Hi, I have an old unused Dell pentium 4 computer which i thought i could revamp and update. I have been reading as much as i can about how to build/update a computer but there are still some things i am unsure of. I basically want to make a computer that will be good for gaming so i understand that i will need to get a new motherboard, cpu, gpu, ram and hard drive. Are these the only things i need to replace or will i not be able to use the old computer? I thought it made sense to use the old dell because then i can take advantage of the already existing fan, usb plugs, optical drives, case and power supply etc. Any help would be much appreciated, Thanks