Intel Core i5 655K review

Intel's new K Series chip delivers Extreme Edition features in a mainstream dual-core processor

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Our Verdict

Intel makes some outrageously good CPUs. This isn't one of them. It's the wrong chip at the wrong price.

Product features

  • Processor Core : Dual-core (2 Core)

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  • Fast for a dual-core chip
  • Lots of overclocking options


  • Too expensive
  • Integrated graphics is redundant

In this modern age of multi-core CPUs, can dual-core really cut it in an enthusiast chip? Intel obviously thinks so. How else to explain the Core i5 665K?

One of a pair of new K Series processors aimed at overclocking addicts, the Intel Core i5 665K's stand out feature is an unlocked CPU multiplier. Previously only found on ultra expensive Intel Extreme Edition models, an unlocked multiplier allows for CPU overclocking without stressing other parts of the system.

Indeed, it's the unlocked multiplier that explains why the Core i5 665K is marginally more expensive than the closely related Core i5 661 despite a slightly slower 3.2GHz standard operating frequency.

What's harder to justify is the how the dual-core 665K stacks up against quad-core processors from Intel and AMD. The likes of the Intel Core i5 760 and AMD Phenom II X4 965 Black Edition are both cheaper and more powerful. As for the six-core AMD Phenom II X6 1055T, the less said the better.

Tech Specs

Product TypeProcessor
Processor CoreDual-core (2 Core)
Thermal Design Power73 W
Processor ManufacturerIntel
Product FamilyCore i5 i5-600
L3 Cache4 MB
Clock Speed3.20 GHz
Processor SocketSocket H LGA-1156
Brand NameIntel
64-bit ProcessingYes
L2 Cache256 KB
Product Seriesi5-600
ManufacturerIntel Corporation
Product ModelI5-655K
Product NameCore i5 Dual-core I5-655K 3.2GHz Desktop Processor
Package TypeOEM
Product LineCore i5
Manufacturer Part NumberCM80616003174AO
Manufacturer Website Address
Marketing Information

With intelligent performance that accelerates in response to demanding tasks, such as playing games and editing photos, the Intel Core i5 processor moves faster when you do. The Intel Core i5 processor automatically allocates processing power where it's needed most. Whether you're creating HD video, composing digital music, editing photos, or playing the coolest PC games with the Intel Core i5 processor you can multi task with ease and be more productive than ever.

Process Technology32 nm