Up grade the motherboard and processor of a Dell Inspiron from i3 to i5 with 6 gb of RAM and 500 hdd. and I use the Artic Silver Cleaner and Artic Silver Thermal Paste for the processor and heat zinc . The rest is history...
The repair went smooth, I took my time on getting things right the first time, so I don't have to back and to the same job twice.
Advice: Just be patients for to the kind of work that your doing and secure that the work is done right the first time.