| Name: | AMD Phenom II X2 521 | 
| Family: | AMD Phenom II | 
| Group: | AMD Phenom II - 500 | 
| Segment: | Desktop / Server | 
| Generation: | 1 | 
 
                    | Name: | AMD Phenom II X2 521 | 
| Family: | AMD Phenom II | 
| Group: | AMD Phenom II - 500 | 
| Segment: | Desktop / Server | 
| Generation: | 1 | 
| CPU Cores: | 2 | 
| Threads: | 2 | 
| Cores: | 2x | 
| Core architecture: | normal | 
| Hyperthreading: | No | 
| Overclocking: | Yes | 
| Frequency: | 3.5 GHz | 
| Memory type: | DDR3-1333, DDR2-1066 | 
| Max. Memory: | 0 bytes | 
| Memory channels: | 2 | 
| Bandwidth: | -- | 
| ECC: | No | 
| PCIe: | pci | 
| AES-NI: | No | 
| TDP (PL1 / PBP): | 65 W | 
| TDP (PL2): | None | 
| TDP up: | None | 
| TDP down: | None | 
| Tjunction max: | -- | 
| Technology: | 45 nm | 
| Chip design: | -- | 
| Socket: | AM3 | 
| L2-Cache: | 0 bytes | 
| L3-Cache: | 2.0 MB | 
| Architecture: | Regor (K10) | 
| Operating systems: | Windows 10, Linux | 
| Virtualization: | AMD-V | 
| Instruction set (ISA): | x86-64 (64 bit) | 
| ISA extensions: | SSE3, SSE4a | 
| Release date: | Q2/2011 | 
| Release price: | 35 $ | 
| Part Number: | -- | 
| Documents: | Technical data sheet | 
 Geekbench 3, 64bit (Multi-Core)
    Geekbench 3, 64bit (Multi-Core)
|   | Intel Core M-5Y10 
                    2C 4T @ 0.8 GHz
                 | 3515 | 
|   | AMD A8-5557M 
                    4C 4T @ 2.1 GHz
                 | 3498 | 
|   | AMD Phenom II X2 521 
                    2C 2T @ 3.5 GHz
                 | 3480 | 
|   | AMD A8-3510MX 
                    4C 4T @ 1.8 GHz
                 | 3450 | 
|   | Intel Pentium 4405Y 
                    2C 4T @ 1.5 GHz
                 | 3446 | 
 Estimated results for PassMark CPU Mark
    Estimated results for PassMark CPU Mark
|   | Intel Celeron G5900E 
                    2C 2T @ 3.2 GHz
                 | 2260 | 
|   | Intel Celeron J3455E 
                    4C 4T @ 1.5 GHz
                 | 2255 | 
|   | AMD Phenom II X2 521 
                    2C 2T @ 3.5 GHz
                 | 2253 | 
|   | Intel Core i3-3225 
                    2C 4T @ 3.3 GHz
                 | 2246 | 
|   | Intel Celeron N6211 
                    2C 2T @ 1.2 GHz
                 | 2245 | 
 Geekbench 3, 64bit (Single-Core)
    Geekbench 3, 64bit (Single-Core)
|   | AMD A10-7700K 
                    4C 4T @ 3.5 GHz
                 | 1910 | 
|   | AMD A4-6320 
                    2C 2T @ 3.8 GHz
                 | 1906 | 
|   | AMD Phenom II X2 521 
                    2C 2T @ 3.5 GHz
                 | 1888 | 
|   | AMD Phenom II X4 975 
                    4C 4T @ 3.6 GHz
                 | 1876 | 
|   | AMD A8-5500B 
                    4C 4T @ 3.2 GHz
                 | 1872 | 
 Cinebench R15 (Multi-Core)
    Cinebench R15 (Multi-Core)
|   | Intel Core i3-4100U 
                    2C 4T @ 1.8 GHz
                 | 184 | 
|   | AMD Phenom II X3 700e 
                    3C 3T @ 2.4 GHz
                 | 182 | 
|   | AMD Phenom II X2 521 
                    2C 2T @ 3.5 GHz
                 | 177 | 
|   | Intel Core i3-3227U 
                    2C 4T @ 1.9 GHz
                 | 175 | 
|   | Intel Celeron G1610 
                    2C 2T @ 2.6 GHz
                 | 174 | 
 Cinebench R15 (Single-Core)
    Cinebench R15 (Single-Core)
|   | AMD Phenom II X4 970 
                    4C 4T @ 3.5 GHz
                 | 92 | 
|   | Intel Celeron G1610 
                    2C 2T @ 2.6 GHz
                 | 92 | 
|   | AMD Phenom II X2 521 
                    2C 2T @ 3.5 GHz
                 | 92 | 
|   | Intel Core m3-6Y30 
                    2C 4T @ 0.9 GHz
                 | 92 | 
|   | AMD A10-9700 
                    4C 4T @ 3.5 GHz
                 | 92 | 
 Cinebench R11.5, 64bit (Multi-Core)
    Cinebench R11.5, 64bit (Multi-Core)
|   | Intel Core i3-4158U 
                    2C 4T @ 2.0 GHz
                 | 2.2 | 
|   | AMD Phenom II X3 700e 
                    3C 3T @ 2.4 GHz
                 | 2.1 | 
|   | AMD Phenom II X2 521 
                    2C 2T @ 3.5 GHz
                 | 2.1 | 
|   | Intel Core i5-4200Y 
                    2C 4T @ 1.4 GHz
                 | 2.1 | 
|   | Intel Celeron G1820T 
                    2C 2T @ 2.4 GHz
                 | 2.1 | 
 Cinebench R11.5, 64bit (Single-Core)
    Cinebench R11.5, 64bit (Single-Core)
|   | AMD FX-4320 
                    4C 4T @ 4.0 GHz
                 | 1.1 | 
|   | Intel Celeron G1820T 
                    2C 2T @ 2.4 GHz
                 | 1.1 | 
|   | AMD Phenom II X2 521 
                    2C 2T @ 3.5 GHz
                 | 1.1 | 
|   | Intel Celeron G1820T 
                    2C 2T @ 2.4 GHz
                 | 1.1 | 
|   | Intel Core i5-4360U 
                    2C 4T @ 1.5 GHz
                 | 1.1 |