Memory Issues

Kobrakai · 30 Sep 2007 at 01:00

If I try to overclock my E6600 using Gigabytes C.I.A2 dynamic overclocking in the BIOS I get blue screens in windows complaining about memory. I read somewhere (sorry I lost the link) that the FSB : DRAM should be set to 1:1 to resolve the problem, is this correct?

That would mean that my PC6400 Ram would run at the same as my CPU bus speed which is 266Mhz * 2 for dual channel = 532Mhz rather than 800Mhz as it is supposed to be. It all sounds a bit weird having to underclock the ram so much but it solved my problem and allows me to overclock the CPU.

Also if I increase the voltage of the RAM to 2.1 (currently defaults to 1.8) could that be the cause of the blue screens when running the RAM at 800Mhz as this is what voltage Corsair suggest for my ram? If so how do I go about doing that on a Gigabyte P35 DQ6 motherboard as Ive looked everywhere and can’t find it.

CyZMyAssBaby · 30 Sep 2007 at 01:05

If your ram voltage is 2.1 as corsair state set the ram at the recommended voltage. Under volting the ram by default 1.8 in bios can cause instability problems as you describe in your above post. Reset ram voltage in bios and enter timings manually.

Cob · 30 Sep 2007 at 01:07

Set the DDR2 Overvoltage Control option to +0.3 to get 2.1v.

Kobrakai · 30 Sep 2007 at 01:25

I tried increasing the overvoltage control to +0.30 but CPU-Z still says the voltage is 1.8:

Also why is there 2 sets of timings? (see screenshot)

Cob · 30 Sep 2007 at 01:33

That always says 1.8v.

Everest and probably Speedfan will tell you that it's 2.1v.

CyZMyAssBaby · 30 Sep 2007 at 01:34

Leaving CPUZ out of the frame for the minute. Are you still getting BSOD's? after you have amended the memory voltage to 2.1v via the bios?

If you have set ram voltage in bios to 2.1v (as Cob points out +0.3v) (I presume your +0.30v is a typo error?)

CyZMyAssBaby · 30 Sep 2007 at 01:38

Cob said:
That always says 1.8v.

Everest and probably Speedfan will tell you that it's 2.1v.

Cob · 30 Sep 2007 at 01:50

Kobrakai said:
Also why is there 2 sets of timings? (see screenshot)

They're pre-programmed timings. The Memory tab will tell you the current timings.

Kobrakai · 30 Sep 2007 at 01:52

CyZMyAssBaby said:
If you have set ram voltage in bios to 2.1v (as Cob points out +0.3v) (I presume your +0.30v is a typo error?)

No not a typo, in the BIOS the setting "DDR2 overvoltage control" all values I can choose have leading zeros.

CyZMyAssBaby said:
Leaving CPUZ out of the frame for the minute. Are you still getting BSOD's? after you have amended the memory voltage to 2.1v via the bios?

Still getting the BSOD's, and right before them a windows error that I havent been able to read properly in time. This only happens when overclocking, its otherwise perfectly stable.

Setting the system memory multi (SPD) to 2 allows me to overclock the CPU and remain stable, but this underclocks the RAM by almost 300Mhz.

Cob · 30 Sep 2007 at 02:09

Is the system stable with the CPU at stock and the memory on the x3 System Memory Multiplier (800mhz)?

Kobrakai · 30 Sep 2007 at 02:23

Cob said:
Is the system stable with the CPU at stock and the memory on the x3 System Memory Multiplier (800mhz)?

Yes its stable with those settings.