| General |
|---|
| Model | i5-661 |
| Codename | Clarkdale |
| Segment | Desktop |
| Product line | Legacy Intel Core Processors |
| Process | 32 nm |
| Launch date | Q1 2010 |
| Status | Discontinued |
| Servicing status | End of Servicing Lifetime |
| Embedded options available | No |
| CPU |
|---|
| Cores | 2 |
| Threads | 4 |
| Multithreading (SMT/HT) | Yes |
| Base clock | 3.33 GHz |
| Max boost clock | 3.6 GHz |
| L3 cache | 4 MB |
| Bus speed | 2.5 GT/s |
| TDP | 87 W |
| Turbo Boost | Yes (1) |
| 64-bit support | Yes |
| Instruction set width | 64 bit |
| Instruction set extensions | SSE4.2 |
| Memory |
|---|
| Max memory size | 16.38 GB |
| Memory types | DDR3 |
| Memory channels | 2 |
| Max memory bandwidth | 21 GB/s |
| Physical address extensions | 36-bit |
| Graphics |
|---|
| Integrated graphics | Intel HD Graphics for Previous Generation Intel Processors |
| Has integrated graphics | Yes |
| Graphics base frequency | 900 MHz |
| Max displays | 2 |
| Flexible Display Interface | Yes |
| I/O and interfaces |
|---|
| PCI Express revision | 2 |
| PCI Express lanes | 16 |
| PCI Express configurations | 1x16, 2x8 |
| Package and thermal |
|---|
| Sockets supported | FCLGA1156 |
| Max CPU configuration | 1 |
| Package size | 37.5mm x 37.5mm |
| TCASE | 69.8 °C |
| Die size | 81 mm² |
| Transistors (millions) | 382 million |
| Security and virtualization |
|---|
| Virtualization (VT-x / AMD-V) | Yes |
| Extended Page Tables (EPT) | Yes |
| AES-NI | Yes |
| Execute Disable Bit | Yes |
| Technologies |
|---|
| Enhanced SpeedStep | Yes |
| Idle States | Yes |
| Thermal Monitoring Technologies | No |