Generally, the Pagefile is 1.5x physical memory. The actual best size varies according to your use. Some will agree and others will disagree. You may be able to disable pagefile alltogether since you have over 512MB. The problem with this will be that you may have apps that use the pagefile and they will fuss if you remove it. Best thing to do is start with what you have, move it up to around your 1024, if it seems to hurt, drop back some. tinkering with it is the only way to find the "sweet spot"