Hard disk connectors, yes.
To be honest you're better off buying the machine as you want it, buying a sub-par rig and then upgrading parts will ultimately cost you more money. Do you know any technicians or have friends who have assembled PCs? I'd recommend asking one of them to assemble you a tower from parts, that way you can get exactly what you need and if you're buying components you'll save money compared to a pre-assembled machine.
That card you listed will more than run Oblivion, it's not much of a performance benchmark these days, any medium spec card for the last 4 years will run Oblivion on full specs.
To be honest you're better off buying the machine as you want it, buying a sub-par rig and then upgrading parts will ultimately cost you more money. Do you know any technicians or have friends who have assembled PCs? I'd recommend asking one of them to assemble you a tower from parts, that way you can get exactly what you need and if you're buying components you'll save money compared to a pre-assembled machine.
That card you listed will more than run Oblivion, it's not much of a performance benchmark these days, any medium spec card for the last 4 years will run Oblivion on full specs.
.
