gdogg, you seem obsessed with not trying. How come with a few posts we found something out very critical about Ibis's setup yet you refuse to try? I find that very telling. Whenever you are ready to get serious let me know. Until then I will work with those that are. Interesting isn't it that the two people making all the outrageous claims haven't properly tested anything? At this point gdogg I cannot take anything you say with any credibility. You will have to rely on other members here to prove or disprove anything. I have a feeling quite a few nLite users have a broken prefetch. Try stepping back for a minute (if that is possible). The myth page, especially the optimization myth section title "XP Myths" relate to #1 Myths Regarding Windows XP. Now no matter how the large system cache tweak myth was worded, the intent was to show that using that tweak on an XP installation will not improve performance. You can clearly see it will only improve a file servers performance. That is quoted directly from Microsoft. If you want to stay hung up on the wording then by all means knock yourself out. Either way it is clearer now.Plenty of tweak sites/forums mention the LargeSystemCache tweak, they use there own wording of course and recommend enabling it for an XP installation.