Core i5-655K

The Core i5-655K is a 2-core / 4-thread processor based on the Clarkdale (2010−2011) architecture, manufactured on a 32 nm process node. It reaches a maximum boost clock of 3.46 GHz from a base frequency of 3.2 GHz— higher boost clocks directly translate to better single-threaded performance and responsiveness in gaming. It carries 4 MB (total) of L3 cache, plus 256 kB (per core) of L2 cache and 64 kB (per core) of L1 cache per core. In the PassMark benchmark (a comprehensive multi-threaded test), it scores 2,017, placing it in the Entry Level performance tier as a Legacy generation product. Geekbench 6 single-core (the most relevant metric for gaming FPS) records 560, while multi-core reaches 1,250.

The Core i5-655K fits into the LGA1156 socket and supports PCIe 2.0 with 16 total PCIe lanes for expansion cards and storage. It supports DDR3 memory at speeds up to DDR3-1333 (faster RAM improves bandwidth-sensitive workloads), with a maximum capacity of 16 GB across 2 channels (dual-channel doubles bandwidth). Integrated graphics: Intel HD Graphics (Westmere) — allows display output without a dedicated GPU, useful for troubleshooting and light tasks.

The Core i5-655K is primarily designed for Desktop. It features an unlocked multiplier, allowing enthusiasts to overclock beyond stock frequencies for additional performance. Virtualization: VT-x — enables running virtual machines efficiently (important for development and server workloads).

The Core i5-655K has a rated TDP (Thermal Design Power) of 73 Watt — this indicates the amount of heat generated under sustained load and determines what cooling solution is needed. No stock cooler is included — you will need to purchase an aftermarket cooler separately. Recommended cooling: Aftermarket Air.

At an average price of $55 (MSRP: $216), the Core i5-655K delivers 37 PassMark points per dollar. Performance ranking position: #2580 out of all indexed processors.