I've done a lot of dice benching. Dice gives around -60C to -75C base temp on a good well made pot, preferably a solid pot. Overall it evaporates slower then ln2, and is warmer, so is a good intro into ln2,or just for all time benching. Many benchers use dice on video cards as well though its not as easy to control temperature wise, as your adding pellet or ground up dry ice.
Both require refilling of course as you bench.
Don't pick it up with your bare hands either or ull get burned. So in recap, wear gloves, buy a nice aluminum dry ice pot, use a shot to a shot and a half of acetone or vodka in the base of thepot to improve surface area, and insulate properly.