[ RipjawsX ] F3-17000CL7D-4GBXHD 4X2GB DDR3 2133MHZ

[kolos30]

My specification:
ASRock z68 extreme4 gen3
RAM:4x2GB [ RipjawsX ] F3-17000CL7D-4GBXHD
Intel quad core i5 2500K

Please help me with settings for 4 memory chips to run 2133mhz.
2 memory chips work perfectly for 2133mhz, but the 4 memory chips motherboard will not boot and restarts and memory began to work on 1600mhz.

[Tradesman]

Best bet would be a 4 stick SET or getting a 2x4GB set (best for 8GB, less stress on MC with only 2 sticks), mixing sets, even of the same model can be problematic and may not work at all, especially in these high frequecies. If you want to try, with two sets, XMP won't work right, so you'll need to Install the sticks manually ensure the base timings are picked up correctly, set the CR (Command Rate) to 2T, will prob need about 1.7 for DRAM voltage, though can start at 1.65, will also prob need to raise VCCIO voltage. Further will have to manually set up the OC on the CPU, prob want a min of 4.4 (maybe higher)