those numbers are looking real good!! and with the lower cpu voltage.
if the gpu is stable at it's over clock...then what you do now is up your qpi by 1mhz the run cpu test 1 only. pay attention to the code it gives if or when it crashes.
if it competes..then try to run the whole thing right after. some times you will need to reboot then run the test. as you work up to 4608 mhz your scores will go up.
grrr, i should have gotten around to running that test with the 190.56 drivers. i ran it with the 186.18