How come my 1600mhz memory is running at 1333mhz

[JAYFRESH1271]

i have a amd fx 8120 overclock to 4.2ghz just on multiplier raise the cpu voltage in Bios to 1.36 n raise LLC to extreme but my question is how come my memory runs at 1333mhz when it is 1600mhz here are my specs



Gigabyte 990FXA-UD3 AMD 990FX AM3+ Motherboard, AMD FX-8120 X8 3100MHZ 16MB 125W AM3+, Sony Optiarc 24X DVDRW SATA OEM, WD Caviar Blue 1TB SATA HD 7200/32MB/SATA-6G, Corsair Vengeance LP 8GB PC12800 DDR3 1600MHz 2x4, Thermaltake Overseer RX-I Full Tower Gaming Case, EVGA GeForce GTX 550 Ti 1GB GDDR5 PCIe 2.0, Noctua NH-D14 CPU Cooler for i5, i7, 775 and AMD, COOLMAX ZP-750B APFC/V2.3/EPS12V/V2.92 80+ BRONZE

 

[thequn]

Default for most motherboard is set to 1300 you need to go in and set it manually.

 

[MC_K7]

Just note that you probably won't see any real life performance improvement between 1333Mhz and 1600Mhz, but yes it's probably a BIOS settings like thequn mentioned.

 

[JAYFRESH1271]

Just note that you probably won't see any real life performance improvement between 1333Mhz and 1600Mhz, but yes it's probably a BIOS settings like thequn mentioned.

thanks well i been to Bios n try to change it n when i run prime95 blend test one of my cores stops n i get an error on prime95 the timing are 9-9-9-24 at 1.50v