance
| Frequency | 3.1 GHz | 2.9 GHz |
|---|---|---|
| Turbo clock | — | up to 3.2 GHz |
| Base clock | 200 MHz | 200 MHz |
| Multiplier | 15.5x | 14.5x |
| Multiplier unlocked | No | No |
| Voltage | 1.4 V | 1.4 V |
| TDP | 95 W | 95 W |
Architecture Details
| Vertical Segment | Desktop | Desktop |
|---|---|---|
| Production status | End-of-life | End-of-life |
| Release date | Sep 21st, 2010 | Sep 1st, 2010 |
| Codename | Propus | Zosma |
| Generation | Athlon II X4 | Phenom II X4 |
| Part | ADX645WFK42GMADX645WFGMBOX | HD840TWFK4DGR |
| Memory support | DDR3 Dual-channel | DDR3 Dual-channel |
| ECC memory | No | No |
| PCI Express | Gen 2 | Gen 2 |
Cores
| Total Cores | 4 | 4 |
|---|---|---|
| Total Threads | 4 | 4 |
| SMP # CPUs | 1 | 1 |
| Integrated graphics | — | — |
Cache
| Cache L1 | 128K (per core) | 128K (per core) |
|---|---|---|
| Cache L2 | 512K (per core) | 512K (per core) |
| Cache L3 | — | 6MB (shared) |
Features & Technologies
| 3DNow! | Yes | Yes |
|---|---|---|
| AMD-V | Yes | Yes |
| AMD64 | Yes | Yes |
| MMX | Yes | Yes |
| NX bit | Yes | Yes |
| SSE | Yes | Yes |
| SSE2 | Yes | Yes |
| SSE3 | Yes | Yes |
| SSE4A | Yes | Yes |
| Turbo Core | — | Yes |
Notes
| Notes | — | OEM only. |
|---|
