Which settings to set XMP or auto

ram specs here
so with xmp cas latency is 9-9-9-27 1.6v but when i set auto its 11-11-11-28 1.5v so which one is better

PC specs
cpu: i5 3470
mobo: P8Z77-V LX2
ram: Kingstone hyperx 4gb 1600mhz khx16c9b1b/4
psu: FSP RAIDER 550w
gpu: gtx 660 oc 2gb palit
3 answers Last reply Best Answer
More about settings set xmp auto
  1. Best answer
    Enable XMP and select profile 1
  2. okay thanks!
  3. No problem, Enjoy ;)
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