Should I Update BIOS?

Demuny

Honorable
Jul 19, 2013
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10,680
Hey. My BIOS Version is 0906. My brother has the exact same pc with version 1503. The problem I'm having is that the BIOS recognizes 8GB of ram (two 4GB sticks in two slots), but says 4. Windows 8.1 64 Bit recognizes 8 GB, but says that 3.9 is usable. I checked CPU-Z, and 8GB is recognized, but it says 800Mhz when my ram is 1600Mhz? Should I update my BIOS to 1503, and is it safe?
 

Demuny

Honorable
Jul 19, 2013
242
0
10,680

I actually tried each slot on the mobo, and they all worked. It's confusing...