Leave it at the default if the RAM is stable. Sounds like it is. Voltage increases is hard on electronic components, so leave it as low as you can. Gaming and productivity work will verify better than even Prime95.
Wait. You said you had it at 1.5v. I assumed you already increased it. The default voltage for that RAM should be 1.2v. Is the BIOS showing 1.5v w/o you increasing it?ty i got it to 3000 mhz so far no blue screen ill leave it at 1.2v ill have my brother test it at higher frequency thanks