OP: There's no way your computer will ever get over 5-10 FPS, tops with these settings. Some suggestions:
Operating System Microsoft Windows 7 Home Premium Edition 64bit (build 7600)
This is terrible. For one thing, the 64 bits are taking up a lot of Memory, and your Windows is only 7? Upgrade to Windows 98. 98 is a LOT higher than 7. It will run like, 10 times faster.
Processor Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz
You're probably going to want to replace this with a Pentium 2. They're much, much bigger processors and they have cool black housings for them. You should be able to put the Pentium in the motherboard you have now, which should still be good. If it doesn't fit, just apply pressure. Worst case, some duct tape should hold the new processor in place. Get the silver duct tape, too. It makes the processor go way faster.
BIOS Default System BIOS
This is slowing your system down. See if you can figure out how to flash your BIOS. "Flash" means it increases the speed, like a flash of light.
Physical Memory 6134.926MB
Virtual Memory 2047.875MB
Page File 12267.996MB
Storage C:\ Hard Disk Drive Total Disk Space 456.562GB Free Disk Space 373.969GB
I'm guessing you probably have 3V RAM. See if you can find some 5V RAM to replace it with. It'll run way better. As for the Hard Drive, it looks like it might be good, but it could just be cluttered with viruses and stuff. See if you can search your computer for any files ending in ".sys". Those are system viruses and probably slowing you down. Delete them to clear up some space.
Graphic Device(s) ATI Radeon HD 5900 Series
See if you can find a "Voodoo" graphics card. They're pretty rare because they're the top of the line right now, and a lot of manufacturers won't sell them because of how fast they are. You might be able to find some dumb sucker who doesn't realize how great that card is and buy it off of them. They're worth like $500 but you might be able to talk the guy into selling it for only $100-$200 if you lowball him. His loss is your gain.
Try these suggestions and you should be running XIV on max in no time. Hope to see you in Eorzea!