what is the base damage for a huge impact great sword?

[fel_horfrost]

Playing a half orc titan fighter wielding a large greatsword with the impact enchantment. I plan on drinking a potion of enlarge person to make myself large. So does the damage progresses like this for a greatsword

Medium 2D6-> large 3d6-> huge 4d6-> gargantuan ?d6

Not sure what a gargantuan greatswords base damage is?
Can anyone help me out?
Thanks in advance for any help.

[Chengar Qordath]

6d6

[Avoron]

Further explanation can be found in this FAQ.

[fel_horfrost]

Nice almost makes me want to take the vital strike line with that kind of base damage 6d6-> vital strike 12D6-> improved vital strike 18d6-> greater vital strike 24d6. Add in lunge and an enlarge person potion that's a 15 foot reach.

[mplindustries]

If you have a feat to spare, yeah, Vital Strike is ok, but NEVER use Vital Strike instead of trying to full attack. 6d6 looks impressive, but it only averages 21 damage. Str 26 (+8 bonus x1.5 = 12) plus power attack at 8 BAB+ (+9 damage) does 21 damage, too. Since that won't be all you add to an attack, Vital Strike is definitely not worth it as an "all the time" kind of thing.

[James Risner]

I just scream with excitement every time I see an application of that FAQ. Giddy like a school boy on a merry go round.

To OP: Yes 6d6 as mentioned above.

[Nefreet]

There's like 8 that I do that to as well.