Ram Light on?

[M1k3H]

I'm trying to optimize my overclock and while doing so when the RAM was OCed somewhere above 175x5 = 875Mhz => 1750 (max stock is supposed to be 1600)
the pc started, stating only 4gb of ram, I restarted and set the ratio one step lower but there's a light on the mobo that has come on since. The ram quantity is back to 6gb now.

I'm including a picture, tried to make it as clear as possible. It's a blue led just under the 1st stick.

Anyone knows what it means?

Specs in my sig.
Ram is Corsair XMS3 C7 3x2gb

 

[M1k3H]

okay rig passing prime95, now on its 8th hour and going, light is still on

 

[M1k3H]

Been 2 days. System passed a 24hour of prime95 stable. Light is still on

no one encountered this? Tried searching google, but found nothing. Even the manual seems not to mention anything about that led.

 

[M1k3H]

I have the same board, that blue light has been on on my board ever since i first got it, stock speed or overclocked. Not sure either what it's purpose is tbh.

I built a computer for a friend , with this same board and his light came on 2 weeks ago, now mine. Can't help thinking it is something that will go wrong