Intel, AMD, IBM & Fujitsu showcase eight-core processors

Chip makers will describe plans to deliver server processors with eight CPU cores at the Hot Chips conference at Stanford University this week, though there is some debate about what the products will mean for end-users.

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Chip makers will describe plans to deliver server processors with eight CPU cores at the Hot Chips conference at Stanford University this week, though there is some debate about what the products will mean for end-users.

For a long time, vendors boosted the performance of their microprocessors by increasing the clock speed, but concerns about power consumption and heat dissipation have steered them toward adding more processor cores to each chip instead.

On Tuesday, IBM will give the first detailed look at the Power7, a follow-on to the Power6 introduced two years ago for IBM's Unix servers. The Power7 marks a big shift for IBM, moving it from a dual-core design to a new architecture that will be offered with four, six and eight cores, each able to process four instruction threads simultaneously.

IBM has said the Power7 will be available in the first half of next year. The chip will be manufactured on a 45-nanometre process, and IBM has said customers will be able to use the chips in existing Power 570 and 595 servers.

Fujitsu engineers will discuss plans for an eight-core Sparc64 processor, an update to the four-core Sparc64 VII released last July. Fujitsu mentioned the chip, code-named Venus, briefly at the end of its presentation at last year's Hot Chips but has said very little about it. The Sparc64 chips are sold in servers from Fujitsu and Sun Microsystems, though Sun's plans are up in the air since it agreed to be bought by Oracle.

AMD, meanwhile, will give a talk today about using its Magny-Cours processor in blade servers. Magny-Cours is a single-threaded, 12-core chip that combines two six-core processors in a single package, linked by AMD's Hyper Transport interconnect. The chip, named after a French motor racing track, is due for release early next year.

Intel will give an update on its Nehalem-EX chips, which will have eight dual-threaded cores and are due in the first half of next year. There will be no presentation at Hot Chips about Tukwilla, the quad-core update to Intel's Itanium processor that has been delayed several times and is now expected next year.

Also absent from the agenda is Sun's 16-core Rock processor, which had been due to ship later this year but has now reportedly been scrapped. Sun engineers will be at Hot Chips to talk about Rainbow Falls, the third generation of its multithreaded Niagara design that will be a follow-on to Sun's Ultrasparc T2.

The eight-core server parts promise to deliver vast amounts of computing power. "These chips are just incredible in terms of their scale," said industry analyst Nathan Brookwood of Insight64. "Power7 is truly an awesome processor."

But there's some debate about how much today's software - and by extension end-users - will be able to take advantage of the multi-core products. Software applications need to be written in a way that makes them smart enough to break up tasks and run them in parallel across the cores.

Gartner analyst Carl Claunch issued a bleak report on the topic in January. Chip makers are driving microprocessor cores "to peaks well above the levels for which key software - including operating systems, middleware, applications and virtualisation products - have been engineered," he wrote.

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