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Tukwila (processor)

Tukwila is the code-name for the generation of Intel's Itanium processor family following Itanium 2 and Montecito. It was released on 8 February 2010 as the Itanium 9300 Series. While its features have not been publicly disclosed in detail, it utilizes both multiple processor cores (multi-core) and SMT techniques. The engineers said to be working on this project are from the Alpha project, specifically those who worked on the Alpha 21464 (EV8), which was focused on SMT.

Named for the city of Tukwila, Washington,[1] Tukwila was previously code-named Tanglewood. However the name coincides with the Tanglewood music festival, and Intel renamed the project in late 2003.

The processor has two to four cores per die and up to 24 MB L3 of on-die cache. They are the first batch of processors to contain more than 2 billion transistors on a single die.[2][3] This total is made up as follows:[4]

  • core logic — 430 million.
  • system interface — 157 million
  • L3 cache — 1,420 million
  • I/O logic — 39 million
  • chip total — 2.046 billion

Die size is 21.5×32.5 mm or 698.75 mm².

Xeon compatibility

It has been publicly disclosed that Tukwila and its associated chipset would bring socket compatibility between Intel's Xeon and Itanium processors, by introducing a new interconnect called Intel QuickPath Interconnect (QuickPath, previously known as Common System Interface or CSI). This ultimate endeavor would help reduce product development costs for both Intel and its partners, by allowing for greater reuse of components and manufacturing processes.[5] Tukwila is reported to have four "full" QuickPath links and two "half" links.[6]

Whitefield, the first Xeon processor to feature QuickPath, suffered significant project delays and was cancelled.[7] Currently, the first Xeon MP processor to feature QuickPath is Beckton.[8]

The released Itanium 9300-series processors are using a separate socket, LGA 1248, which is incompatible with Xeon processors and motherboards.

Comparison table

Model Cores Threads Core Clock
Core Clock with
Intel Turbo Boost (GHz)
L3 Cache (MiB) QPI speed
February 2010 Price Comments
9310 2 4 1.6 N/A 10 4.8 130 $946 Low power consumption
9320 4 8 1.33 1.46 16 4.8 155 $1,614 Value
9330 4 8 1.46 1.6 20 4.8 155 $2,059 Performance per watt
9340 4 8 1.6 1.73 20 4.8 185 $2,059 Price performance
9350 4 8 1.73 1.86 24 4.8 185 $3,838 Performance


The successor is code-named Poulson. It was initially slated for a Q4 2009 release and said to have over four cores, most likely eight.[9][10]

More recently an Intel representative stated that Intel would maintain a two-year development cycle for Itanium, implying Poulson would be released in Q1 2012.[11]