The Cray XT4 (codenamed Hood during development) is an updated version of the Cray XT3 supercomputer. It was released on November 18, 2006. It includes an updated version of the SeaStar interconnect router called SeaStar2, processor sockets for Socket AM2 Opteron processors, and 240-pin unbuffered DDR2 memory. The XT4 also includes support for FPGA coprocessors that plug into riser cards in the Service and IO blades. The interconnect, cabinet, system software and programming environment remain unchanged from the Cray XT3. It was superseded in 2007 by the Cray XT5.
Early in the evenin just about supper time,
Over by the courthouse theyre starting to unwind.
Four kids on the corner trying to bring you up.
Willy picks a tune out and he blows it on the harp.
Chorus:
Down on the corner, out in the street,
Willy and the poorboys are playin;
Bring a nickel; tap your feet.
Rooster hits the washboard and people just got to smile,
Blinky, thumps the gut bass and solos for a while.
Poorboy twangs the rhythm out on his kalamazoo.
Willy goes into a dance and doubles on kazoo.
Chorus
Chorus
You dont need a penny just to hang around,
But if youve got a nickel, wont you lay your money down?
Over on the corner theres a happy noise.
People come from all around to watch the magic boy.
Chorus
Chorus