As practice for a build I'll hopefully get the parts for soon, I tried putting together a really cheap, sub-£200 build for everyday use. I game from time to time - when I have the time - really very old games like GTA San Andreas and Rayman 3. Minecraft surprisingly works at a very respectable 50 to 60fps due to optifine and my OpenGL 4.2 GPU.
The CPU copes very well with multitasking - even though it's only got one core and two threads due to hyperthreading - running at temperatures as low as 30 degrees C!!
I fixed an old incompatible CPU fan to the graphics card since it was getting a little too hot, and now it works, on full stress, at only 47 degrees C maximum!
All in all, I'm quite happy with this build, and I'm hoping that my future AMD FX-8350 build works fine too.