G.skill sniper 1866 speed

Raise your FSB Frequency, start with 240 MHz and continue to go up until something close or exact is a option. If 2000 MHz is 'it' then still use a FSB of 240+ MHz and 2000 MHz DDR3. Also, this will cause your CPU to OC. OC the RAM will require at least a DRAM Voltage increase and probably a QPI/VTT/VCCIO Voltage increase at minimum.

edit: the 'Sandy Bridge' RAM offers different Frequencies than your AMD or prior Intel CPUs; your supported are: 2000(O.C.)/1600/1333/1066 MHz. I realize 1866 is a selectable option, but I too understand stability.

AMD 1100t
3300 / 200 = '16.5'
3300 / 240 = '13.75' or 14

14 * 240 = 3.36GHz
17 * 240 = 4.08GHz and will require a vCore ~1.5v and really good HSF.

Math problem:
1600/200 = 1866/X ; X = 233
The problem with 233 MHz is the it's typically not enough FSB for 1800+ {1866} MHz to run properly. The next near whole number >240 MHz is 269 MHz (269 X 7 = 1883 MHz). 1866/240 = 7.8 or 8 X 240 = 1920 MHz.

Whereas 'AMD' RAM Frequencies:
2000 MHz, 1800 MHz, 1600 MHz ALL are easily divisible by the FSB of 200 MHz (10, 9, 8) respectably.

You can try the following:
AI Overclocker Tuner -> DOCP ; FSB OC
DRAM OC Profile -> DDR3-1866 MHz
DRAM Voltage -> (spec) or +0.10v~+0.15v
DRAM Timing Control /Enter
Set the CAS timings per 'XMP-1866' as listed in CPU-z
//You may need to increase the NB Voltage if unstable//

BTW - use CPU-z to see the available JEDEC/XMP {XMP 'feature is not supported on AMD} Frequencies/CAS/Voltage supported by your Ripjaws X: