BOSTON - Advanced Micro Devices Inc. (AMD) shed a little more light on its previously disclosed plans for dual-core processors
Monday, announcing that it has completed its design for dual-core server and desktop processors and will ship products in
2005.
Both dual-core processors will be based on the company's AMD64 technology, said Fred Weber, vice president of engineering
for AMD's Computation Products Group. That architecture includes 64-bit extensions to the 32-bit x86 instruction set as well
as an integrated memory controller that helps AMD move to dual-core designs, he said.
A dual-core chip is simply two separate processors on a single chip. In order to deliver the sharp increases in performance
that have characterized the chip industry for over a decade, chip designers have been looking for another way to increase
performance without increasing the chip's clock speed and therefore the amount of power it consumes.
The industry appears to have settled on dual-core designs as the way it will keep those performance gains going through the
middle part of this decade. Sun Microsystems Inc. and IBM Corp. have already released dual-core chips for servers as a way
to increase performance without resorting to faster clock speeds, and therefore increased power consumption.
Intel Corp. recently laid out its dual-core strategy, with plans to release dual-core processors for servers, desktops and
notebooks next year. In May, it canceled plans for the single-core Tejas and Jayhawk processors in favor of dual-core desktop
and server chips for which code names have not yet been released.
The power leakage issues brought on by the switch to the 90-nanometer process generation has accelerated the shift to dual-core
designs. But those smaller leaky transistors have also made dual-core chips a more economically feasible proposition because
manufacturers can now fit two smaller cores on a single die without decreasing the number of chips cut from a silicon wafer,
said Dean McCarron, principal analyst with Mercury Research Inc. in Cave Creek, Arizona.
The integrated memory controller and Hypertransport interconnect technology present in the AMD64 architecture allow AMD to
produce a similar amount of performance from one dual-core chip as provided by a dual-processor server, Weber said.
AMD's technology is designed to connect up to four Opteron processors without a chipset as required by other processors, McCarron
said. This makes it easier to connect the processors on a single piece of silicon, since the connection wires are already
built into the chip, he said.
"They already had a multiprocessing design, they're just changing the physical location of where the processors are," McCarron
said.
AMD's dual-core server processors will share a single memory controller, Weber said. This won't create a bottleneck because
a server with two Opteron chips, and therefore two memory controllers, already has more than enough memory bandwidth required
to run that system, he said.
"It's always a juggling act to add a little more processing and a little more memory. Right now, we have plenty of memory
and I/O bandwidth, so we're adding processing," Weber said.
The dual-core chips will work with current socket technology in motherboards that are rated for the specifications of the
dual-core chips, Weber said. A BIOS change will be required, but otherwise the chips will work in the same sockets as single-core
Opterons, he said.
AMD will also continue to offer three power ratings for its dual-core server processors, Weber said. The company currently
offers chips rated at 30 watts, 55 watts, and 89 watts, and will continue to do so for dual-core chips, he said.
The dual-core chips will be manufactured on AMD's 90-nanometer process technology, Weber said. AMD is currently ramping up
its 90-nanometer process technology with the first 90-nanometer chips scheduled to be available later this year.
The dual-core server chips will launch in the middle of 2005, while dual-core desktop processors will follow in the second
half of 2005, Weber said.
E-mail
Printer Friendly
Reprints
(InfoWorld) - In the litigious world we live in, deploying a unified communications platform in your enterprise could...
