XP isn't handling the SSD directly, it's a virtual disk, OSX is, so forget about that.
Really, your problem is lack of hardware acceleration (why did you thought turning that off was a good idea?) and insufficient RAM for the VM, when you mention multiple tabs, the load is on the RAM, and the disk is only a matter of concern in your case when there's paging.
Last edited by a moderator: Sep 3, 2013