Intel's 15-core Xeon server chip has 4.31 billion transistors

Intel's 15-core server chip code-named Ivytown will run at clock speeds from 1.4GHz to 3.8GHz

Intel's Ivytown processor family

Intel's Ivytown processor family

Intel has provided more details on its upcoming 15-core Xeon chip code-named Ivytown, which has 4.31 billion transistors and will go into high-end servers.

The Ivytown chip, which will be part of the Xeon E7 chip lineup, will likely be announced next week. Further details of the Ivytown were shared at the International Solid-State Circuits Conference in San Francisco.

With the highest core count of all Intel x86 server chips, Ivytown will likely be the company's fastest performing server chip. Intel put 12 cores on Xeon E5 v2 chips that shipped in the third quarter of last year.

Chip makers typically pile up cores to boost processor performance while saving power. The older method of boosting performance was boosting clock speed, which ultimately was abandoned as chips drew more power.

Ivytown will be based on Intel's microarchitecture code-named Ivy Bridge, which was introduced last year. The Ivytown chips will replace the Xeon E7 chips based on Sandy Bridge architecture that were introduced last year.

The 15-core chip will likely go into 4- to 8-socket servers, which typically handle high-end computing tasks such as databases and ERP (enterprise resource planning).

Ivytown will run at frequencies ranging from 1.4GHz to 3.8GHz, and draw between 40 watts to 150 watts of power. Each core will support multithreading, meaning that one Ivytown chip will be able to run 30 threads simultaneously.

The core count of 15 is unconventional, considering chips usually have either 8, 12 or 16 cores. The cores are arranged across three columns, and the chip has 40 PCI-Express 3.0 lanes.

The 15-core chip brings Intel a step closer to AMD, which has topped off at 16 cores on its latest Opteron 6300 chips. AMD's first 16-core x86 Opteron chips code-named Interlagos shipped in 2011, but the company has not added additional cores to chips since.

Agam Shah covers PCs, tablets, servers, chips and semiconductors for IDG News Service. Follow Agam on Twitter at @agamsh. Agam's e-mail address is agam_shah@idg.com

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