Suggest you download CPUID CPU-Z here run it and click on the memory tab then note the timings. Go to the Corsair website and compare the results from CPU-Z with the recommended timings for your memory. You may find the frequency your RAM is running at is less than the Corsair figure but thats OK.
Another thing to try is to go into your BIOS and look for something like "load failsafe defaults" and "load optimized defaults". Take the first one and see if that makes a difference, if so try the second. Now for the disclaimer... altering the BIOS settings always carries a risk so its up to you.
Good luck with it.