8. SiSoft Sandra Benchmarks, Continued

In battery mode and having selected the "Max Battery" power scheme, the CPUs in both machines run at 600 MHz. Thus, the results for both notebooks are almost identical.

Both mobile PCs score good marks in this benchmark. The theoretical maximum memory bandwidth is 2100 MB/s (DDR2100-RAM). This gives a performance difference of just under one percent. And that's despite the fact that the PCG-Z1SP DDR memory works with a standard cache latency of 2.5, while the IBM T40's memory operates at CL2.

The identical CPU speed accounts for the memory bandwidths of both devices being identical for test-accuracy purposes when "Max Battery" is set. Memory access, after all, always depends on CPU speed.