AMD cuts to the core with 'Bulldozer' Opterons

[Helmore]

I am correct that's for sure, AMD has NEVER compared Bulldozer performance with K10.5 ever.

1 Bulldozer core will outperform 1 K10.5 core, and 2 Bulldozer cores(1 module) will also outperform 2 K10.5 cores for sure.

You're not completely correct on that one. AMD has indirectly provided some performance comparisons with K10.5. Just look "Upgrade to Bulldozer" part over in this article: http://it.anandtech.com/IT/showdoc.aspx?i=3681&p=3
There it states this: "Two times 4 Bulldozer modules (2 x 8 "cores" or 16 cores) are about 60 to 80% faster than the twelve core Opteron 6100 CPU in SPECInt_rate". Lets presume that's for two CPUs clocked at the same frequency to make it easier. This would mean that a single BD module will be about 20% to 35% faster than a dual core K10.5 based CPU in integer performance. In a later article by AnandTech, Anand simply states this:

According to AMD's roadmaps, Zambezi will use either 4 or 8 Bulldozer cores (that's 2 or 4 modules). The quad-core Zambezi should have roughly 10 - 35% better integer performance than a similarly clocked quad-core Phenom II. An eight-core Zambezi will be a threaded monster.

I actually wouldn't be surprised if a single BD module is at least about 10-20% faster than a dual core K10.5 CPU in general performance. Remember though, that single BD module will be about the same size as a Sandy Bridge core, maybe a bit smaller than that. Quite an achievement.

That's all still a bit speculation though. We'll just have to reserve judgement until it's launched.