Currently, I am in the process of transitioning from console peasantry. I own a very low end HP laptop with specs just barely good enough to run Half-Life 2 on low. Not to mention the CPU has a major overheating problem. My interest in PC gaming has metastasized astronomically since I began getting my feet wet within the Steam community...my friends from WoW...etc. Therefore, It is time for an upgrade.
I own a Dell Dimension 4700 pre-built desktop from years ago that is also crappy, slow, and near dead. It runs XP, albeit extremely slowly (Im not sure as to which part(s) causes this). It is micro ATX case. My plan would be to upgrade the motherboard, CPU, and ram for right now (major budget) in order to tide me over until i can save up good money for a brand new high end custom setup.
The parts im considering:
im keeping a 300 watt PSU and the HDD from my old computer
What I need help with:
Would I bottleneck my new parts with the likes of an old hard drive? As far as I know, the hard drive works perfectly fine. Also, would XP be fine to keep with these new parts?...buying a new OS is a stretch at the moment.
Would these parts be good choices for running games like WoW, Garrys Mod, Portal 2, Dayz, Wildstar.. seamlessly smooth (Low graphics settings is fine)?
Are there any tweaks I can make to the parts I want to buy that would benefit me more?
Thanks in advance for any and all help, I hope i provided enough information:)
EDIT: My budget isnt really a set number, Id just like advice and direction on the lowest cost setup I can build to game in low settings seamless and smooth.