i read reviews of that memory working at 1866MHz on newegg so i think it will be fine really, i have really cheap crucial ram that is rated at 1600MHz and i overclocked it to over 2100MHZ and settled at a rock stable 1940MHz. If something were to happen you would have to clear the cmos with a jumper.
this is what my ram is rated at:
http://prntscr.com/1fejno
this is what my ram is at:
http://prntscr.com/1fejgs
youtube videos of it and see if you are comfortable with doing that. it really is not that big of a deal and there is not that much of a risk involved because if the memory is clocked to high then it will just reset and not start up any more till you cleared the cmos. clearing the cmos is just resetting your bios over from scratch.
and if those settings did not work you can change your timings from 9, 9, 9, 24 to 10,10,10,27 and it should run fine. MHz are better than timings nowadays, this would essentially increase the time between round trips for ram but increase the speed at which the info is processed.
now for the reason your memory seems to have these non traditional numbers there.
there are two ways to overclock your ram and CPU.
the direct control of your cpu is the cpu ratio, a ratio of 41 will mean 4100MHz essentially
the direct control of your ram is the speed in MHz and the timing control (9 9 9 24).
then you see the fsb (front size bus) or the cpu bus frequency i think is what it is called for your bios (i run intel so the wording is different). what this does is kinda get in front of both the CPU and RAM and sets a multiplier right in front of it (in your bios if you click on the cpu bus frequency you will get a short description). So if the whole thing is based on 100MHz when you increase that number it will also increase both the ram and CPU.
so your bus speeds are increased and therefore you are boosted speeds.
looking up a few of these terms using wikipedia or something will give you some better understanding.
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