Isn't playing intensive resource hog games increasing CPU temperature normal? At least this was the case with my Pentium 4.
I may be wrong, but I'm going to say there is nothing wrong with your temperatures. Your normal temperature of 45 seems decent. I would expect it to be a little cooler however.
As mentioned, try attaing good airflow; and ensure your computer case's air vents are not covered, or next to a wall or other objects.
I'm thinking perhaps your airflow isn't the best, as your graphics card could be affecting it; due to the mere size of the card.
All the best.