If you meant A555LA...
Graphics are a no no, on basically every laptop. There are very few you can do this on, unfortunately yours is not one of them, you have onboard graphics.
CPU can be upgraded to the i7 4510U, which is the next one in line, and also the last one.
RAM can also be upgraded to a max of 8GB DDR3 1600 MHz SDRAM.
Hope this helps!