Apples and oranges?

Actually, according to the configurator on the HP website, an rx8640 with 16 cores with max RAM only uses 3.96KW, even with internal disks.... But then that's a bit apples and oranges, 16 cores is just two cellboards or half an rx8640. Or, come quad-core Itaniums, just a quarter of an rx8640 (or rx8660, or whatever they'll be calling it then).

Agreed, I can see the point of Rock at the webedge, they have scalding performance for webserving as long as there's nothing more complex than serving up static pages. However, if you want those webservers to do anything fancy like a bit of SQL then suddenly even old Xeon canes T1 systems. And the reality is a lot of companies just want a commodity front end, they take the path of least resistance (to them change means additional risk) so they don't even go for Linux, they just go with Windows on blades.