As ALPHA17 said, you need to route your cables properly. But that's not the reason, at least not the main one, your gpu is overheating. You're just not getting enough air into your case.
The 80mm fan at the front is grossly inadequate. Replace with a 120mm one.
Next, i'm not sure what kind of side panel your case has, from what i've seen, the elite 330/1 has an air tunnel for the cpu and a little mesh below it, however without fan mount holes. Visually i think this can take a 80 or 92mm fan, probably not a 120. Measure this mesh and see. You can either use zip ties to rig the fan to the mesh or superglue it to the panel. This would provide cool air to the gfx card. I'm not a big fan of active side panel cooling, i rather prefer passive side intakes, because side fans would disrupt the front to rear air flow pattern, but for your cramped case, a side fan seems to be the only way to supply cool air to the gfx.
I'll give you some quick tips on cable management.
First, the space between the motherboard tray/panel and the right side panel is meant for routing cables. Whatever cables can go through there should be routed there.
For your rear fan, unscrew and rotate it so that the corner where the wire is coming out is towards the psu and mobo. Then route the wire along the top of the mobo towards the front of the case and plug it in there. It shouldn't be running over the cpu fan/mobo/whatnot. Ideally, since most mobos have two chassis fan connectors in addition to the primary cpu fan header, you should plug in your front and rear case fans into these headers if possible. That's if the fan wires end in the 3-pin TX3 connectors. If not you will need to crimp connectors on the wires, probably not a good idea if you don't know what you're doing.
edit: the xfx 650i seems to have a whopping 4 (FOUR) 3-pin fan headers in addition to the 4-pin cpu fan one. So try to use fans with the 3-pin connectors and run them off the board directly.
Next, from what i can see, the only cables that should be coming to the bottom of your case are 2xsata cables for the HDDs, 2xpower cables for the same, and power to the gfx card if required. All the remaining cables should be neatly tucked away in the top 5.25" bays.
There isn't much else that can be done, your case isn't ideal for a full ATX board. A mid-tower case should only be used for uAtx boards, full ATX need full towers especially if running a discrete gfx card.
Check this out maybe, i can't find a better link right now ...
http://en.wikipedia.org/wiki/Computer_cooling
If i remember anything else, i'll add it later...