I use my computer for gaming mostly at 1080p, I have an i5 230 with 8 gigs of ram and a Asus GTX 660 ti and 2 hard drives 1 for gaming and a ssd for the OS, is it worth it to upgrade to a newer cpu and motherboard?
I was thinking of updating to a Asus Maximus VII Ranger and an Intel i7 4790 or maybe an i5 4670k.
Outside of benchmarking scenarios you wouldn't notice a significant difference from the i5-2320 to the 4670k. The same goes for the i7-4790. Unless you're running applications for video or photo editing or are chasing high benchmark scores it's not worth it to swap out your CPU + motherboard.
You'd notice a greater improvement in games if you upgraded your GPU to a GTX 770 or 780.
In terms of CPU's, I'd sit this generation out if I were you.