Slot coolers and spot coolers are a bit crap but are okay if you really really need them

Get some 80mm fans, it shoild be IN at the front and OUT at the back. There should be more fans pulling air out then drawing in. That way you get a good flow.

I would call them back and 81tch like h3ll. Otherwise replace the hs & fans with replacements from a reputable company such as Thermalright (they make great heatsinks) and Arctic Cooling (best quiet fans available). Also as mentioned above adding a case fan in the front would definately help, if you have the available real estate within your case. Hope this helps, Mav.

+1

Wasn't warranty supposed to be issued by the shop, instead of manufacturer? AFAIK, faulty product goes back to the shop where it was purchased from. They have to guarantee for the parts and they are the ones that ship it back to the manufacturer.

Anyway, it sounds to me like the heatsink is not tight enough on both CPU and GPU, or they haven't used proper thermal paste when they assembled it.

i strongly suggest buying a better cpu heatsink, seeing as i have a gemini cpu heatsink for my phenom x4 9850 and it runs on maximum load at 55C it idles between 32C-40C
i use my computer for gaming and 3d simulations, i have a large case however so i suggest that you measure the distance from the motherboard to the top of your case make sure there is at least 8inches of space and 6inches of width though they make many other cpu heatinks the gemini is only from 30-45 dollars i got mine for 30.
artic silver is a great choice.

also get this program here
http://www.alcpu.com/CoreTemp/
its helpful for checking cpu load and temp
core temp its free
good luck and dont forget dell is not going to do a whole lot for an extra 90 dollars just slap on another cpu or heatsink and charge you shipping.