I found a interesting registry edit at the awesome netbook to enable L2 cache on the Acer Aspire one.
Here it is in a nutshell:
Using regedit locate the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\SecondLevelDataCache
Edit the value changing the 0 to 512. A reboot is required before the change is effected. This should provide a slight boost in performance.
When this is set to 0 the L2 cache size is automatically detected by Windows by reading CPUID info back from the processor. Setting it to any other value overides the size windows has determined, it is only useful on old processors where L2 cache size could not be determined automatically.
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