Thank you for the comment, JQL was right only one core was working, it was not a vray problem but a windows one. I fixed on msconfig and now everything is back to normal.

Thanks again!

Hi, I am having a strange problem with vray 1.49 on sketchup 8 (trimble). Basically it is just rendering with ONE bucket whe it used to render with EIGHT. I have no idea what caused this my computer is fairly new (i7 4770, 2g video, 16gb ram, windows 7) and everything else works just fine even the previos prepasses (light cache) are calculated at normal speed but when its time for the buckets only one shows up which reduces the render time a lot.

Hope you guys can help me with this issue.

Cheers.