I was able to install niresh mavericks 10.9.0 in my machine (i7 4770k, nvida gt760, asus b85m-e, realtek 8111F lan) with minimum effort(only 1 bootflag) .
Everything works ok (bootloader,sound,video,lan )but there is a very BIG problem: even tough my lan is active and i can connect via PPPoe (direct connection) my internet speeds are very and i mean VERY SLOW (barely can load pages). I also have windows in this machine where im able to download at 10mb/s therefore internet speed should not be an issue.
I tried installing different kexts, disable IPv6, change mtu, full&half duplex but nothing works.
Anyone else had this problem before and he/she was able to solve it ?