associativity is usually a product of cache size though.. larger cache, higher associativity is required.. So it's not really a 'seperate' factor to cache size..

If you look at 512kb K8 Vs 1Mb K8, Pi times increase by approximatly 5%..

If you took the L3 away from K10 completely, (propus.. we need you for this discussion [that belongs elsewhere.. sorry ] ) and bumped its L2 to 2Mb, it would still fall well behind Yonah, which for the record, does spi 1M in about 23 sec @ 2.7ghz despite all the building blocks of the architectures being either equal or superior for the K10