AMD Athlon II X4 638 vs AMD Athlon II X4 640
Physical Specifications
| Socket | AMD Socket FM1 | AMD Socket AM3 |
|---|---|---|
| Process size | 32 nm | 45 nm |
| Transistors | 1,178 million | 300 million |
| Die size | 228 mm² | 169 mm² |
| Package | µPGA | µPGA |
Performance
| Frequency | 2.7 GHz | 3 GHz |
|---|---|---|
| Turbo clock | — | — |
| Base clock | 100 MHz | 200 MHz |
| Multiplier | 27.0x | 15.0x |
| Multiplier unlocked | No | No |
| Voltage | 1.4125 V | 1.4 V |
| TDP | 65 W | 95 W |
Architecture Details
| Vertical Segment | Desktop | Desktop |
|---|---|---|
| Production status | unknown | End-of-life |
| Release date | Feb 6th, 2012 | May 11th, 2010 |
| Codename | Llano | Propus |
| Generation | Athlon II X4 | Athlon II X4 |
| Part | AD638XOJZ43GXAD638XOJGXBOX | ADX640WFK42GMADX640WFGMBOX |
| Memory support | DDR3 Dual-channel | DDR3 Dual-channel |
| ECC memory | No | No |
| PCI Express | — | 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 | 1MB (per core) | 512K (per core) |
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 |
