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To: pgerassi who wrote (240324)	9/12/2007 6:35:10 AM
From: FJB	Respond to of 275872

I could have sworn I heard something different on conference calls. I will try to listen again when I have time and get back to you. Joe might know about this too. Edit: I did a quick Google and found this. The XT4 machine is based on the single-socket variant of the Opteron 1000 series of processors, which means that Cray does not have to deal with cache coherency overhead and issues in the XT4 server. (The XT4 is the upgrade to the "Red Storm" XT3 machine that Cray built for the U.S. Department of Energy.) The XT4, as well as a special massively parallel machine called the XMT, were announced in November 2006. itjungle.com

To: pgerassi who wrote (240324)	9/12/2007 6:43:36 AM
From: FJB	Read Replies (1) \| Respond to of 275872

I am almost sure they use the single-socket variety. I will do more checking... Thanks for your patience. Maybe the Phenom was for new systems?

To: pgerassi who wrote (240324)	9/12/2007 7:06:03 AM
From: FJB	Respond to of 275872

Jaguar is a combination of XT3 and XT4 systems. XT4 are single-socket which is in the press release for them. -- Advanced MPP architecture -- the system is capable of peak petaflops performance, scaling upward to as many as 30,000 AMD Opteron processors. The design delivers balanced performance using single-socket processor nodes with local memory and direct interprocessor communications, as well as a low-jitter operating system. This dramatically reduces the bottlenecks and connection difficulties associated with large cluster systems built from off-the-shelf commodity server components. marketwire.com