Overclocking Q6600 Problems - Hardware & Software

I am having trouble overclocking my Q6600 Runs fine at 2.4GHz but will not even boot at 2.5GHz Current specs Q6600 @2.4 6GB DDR3 ram 1333MHz 9-9-9-24 (2x1GB and 2x2GB modules) 1.5v GTX560 Gigabyte GA-P35T-DQ6 motherboard I managed a stable overclock in the past at 3GHz and just want to reach this again. Since then I have added 4 more gigs of ram that have lower timings voltage and a new GPU but I was having this issue before I added it. Old Ram had timings of 7-7-7-21 and 1.8v but was also 1333MHZ I am assuming its this change that is leading to problems. I have tried different multipliers with higher FSB speeds but have the same problem all the tutorials I have seen don't seem to suggest anything. I'm pretty certain this is not normal so any help would be appreciated and I will be happy to supply additional details if needed

You can safely put up your DRAM voltage to 1.65V with DDR3 if they ain't those low power ones meant for Sandybridge. Also have you raised your Vcore at all ? And disabling power saving features help on stability usually. Umm so your previous DDR3 worked at 1.8V, because the default voltage for DDR2 is 1.8V. Is your motherboard one of those which support DDR3 and DDR2 ? if so i don't suggest mixing DDR3 with DDR2.

Nope both are DDR3 both at 1333MHz difference is 2x1 GB at 7-7-7-21 at 1.8v and 2x2 at 9-9-9-24 1.5v with all six in RAM is at 1.5v with 9-9-9-24 timings I tried upping the voltage to 1.8 for the RAM but still would not boot, I managed a stable 3GHz before without adjusting the vcore voltage at all I'm not entirely clear on how the RAM speed and CPU speed are tied together could this be my issue? Would it be worth just trying with the 2 sticks of RAM I previously managed an overclock with?

[QUOTE=cjone2;29135059]Nope both are DDR3 both at 1333MHz difference is 2x1 GB at 7-7-7-21 at 1.8v and 2x2 at 9-9-9-24 1.5v with all six in RAM is at 1.5v with 9-9-9-24 timings I tried upping the voltage to 1.8 for the RAM but still would not boot, I managed a stable 3GHz before without adjusting the vcore voltage at all I'm not entirely clear on how the RAM speed and CPU speed are tied together could this be my issue? Would it be worth just trying with the 2 sticks of RAM I previously managed an overclock with?[/QUOTE] wait if you haven't unlinked your RAM and your FSB do so immediately

Just use the 4 GB Ram and put the 2GB that run at 1.8 away.

[QUOTE=Jaehead;29135685]wait if you haven't unlinked your RAM and your FSB do so immediately[/QUOTE] OK will do got any hints on where that part/named will be in the BIOS I could not see anything in the section with all the timings voltages and speeds Thanks for the answers guys

at least for me it was on the main CPU advanced options page although it's probably your timings/volts that's throwing off your computer [editline]12th April 2011[/editline] try what Shadaez told you

Mixing heterogeneous memory modules is a bad idea in general, and you should never mix memory modules with different voltage ratings. I'm surprised you didn't fry your lower voltage sticks when you ran them way out of spec for the higher voltage modules. Generally when you upgrade memory, you want to upgrade to all new modules for the larger memory size and not use any of the old modules (unless you can find the exact model of memory still.)