same here 1000 on 1.25v. i haven't upped the memory because it doesn't seem to do much the performance.
the extra voltage for 75mhz isn't really worth it. but good to see.
You may as well though since the memory chips are rated at 1250Mhz. I haven;t tested game performance yet but in furmark benchmark, upping the memory to 1250 certainly does increase framerates and score.