While it's possible to improve two scores of the notebook by upgrading RAM & adding a SSD (both are priced great today), and while it's also possible that the RAM upgrade may improve the graphics score by a fraction, chances are you'd still be stuck at the graphics score as the final one. I don't see that 5.6 going to a 6.0, w/out a CPU swap that'll be costly & a gamble.
I'd say to upgrade to a SSD & max out your RAM, and let things fall where they may. You'll have a powerful notebook & likely better battery life due to not having a spinning HDD going all the time. Too, SSD's have proven to be more reliable than HDD's, I still have my first one, a 128GB Crucial m4 purchased in early 2012 & still running great. The only one I have an...