but for the open layout thing. I think it's your whole system. The reason it's lower than normal is because everything gets older, and also slower over time.
for an upgrade you have 2 choices.
1- AMD/ATI
2- INTEL/NVIDEA
number 1 is cheaper and gets you better price/quality
number 2 is more expensive but also better with heat/power usage
pretty much this. you can drive 1 track all the time, but that won't improve your driving. knowing how to drive fast on one combo, doesn't mean it carries over to other tracks. If you drive different track, you will see bl1/bl1r entirely different and you'll become faster.