Here's the benchmarks I ran on my new 1.25 GHz 15 inch PB http://ladd.dyndns.org/xbench/merge.xhtml?doc1=33359&doc2=1&setCookie=true Overall score was 105.4 and I ran Xbench several times and all scores were within +/- .5. The CPU scores compares as expected to a Quicksilver ( 800 MHz ), but the overall score is brought down in comparison. Lower score come from the harddrive performance ( expected ), the "thread" performance ( due to the large 2 MB cache in the Quicksilver ), and the OpenGL performance. If the thread performance is due to the cache then 512k L2 DOES NOT make up for 256k L2 and 2M L3. I'm still looking into how that compares to 1M L3. Not sure about the OpenGL test. Interpretations???