Its been three weeks from now since i was able to tweaked my system it was great and it boosted from 4GHZ to 6Ghz of my ram. Support fans could stable your ram against overheating..
BTW its similar to my motherboard and its CPu..when you want to overclock in your CPU,RAM OR GPU make sure your fans are on the right spot or slot where the ram and cpu are located..nice case or big case are good for this with many fan outlets. Search for a specific spec of pc so that you can able to apply it precisely...Always choose 2nd options and the rest is auto..Goodluck
Maybe its a typo or I didnt understand the sentence.. But I been building PC for quite a while and I did not know or hear a RAM that has 4Ghz frequency,
As far as I know, the lastest RAM technology in the market(will be released 3rd quarter 2014) is DDR4 with frequency range from 1333Mhz to 3000Mhz , thats only 3.0 Ghz at its highest...
If you mean CPU, 6Ghz is possible but you will need a premium motherboard and Probably a liquid nitrogen Cooling system..
6Ghz is just Insane!! haha... even if you have liquid cooling or, 10 or 20 cooler Fans that wont probably work...