I just bypass bios 1463, but the 1487 is very stable for average overclock.

You can use bios 1463 to select vcore range till 1.6v, but u still needing to bridge the overclocking debug jumper to have all overclocking settings enabled.

Remember that even newer bioses (1487) let u enable the enhaced power slope to give a small vcore and stability increment.

so E6600 B2 Lapped @ 3.45Ghz 1.30V (Default) Tt Big Typhoon Lapped 45º C Full Load| 1066Mhz Boot strap + 40% | 1500Mhz FSB | 4x 1GB Corsair 667 C4 XMS2 @ 950Mhz C5 5-5-15 | Bios 1487

24H Orthos dual, blended stable and cpu also. Rev 305, very nice board