Will GeForce 680 work on my pre-built?

just 2 concerns, first is the case, 680's are quite big, so you might want to research the dimensions of the 680 that you will get. gpu card length can reach around 11 inch, depending on the model.

next is the psu, i don't think it was mentioned at the specs. like what brand did they use? is it 600w? higher?
680 is a beast and it needs good power to feed on. so a cheap psu is a no-no. not saying that what you have is a bad one, im just saying you need a good one.

that's about it. and my advise, for your next rig. Build it yourself if possible, read, pick the parts, it's fun. so you wont end up buying setup like this, don't get me wrong, it is a nice setup but the gpu sucks. so it's a waste of money.

a good 600w should be good, a little higher wouldn't hurt. nvidia spec'd that it needs a minimum of 550w

What kind of power supply do you have? It really is all dependent on that.

Just checked it out on newegg and this computer only has a 300w power supply  

So If you are going to upgrade you are also going to need to upgrade to a better psu. I recommend anything from Seasonic, XFX, Antec, Corsair, and a few others and all you really need is something around 600w.

dang, 300w?

when it comes to psu's seasonic is on the top of my list, i also like corsair and the others, i just like seasonic better since they actually build their own

Could anyone link a good psu for this card and rig? Would be much appreciated. Sorry I'm not good at picking

I personally use this power supply and it has worked perfectly for me.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

I'd also recommend this 680

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

That 680 comes with a factory overclock and has a decent aftermarket cooler.

budget?

http://www.seasonicusa.com/NEW_X-series_560-660-760-850...

check and go hit the store (or online), there other brands of course, mentioned by our good sir ^^^ there

err, how do you post links properly?

You may want to just get a 670 as I could not justify putting a 680 in now that the next generation is close to being released. You may also look in to getting some case fans to help ventilate that case as in my experience that case most likely only has 1 80mm intake fan with the psu for exhaust.

A good psu would probably be:

Cheaper

CORSAIR Builder Series CX600: $40 after rebate

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Nicer

Seasonic G550W SSR 550RM $86 at amazon

http://pcpartpicker.com/part/seasonic-power-supply-ssr5...

I'm going to agree with combine1237 on just getting a GTX670. The differences aren't that big and you save a lot more money and can put it towards a better PSU. I've learned to never skimp on the PSU and its good for overall stability and durability.