Ram prices dropping? And also need help

Also my system won't run these rams at 2400Mhz, it's only running in 2133Mhz, I have tried changing the bios using xmp, but it always crashes and my system won't start up, any help would be great, thanks.

msi gaming G45 motherboard
i7 4770k oc to 4.3Ghz
Corsair H80i
 
Tried running cpu at stock?
And by voltage thing I mean, did you try adding some volts to ram?

I will try running my CPU at stock and see if my rams will run in xmp at 2400Mhz, I'm sure it's already running at a high 1.65 voltage already, is it safe to add more?
 
The rams ran at 2400Mhz when my CPU Isn't overclock, I think il just go back to my CPU overclock and leave my rams to run 2133Mhz stable
 
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