Par : CMoiDisDonc

A noter que ces caches sont utilisés par le processeur à un niveau bien plus bas que l’OS (peu importe celui-ci).
Cette astuce n’a aucun intérêt.

Do not change the SecondLevelDataCache entry
Some third-party sources have erroneously reported that modifying the SecondLevelDataCache registry entry in HKEY_LOCAL_MACHINE\System\CurrentControlSet \Control\Session Manager\Memory Management can enhance system performance. The second level (L2) cache is recognized by the operating system and is fully utilized regardless of the setting of this parameter.

Source : Microsoft
https://technet.microsoft.com/en-us/library/cc938581.aspx?tduid=%28326300a16852c83db0bcbe59425919cf%29%28152407%29%282363559%29%280700ko6a0efr%29%28%29&f=255&MSPPError=-2147217396