Gamers Depot has posted a review on AMD´s Thunderbird. Here a clip:

One new feature that that AMD is touting is their new "Exclusive Cache". This is simply the way they have their integrated cache split up, and how they don´t share resources. On the first generation Athlons, there was 512KB of cache, of which the Level 1 cache took up to 128k of. This only left you, in some cases, with 384KB of effective Level 2 cache. As you can see in the diagram below, each cache scheme is totally separate giving this new chip even greater performance.

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