Gigabyte P35-DS3L problems

philjayj · 28 Aug 2008 at 13:59

Hi. I have just built a new machine using an Intel Q6600, a Gigabyte GA-P35-DS3L and DDR2 800 RAM, but I'm running into some problems when overclocking.

I have overclocked the CPU to 2.9GHz and the RAM to 808Mhz. When I save the settings and reboot the machine, the BIOS and Windows shows the new speed.

However, when I shut the PC down and reboot, the CPU reverts back to 2.4Ghz, but when I look at the BIOS settings, they are still set to the overclocked settings. This happens every time I change the BIOS seetings to OC the CPU.

I also can't seem to overclock beyond 3GHz (at a push) without underclocking the RAM.

Any help would be appreciated as the main reason I bought this setup was to overclock the CPU a bit.

Thanks

Meloco · 28 Aug 2008 at 14:19

What are u using to show cpu speed?

Also, underclocking the ram is not a bad thing. It's normal if your ram can only run at 800mhz. But 3ghz seems quite good for that chip.

philjayj · 28 Aug 2008 at 15:49

After shutting down the PC totally, and rebooting, the CPU speed is shown in the BIOS, and then in system properties within windows. It always goes back down to 2.4Ghz.

Meloco · 28 Aug 2008 at 15:57

RLBUHT said:
After shutting down the PC totally, and rebooting, the CPU speed is shown in the BIOS, and then in system properties within windows. It always goes back down to 2.4Ghz.

ignore windows, a few people had problems with it's reading

edit: try a program called CPU-z

philjayj · 28 Aug 2008 at 17:09

I'm just running CPU-Z, and it says the multiplier is 6 but the BIOS reports 9.

naudiz · 28 Aug 2008 at 17:16

That'll be speedstep then, EIST and somthing else beginning with C in the BIOS

philjayj · 28 Aug 2008 at 17:22

Should EIST be disabled?

Meloco · 28 Aug 2008 at 17:50

RLBUHT said:
Should EIST be disabled?

doesn't have to be. Load up something (like steam, or a game, or internet). Should go up to 9.0, then back to 6.0. If it's doing that then you are ok.

RJC · 28 Aug 2008 at 18:20

EIST & C1E if you want to disable speedstep.

philjayj · 28 Aug 2008 at 21:24

Unfortunately, it appears I can only reach a maximum overclock of 2.8ghz with the RAM underclocked to about 780mhz.

marc2003 · 29 Aug 2008 at 07:46

have you upped the vdimm to 2.1v (+0.3)? also bump up the mch voltage a notch too. (+0.1v). then with the system memory multiplier at 2, that will keep your ram at the same speed as the fsb. 400x8 for 3.2ghz should be a doddle with maybe just a little bump on the vcore to stabilise the cpu.

Meloco · 29 Aug 2008 at 09:59

RLBUHT said:
Unfortunately, it appears I can only reach a maximum overclock of 2.8ghz with the RAM underclocked to about 780mhz.

How did you underclock your ram to 780mhz?

philjayj · 29 Aug 2008 at 10:19

By changing the system memory multiplier. If I tried overclocking the RAM to anything over 800mhz, it would just crash on startup.

Meloco · 29 Aug 2008 at 14:09

RLBUHT said:
By changing the system memory multiplier. If I tried overclocking the RAM to anything over 800mhz, it would just crash on startup.

that's what happened to myn. I'm on a P31 board though and the lowest multiplyer is 2.00 :mad:

marc2003 · 29 Aug 2008 at 15:21

RLBUHT said:
By changing the system memory multiplier. If I tried overclocking the RAM to anything over 800mhz, it would just crash on startup.

then don't overclock your ram. even at stock, you could get to 3.6ghz - 400x9 but only if your chip/cooling is good enough.

philjayj · 29 Aug 2008 at 16:26

then don't overclock your ram. even at stock, you could get to 3.6ghz - 400x9 but only if your chip/cooling is good enough.

I've even underclocked the RAM at one point, and that still didn't work. I've also left the RAM at stock speed, and still nothing.

Apart from changing the system memory multiplier, what else should I change, and what to?

Thanks for your help.

marc2003 · 29 Aug 2008 at 16:37

did you make the voltage changes i mentioned above?

philjayj · 1 Sep 2008 at 20:20

Hi Marc, sorry about the late reply. Got called away with work.

I am looking at the mobo settings within the BIOS (under the MB Intelligent Tweaker) and I can't find any references to vdimm or vcore.

I have:

DDR2 overvoltage control
PCI-E overvoltage control
FSB overvoltage control
(G)MCH overvoltage control
CPU voltage control

Many thanks

marc2003 · 1 Sep 2008 at 20:33

RLBUHT said:
DDR2 overvoltage control (this is vdimm - adjust this to +0.3)
PCI-E overvoltage control
FSB overvoltage control
(G)MCH overvoltage control (this is mch - set to +0.1)
CPU voltage control (this is vcore - keep bumping up in small increments while testing for stability. depending on chip, you don't really want to be using more than 1.35v to get to 3.2ghz. but anything upto 1.5v is fine for higher clocks, maybe even more depending on your temps/cooling)

those are the only settings i've toyed with - i have the same board/cpu as you - see sig.

philjayj · 1 Sep 2008 at 21:07

Well those settings appear to be working, I've shut down and re-booted a number of times and all seems well...until I ran Orthos and I got a BSOD (it started dumping physical memory).