8x burning?

Don’t laugh I’m new to this but how do you burn at 8x I have an 851s firm GS0C
using Nero 6 and Shrink 3.1, 4x- disks ?

Is there a place to set the speed?

First check and see if the discs you are using are even capable of burning @ 8x.
Check the SmartBurn area of my Tools Guide (link in my sig). SmartBurn will tell you the maximum speed your discs will burn in your drive.

Edit: If you are using -R discs then you can’t burn them @ 8x. The 851S only supports 8x writing on 8x +R capable media (including a few ones that are sold as 4x +R).