There was no IPC issues with Agena, it did have a throttling issue because it was 125+ watts. Everything was fixed with the die shrink, do to the better tools.
I meant how everyone was disappointed with the performance it brought when it released. Agena itself was delayed and as such people viewed the performance it brought as disappointing compared to what Intel had at the time. Phenom II was supposed to compete with the previous Intel generation, and if it did, it would've looked a lot better than it did when it launched in late 2008.
Phenom FX was two Agena dies and Phenom II FX was two Deneb dies, while the 32nm Phenom II FX was a true-octal core.
I think I remember that now. Weren't these chips part of AMD's old QuadFX platform?