Originally Posted by lilchronic
ok so my brother just came in here and over clocked my cpu and he put my ram at 1333mhz instead of 2400mhz. he said i was lucky that i got 4.8 ghz stable with my xmp profile with the trident gskill 2400mhz. he had this long story about ppl that by overclocked ram they have to overclock it tweak it and they dont realize ithat..so now im currently running 5ghz to see if its stable then he guna help me out overclocking the ram after we get this stable. he also thinks i might be able to lower the vcore a lil more
First of all you should be using Intel Burn Test to verify stability on your OC. Prime95 takes over half a day of stressing to not prove what IBT can do in under an hour.
Run IBT for 20+ passes (I do 25) at max stress and see if you're stable: http://majorgeeks.com/IntelBurnTest_d5987.html
(be sure to watch your temps, IBT will cause higher temps than Prime95)
Also, although I'm still very new to OCing Ivy/Sandy vs C2D/C2Q OCing, I thought RAM played almost zero role in your OC. I know on S775 and older it played a very large role due to RAM and FSB with how they are connected to the CPU speed. With Ivy/Sandy and any i7/i5, I was told and read that your RAM has nothing to do with your speed when raising your multiplier. This is most obvious when you do some searching on OCing RAM and it is completely independent of CPU OCing. Unless you plan on OCing through your BCLK instead of your multiplier, which would defeat the entire purpose of owning a K series chip (unlocked multi). Also if your RAM is 2400mhz RAM, then it's not "OCd RAM", that is the stock speed of the RAM and your brother either needs to do some reading of his own or look at your RAM info.
Of course faster memory is going to increase memory bandwidth and give you a boost in some applications, but if you are purely talking CPU OCing, then it does not matter when OCing a K series chip through it's multiplier:
Once we move on to the second pass, there's no discernible advantage for faster memory on our overclocked system. The Cinebench test results are every bit as unimpressive with overclocking as at stock: overclocked or not, faster memory makes no real difference (though the faster CPU clock speed definitely helps a lot).
First of all the memory is not linked to the clock speed of the CPU in Sandy Bridge. It will overclock as well with DDR3 1333 as with DDR3 2000. That being said I recommend DDR3 1600 cas 8 or 9 for most people as that seems to be the best for most users. I recommend GSkill or Corsair.
In other words turn your RAM to it's default speed/voltage and your OC is not going to become unstable unless your IMC is awful and requires underclocked RAM to run the OC.
(If I'm wrong someone correct me, but this is my understanding)
_Edited by NCSUZoSo - 1/5/13 at 2:38am