I play a ton of games (Far Cry, Assassins Creed, Skyrim, Fallout, etc), but currently all on their lowest settings. Rome II is the big one I am getting ready for haha. So for what games and resolution, I want to simply say 'the best I can'.
I live in Canada.
As for space, I'll have to find my tools and open it up, but in the meantime, below are the port specs as per Dell:
Ports, Slots & Chassis
USB: 10 external USB Ports (4 front, 6 back); 2 internal USB ports
Audio: Three back-panel connectors for line-in, line-out, microphone-in, two front-panel connectors for headphone-output and microphone-in
Other: Serial, PS/2 for Keyboard and Mouse, RJ-45 (10/100/1000 Ethernet)
So from what I've seen in pictures, it looks like without a hard drive in the lower cage of your case you actually have plenty of room for just about any graphics card. However, we really need you to measure the maximum depth and length that you have available inside your case for a GPU as some cards are gigantic.
As for GPU recommendation, you really can't go wrong with either an AMD Radeon HD 7970 or an Nvidia GTX 680. My personal vote would be for the 7970 as its GPU compute abilities are what set it above the 680 for me.
I was looking at the AMD 7970, but I didnt think it would work because Dell says my power supply is:
350W, 115/230VAC (Equipped with Selector Switch) 50/60Hz
100 ~ 240 V A.C 50~60Hz, Power 130W
Also as I side note, when I was looking at the 7970 prices there were all kinds of variations: "XFX", "Sappire", "VisionTek", etc... and I dont understand what the differences are.
You're definitely going to need a new power supply. Very few decent cards operate off the PCIe express bus power alone, meaning you need a PSU that has PCIe power plugs (6/8 pin PCIe power) so at a minimum you'll want a decent 550W+ PSU.
XFX, Sapphire, MSI, Gigabyte, ASUS, and so on are all board manufacturers whereas AMD/Nvidia make the GPU itself the board partners make the cards. Good brands are the ones I just mentioned.
Thanks! Okay well reading up and listening to you guys, I think I am going to pick the AMD 7970. However, as for as a new power supply I was reading up on Corsairs and they have many different models that I am interested in (CX750, HX650, GS600, TX650M). Does it matter which one I pick for the 7970? Is one of these better than they other? They all seem quite similar to me.
Glad we were able to help. All of those are excellent power supplies, and you can't really go wrong with any of them. However, I'd recommend the SeaSonic X Series X650 Gold as it's pretty much unbeatable in terms of features and the most important factor: handling and delivery of power. If you are absolutely set on a Corsair PSU then go with the CX750 or the HX650, however, I really have to recommend the Seasonic X650.