Intel Core i5 661 review

A dual-core chip with quad-core rivalling performance and built-in graphics? Intriguing

Intel Core i5 661
The Intel Core i5 661 is a thoroughly intriguing chip

TechRadar Verdict

Fusion may be the future. But for now, this CPU-GPU chip costs too much and delivers too little.


  • +

    Very fast for a dual-core chip

  • +

    Graphics core less awful that we expected


  • -

    It's still pretty awful

  • -

    Way too expensive for a dual-core chip

Why you can trust TechRadar We spend hours testing every product or service we review, so you can be sure you’re buying the best. Find out more about how we test.

Giving a dual-core processor performance to rival many quad-core chips is quite an achievement. Intel has managed just that with the Core i5 661. Problem is, it also costs as much as many quad-core processors.

The challenges for the dual-core Core i5 661 begin with Intel's own Core i5 750 and 760 chips. Both are cheaper than the 661 but pack a pair of extra cores. That's a fundamental advantage that even the Core i5 661's clever HyperThreading technology will struggle to overcome.

However, things get really silly when you consider the opposition from AMD. Not only does AMD offer a slew of quad-core chips for less money, including the range topping Phenom II X4 965 Black Edition. Even the six-core Phenom II X6 1055T is cheaper. Crazy.

Of course, what none of the chip above can offer is the Core i5 661's integrated graphics core. Exactly how much that is worth, however, is another matter.

The TechRadar hive mind. The Megazord. The Voltron. When our powers combine, we become 'TECHRADAR TEAM'. You'll usually see this author name when the entire team has collaborated on a project or an article, whether that's a run-down ranking of our favorite Marvel films, or a round-up of all the coolest things we've collectively seen at annual tech shows like CES and MWC. We are one.