Intel Core i3 and Core i5 661 (Westmere) review

Intel's new budget chip brings 32nm transistors and CPU-GPU fusion tech

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With clarkdale it s actually intel s auto overclocking turbo boost feature that makes the difference core i5s get it i3s do not

Despite the doubled up i3 and i5 branding (more on that in a moment), the 32nm Westmere desktop processors released today are all essentially the same underlying chip, known as Clarkdale.

In CPU terms, it's a low end dual-core offering.

But by virtue of being the first significant PC processor with graphics processing integrated into the CPU package itself, it is nevertheless an extremely important chip.

Indeed, for many PC enthusiasts, the very idea of a CPU-GPU fusion processor is something of an abomination, an unholy alliance that bodes ill for performance.

Whatever the merits, the industry as a whole is adopting an increasingly prophetical tone when discussing fusion processors. Forgive us a Battlestar Galactica-ism, but as Gaius Baltar would say, Clarkdale is the shape of things to come.

Chip off the old block

But is it worthy of BSG's portentous orchestral movements? Well, one thing Westmere isn't, funnily enough, is a single chip. In fact, it's two squeezed into a single processor package.

The first chip, packing two processor cores and cache memory, is fabricated courtesy of Intel's brand spanking new 32nm tech. However, the second, which contains the memory controller, system I/O and that all-important integrated graphics core, defaults to the relatively old school 45nm node.

If that strikes you as something of a hodge-podge of silicon bits, you're on to something. Intel's original plan was almost definitely to put the whole shebang on 32nm. Ultimately, it was decided that attempting a first CPU-GPU fusion chip on a brand new production process was probably asking too much.

A 'true' single-chip fusion processor from Intel will therefore not appear until the end of 2010 and the debut of the new Sandy Bridge architecture - assuming that arrives on time.

Core i-what?

If all that isn't complicated enough, with Clarkdale, Intel continues to insult our sense of logic with its branding strategy. This new processor will be sold as both a Core i3 and a Core i5.

In a way, it makes sense. After all, Intel sells the quad-core Lynnfield processor as both Core i5 and Core i7. But the distinction there was the presence of HyperThreading technology. With Westmere, it's actually Intel's auto-overclocking Turbo Boost feature that makes the difference. Core i5 chips get it, Core i3 chips do not.

The upshot of all this is that consumers will be largely clueless regards the several seriously important differences between the various architectures that underpin the full range of Core i3, i5 and i7 chips.

Unless, that is, they bone up on the the triple digit suffix Intel adds to the branding, for example Core i5 661. And that's not going to happen. So clueless they will remain.

Tech Specs

Product TypeProcessor
Processor CoreDual-core (2 Core)
Thermal Design Power73 W
Processor ManufacturerIntel
Product FamilyCore i3 i3-500
L3 Cache4 MB
Clock Speed2.93 GHz
Processor SocketSocket H LGA-1156
Brand NameIntel
Green CompliantYes
Green Compliance Certificate/AuthorityRoHS
64-bit ProcessingYes
Thermal Specification72.6°C
Direct Media Interface2.50 GT/s
L2 Cache512 KB
Product Seriesi3-500
ManufacturerIntel Corporation
Product Modeli3-530
Product NameCore i3 Dual-core i3-530 2.93GHz Desktop Processor
Product LineCore i3
Input Voltage1.4 V DC
Manufacturer Part NumberI3-530
Manufacturer Website Address
Marketing Information

The Intel Core i3 processor family with Intel HD Graphics delivers a revolutionary new architecture for an unparalleled computing experience. As the first level in Intel's new processor family, the Intel Core i3 processor is the perfect entry point for a fast, responsive PC experience. This processor comes equipped with Intel HD Graphics, an advanced video engine that delivers smooth, high-quality HD video playback, and advanced 3D capabilities, providing an ideal graphics solution for everyday computing. A smart choice for home and office, the Intel Core i3 processor also features Intel Hyper-Threading Technology, which enables each core of your processor to work on two tasks at the same time, delivering the performance you need for smart multitasking. Do not let too many open applications slow you and your PC down. Get smart performance now.

Process Technology32 nm