mit78

i change the cables with new ones, nothing work the same, couple months work fine, but now its a problem. in device manager all its set at udma 6 , and bluray writer set udma 5

i have a powerfull system i7 @ 4500mhz gygabyte z77 ud5h wifi 2x4gb ddr 2400mhz gtx 780 2 caviar black 1,5tb ssd samsung 830 128gb when i burn dvd buffer stay at 98%,but when i burn bluray buffer goes up and down, and burning of disc durring much longer then normal, aprox 1 hour per disc, disc it ok writed. please help me. thanks.