OK after actually having some time today here's what I found

6970 bios 1.175v and 1.6vdimm I was running 925/1400 and I never had an issue. 950 would restart driver in bc2 nam.

I went reading about the shader unlock bios that keeps the 6950 1.1v and 1.5vdimm. So I flashed to it, unlocked shaders and kept 6950 volts, 925 restarts now but I can run 900/1375....

So for 24/7 use people might want to compare... seems to me right now 6950 volts with 1536 shaders makes more sense since my core doesnt scale for crap with 1.175 anyway and I havnt really pushed the memory above 1400 to find out how high it goes.
From past ddr5 ATI cards seems kinda pointless anyway since 1400 is already 5600mhz effective correct?