I read a similar thread but the guy didn't have the same processor or as much memory. I was wondering is someone could tell me what is the "best" compatible graphics card I could run with my current setup. Thanks!
Whether that's true or not, I personally wouldn't push it. A mid range GPU might run with that PSU, but "reliably"? That's another issue altogether. A GOOD 500-550W unit can run almost any single card setup though, even though I ALWAYS err on the side of caution and recommend a bit more than needed.
A GTX 550 Ti or Radeon 6770 is the furthest I'd push it with that PSU. I don't even feel safe recommending those, but just saying that those are the highest I would go with that PSU.
If you want to go better than that, I can only safely recommend a PSU upgrade to go with it.