Okay, i do know some about temps, and your cpu is above average, but okay if thats load.
BUT your gpu is overheating. About 105C is tops on a gpu. It'll start to throttle at that temp, and shut down over 110C! ATIs might e abit hotter at shutdown, but not much.
Your problem is airflow. Dells and factory prebuilts have horrible airflow. So if you can't remove the heat you just store it.
My system is an oc'd q6600 with a high Vcore of 1.36V and 2 gtx 260s overclocked. All in an Antec 900 case.
Great airflow, and in the right spots.. my gpu folds 24/7 and sits at 70-77C depending on projects. 3dVantage only hits 65C
My cpu, with aftermarket cooler will peak at 66C, but I need to reTIM it, as its 3yrs old.
Heres mine running prime95 at max power/heat mode... its 57C.
The max temp was achieved on a linX run, which is more heat inducing.
Your biggest issue is dells SUCK for changing cases, and i think thats your only way to cool it off. Try run ning sideless and see how things go.