New RAM - let bios Auto set speed or Manually set the speed?

[octashoo]

So i installed new ram.. from 8G to 16G, from generic to corsair vengeance, from a DDR3 1333 to DDR3 1600. In my bios, via ASUS UEFI bios utility, I checked the speed, the speed is set to auto, but running at 1373, there is no 1333... should i leave it on auto or manually change it to the faster 1600, which in the bios list there is no 1600, the closest speed 1648.

MOBO: ASUS P8H67-M PRO/CSM - (manufacture says board RAM speed 1333??? but geek squad lol, said i could put in the 1600)
POWER: corsair 500W
CPU: intel i7 3770
GPU: saphirre radeon 6850.

I am guessing I can just manually set it, but seeing i am a total noob about this, I thought i would ask someone who actually knows what they're talking about.

thanks for your time!

 

[swifty_morgan]

my BIOS gives the option to run at 1600. what's wrong with yours ?

 

[octashoo]

troll.

 

[swifty_morgan]

troll.

what are you talking about ?

 

[DJDeCiBeL]

The reason you don't have the exact speeds listed is because your BCLK is set to 103Mhz (probably because of an Auto OC of some kind). If you set the BCLK back to 100Mhz, all will be back to normal and you can select 1600 as you wish.