With 100% TDP i think i would probably loose any profit i gain even with the added hash still at the same TDP it should be improved too. Lemme see what the tool say

here is what i hash for this test-rig (6x GTX 1070) on tpruvot cc-miner 1.8.4

@60% TDP (830w) tpruvot cc-miner 1.8.4

(Algo my-gr) DGB-Groestl : 391.5 MH/s - 10.68$ - 1.78$ per card
(Algo groestl) Diamond : 211.8 MH/s - 4.33$ - 0.72$ per card
(Algo groestl) GroestlCoin : 211.8 MH/s - 3.63$ - 0.60$ per card

@100% TDP (1364w) sp-mod my-gr/groestl (supposed)

(Algo my-gr) DGB-Groestl : 510 MH/s - 12.83$ - 2.138$ per card
(Algo groestl) Diamond : 270 MH/s - 4.42$ - 0.73$ per card
(Algo groestl) GroestlCoin : 270 MH/s - 3.53$ - 0.588$ per card

so the gain for groesl isn't that much, but the gain in my-gr is pretty good. Now i wonder @ equal TDP% how much of a difference there is.