Hi thanks for getting back to me.
I did try what you said with running only the corsair ram but it still only clocks at 2133Mhz. Oddly enough the bios does show that the ram has xmp revision 2.0 but nowhere to enable it.The original ram also would clock at 2666Mhz when it was installed by itself too.
Im guessing the only solutiin would be to get a new motherboard that can use xmp profiles. Any suggestions?
Once again thanks
If your corsair ram only runs at 2133Mhz by itself, doesn't sound like it runs well with this system unfortunately, although if possible, you might try to make sure it runs faster on a different system to confirm the memory is ok.
Since the original memory is running at 2666Mhz by itself though, guessing it may work better if you can find the exact same kind of memory to add, or maybe similar/compatible memory if you want to just try more memory?
Unfortunately, don't deal as much with upgrades in these systems sold complete, so you may want to try to talk to more people about it (or hopefully get more feedback on the ROG forums), but if you have a store you trust, you may want to either check if they can sell you some memory that will work better, or maybe ask them to test and install it in your system for you if you would rather not replace the motherboard.
Alternatively, you can try to talk to some memory manufacturers for recommendations. There are probably others you can check with, but in the U.S. Crucial will list memory they have approved on their end for the GL12CM as below although it hasn't been checked or approved on the ASUS end, so you would need to deal with them if you run into any issues and don't know if it would work with your original memory, so you might need to replace it too.https://www.crucial.com/compatible-upgrade-for/asus/rog-strix-gl12cm
Again, don't know a whole lot about it, but have seen someone suggest trying to match the same timings as your original memory if you want to look into that and wondering if it's a good idea to use memory that supports XMP or not on this kind of system, so something else to consider.