Device,   Clockspeed  result,       relative to N800, per clock
N800:     400MHz    448,553 keys/sec  100%  1121 keys/s/MHz
N900:     600MHz  1,001,396 keys/sec  223%  1669 keys/s/MHz
SmartQ7:  667MHz    751,596 keys/sec  167%  1127 keys/s/MHz
Sheeva:  1200MHz  1,314,021 keys/sec  293%  1095 keys/s/MHz
Atom330: 1600MHz  3,208,177 keys/sec  715%  2005 keys/s/MHz
Q9550(1):2830MHz  9,479,121 keys/sec 2113%  3350 keys/s/MHz
Q9550(2):2830MHz 10,562,046 keys/sec 2355%  3732 keys/s/MHz

Atom330 in 32bit mode.
(1) 64bit client with less optimizations
(2) 32bit client, seems to have more optimizations

Device,   Clockspeed, result,        relative to N800, nodes per clock
N800:     400MHz  1,855,943 nodes/sec  100%  4640 nodes/s/MHz
N900:     600MHz  3,642,503 nodes/sec  196%  6071 nodes/s/MHz
SmartQ7:  667MHz  3,070,970 nodes/sec  165%  4604 nodes/s/MHz
Sheeva:  1200MHz  4,986,341 nodes/sec  268%  4155 nodes/s/MHz
Atom330: 1600MHz  9,893,719 nodes/sec  533%  6184 nodes/s/MHz
Q9550(1):2830MHz 37,681,342 nodes/sec 2030% 13314 nodes/s/MHz
Q9550(2):2830MHz 46,671,019 nodes/sec 2515% 16492 nodes/s/MHz

Atom330 in 32 bit mode.
(1) 64 bit client
(2) 32 bit client with SSE2 optimizations