CPU should be replaceable with one from the same family as long as the new chip has a similar TDP. GPU is questionable on ASUS machines because ASUS often does custom work on them.
Before you go buying something new though I would clean out all of the dust and repaste the CPU & GPU. It could be that they just aren't staying cool enough.
A bus station is where a bus stops. A train station is where a train stops. On my desk, I have a work station…
