Intel · Core i5 · 2010 · LGA1156
The Intel Core i5-661 is a desktop processor with 2 cores, released in 2010 at an MSRP of $196. It is part of the Core i5 lineup, using the 1st Gen platform, and fits the LGA1156 socket. Internally, it is built on the "Westmere" architecture. Thanks to Intel Hyper-Threading, each core can handle two instruction streams simultaneously, yielding a total of 4 threads for improved parallelism. The Core i5-661 has a base clock of 3.33 GHz and can boost up to 3.6 GHz depending on workload and thermal headroom. Intel manufactures the "Westmere" silicon on a 32nm process node. Its multiplier is locked, so any overclocking has to come from raising the base clock rather than the multiplier. This processor supports DDR3 memory. With a TDP of 87W, the Core i5-661 sits in a typical power envelope for a modern desktop CPU. Integrated graphics are provided by the Intel HD Graphics solution, so a discrete GPU is not required for display output. The cache hierarchy consists of 32KB/core of L1, 256KB/core of L2, and 4MB of L3 cache.
Clarkdale — among the first Intel CPUs to integrate a GPU on the package (dual-die MCM). GPU runs at 900 MHz, higher than other Clarkdale models.
| Brand | Intel |
|---|---|
| Family | Core i5 |
| Series | 1st Gen |
| Architecture | Westmere |
| Type | Desktop |
| Launch year | 2010 |
| Cores | 2 |
| Threads | 4 |
| Base clock | 3.33 GHz |
| Boost clock | 3.6 GHz |
| L1 cache | 32KB/core |
| L2 cache | 256KB/core |
| L3 cache | 4MB |
| TDP | 87W |
| Socket | LGA1156 |
| Process | 32nm |
| Memory type | DDR3 |
| Integrated graphics | Intel HD Graphics |
| Chipsets | H57, H55, P55, Q57 |
| Launch MSRP | $196 |
| Part number | BX80616I5661 |
| OEM / tray part number | CM80616004794AA |