IP35-E won't run RAM @ 1066 when FSB overclocked.

B@Th*nG · 16 Oct 2011 at 12:03

I've done various tests and i've determined that when overclocking my CPU the RAM i have (corsair dominator) will not do 1066mhz. If i remove the overclock it's fine, so it must be the board. Any suggestions? Here's my BIOS:

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Diggsy · 16 Oct 2011 at 12:43

4 sticks or 2? I have found my IP35 Pro will not do much above 800mhz when overclocking with 4 sticks, yet would easily do 1000mhz with 2.

B@Th*nG · 16 Oct 2011 at 13:00

just 2x Corsair Dominator 8500

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B@Th*nG · 16 Oct 2011 at 13:05

i assume it's the northbridge which is the problem?

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B@Th*nG · 16 Oct 2011 at 13:09

i've changed the thermal paste on the Northbridge now... no difference

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Diggsy · 16 Oct 2011 at 13:11

Your VTT looks too low, here are my settings - quoted from before...

My settings for 3.6 (my chip is a 1.3 VID)...

External Clock - 400
Multiplier - 9x
DRAM Speed - 1:1:25 (DDR2-1000)
PCI-E - 100

CPU - 1.52v (1.42 or so under load)
DDR2 - 2.0v
CPU VTT - 1.23v
MCH - 1.29v
ICH - 1.05v
ICHIO - 1.5v
DDR2 REF - 0%
CPU GTL 0+2 - 67%
CPU GTL 1+3 - 67%

Limit CPUID MaxVal - Disabled
C1E - Auto
Execute Disable Bit - Enabled
Virtualisation - Disabled
EIST - Auto

RAM - By SPD

...you will need to watch the PWM temps. My board is bolt modded and I have a 60mm fan hovering above the PWM area keeping them cool. You may well need the bolt mod if it's not already done... http://www.xtremesystems.org/forums/showpost.php?p=2330347&postcount=751

I also have 2x 40mm fans on the Northbridge, as it can get pretty toasty too.

Bear in mind that the above setting was when I was running 4gb RAM. I am still at 3.6 with 8gb, but have to run the memory on a different divider so that it runs at 800mhz. Any more was too much for the board to cope with.

EDIT - for what it's worth I found that anything above 1.3 for the MCH would cause instabilities. For some reason my board prefered the MCH to be kept fairly low.

EDIT - also bear in mind the IP35's tend to overvolt the RAM a tad.

B@Th*nG · 16 Oct 2011 at 13:41

i've effectively tried that already, with the exception of these bits:

CPU GTL - 67% (i've only had this to 65%, and i only have one option for GTL, not two, as it's not the pro version)

Limit CPUID MaxVal - Disabled
C1E - Auto
Execute Disable Bit - Enabled
Virtualisation - Disabled
EIST - Auto

will they make the difference?

also, i've added a RAM cooler, but turned it the other way so it's blowing over the NB, will see if that helps at all

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Diggsy · 16 Oct 2011 at 13:52

You've tried increasing VTT voltage?

If so then you may be out of luck. I know the E boards were never quite as good as the Pro boards for clocking

B@Th*nG · 16 Oct 2011 at 14:01

ye, the max i've tried is:

CPU - 1.42
DDR2 - 2.1v
CPU VTT - 1.23v
MCH - 1.45v
ICH - 1.05v
ICHIO - 1.55v
CPU GTL 0+2 - 65%

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Diggsy · 16 Oct 2011 at 14:19

Keep the MCH down, I found anything over 1.3v gave problems.

I would fiddle around with the VTT. Try pushing it a little higher, one step at a time. I take it you are running a Q6600? Have you tried 9x multi and a different divider?

B@Th*nG · 16 Oct 2011 at 14:31

i have just noticed that after 5 minutes of prime my aux temp is 88C. hmm... what is that? The PWM? i think that might be it you know... when i got the q6600 i got a H60 (enclosed water cooling thing) so there's no air going over the PWM HS anymore.

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Diggsy · 16 Oct 2011 at 15:33

You can check the PWM temps with HWMonitor 1.16. All versions after that stopped monitoring it for some daft reason. If you can't find it I can upload it for you.

B@Th*nG · 16 Oct 2011 at 17:36

i'm 99% certain that the aux temp is the PWM, it's by far the hottest thing in the list and its the hottest thing in my case. Think i'll pick up a little 40mm fan or something and see what happens

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Diggsy · 16 Oct 2011 at 17:59

Double check it using HW Monitor 1.16 to be certain. I've uplpoaded it for you, I assume 64bit will suit?... http://www.mediafire.com/?m8nkh7j2bywnuq8

EDIT - just noticed, CPUID still host the older versions... http://www.cpuid.com/softwares/hwmonitor/versions-history.html

B@Th*nG · 16 Oct 2011 at 18:02

coolio...

HWMonitor is calling it AUXTIN. maybe it's different on the pro board?

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Diggsy · 16 Oct 2011 at 19:22

B@Th*nG said:
coolio...

HWMonitor is calling it AUXTIN. maybe it's different on the pro board?

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That's definitely not it on my board, you should be able to look further down HWMonitor and under 'abit UGuru 2005' there are lots of voltage entries and temp entries. PWM is there, and it's about 20c higher than AUXTIN at the moment on my system...