The PSU specs (esp on newegg) will show you 'pci-e connector: 6+2pin ' - that's usable in either a 6pin or 8pin socket (the +2)
If this PC of yours only has one PCI-e slot, or you're absolutely certain you won't be adding any more cards to it, that 600W I linked will work solidly for you.
That is assuming you don't also have 20+ hard-drives, 10 fans and a bunch of flashy lights
[edit] Also, avoid using adapters if at all possible. My general rule of thumb these days is if your PSU doesn't have enough native PCI-e connectors to support all your cards, you should look at a bigger PSU.
That's not exactly a cost-effective suggestion, but you'll quickly learn what you can and can't connect if you start to expand.
If this PC of yours only has one PCI-e slot, or you're absolutely certain you won't be adding any more cards to it, that 600W I linked will work solidly for you.
That is assuming you don't also have 20+ hard-drives, 10 fans and a bunch of flashy lights
[edit] Also, avoid using adapters if at all possible. My general rule of thumb these days is if your PSU doesn't have enough native PCI-e connectors to support all your cards, you should look at a bigger PSU.
That's not exactly a cost-effective suggestion, but you'll quickly learn what you can and can't connect if you start to expand.