I have bios 1504. Is there any benefit putting 1802 on instead?

Spec:

Core i7 920 D0 - watercooled
4870X2 - watercooled
Asus R2E
Corsair 6GB 16000 3x2

I managed to get PC stable on IBT for 10 runs, max mem and 8 threads:

4.1 - 21x196 ram@ 1572

vcore - 1.3
vtt - 1.325

Temps - MAX 72 70 70 66 - Was hovering around 67/68

NB/SB - 56

Gaming got to 62 59 59 57

I'm thinking I may drop down to 4ghz - 21x 191 ram@1532 as it needs a lot less volts.

Vcore 1.275
Vtt 1.23

20X200 just seems so unstable so not bothering with that. I have speedstep disabled and C1E Tech disabled also. Should I be setting any other voltages, disabling stuff etc?

Would it be better to lower it than run at 4.1 with higher volts? Really wanted ram at 1600 too, which I could get if I went to 21x200 but will need more volts.

RoEy