Just Can't Overclock

[mralw]

Hi. this is my 1st post so please be kind. Here's my setup ...

CPU ... E6750
Graphics ... Sparkle 8600GTS 512MB
Ram ... 1.5 DDR 2
MotherBoard ... Gigabyte GA-945CGMX-S2 (rev6.6)

My problem is that the E6750 has a FSB of 1333MHz. Everytime i reboot my system i get a screen telling me i am running my CPU on 1066Mhz and would i like to change the bios so it will run on 1333. If i click "yes" then my system just freezes and i have to reset the bios.

After i have reset the bios my e6750 is then set at 2.17GHz. It doesn't recognize i have a 2.66Ghz CPU. The fastest i can get my CPU to run is 2.52GHz. I have to adjust the FSB from 266 to 315 manually. Anything above 315 will freeze my system.

All i want is for the CPU to run at 2.66GHz like it says on the box.

If my MB says it can run on 1333 then why does it freeze when i press "yes".

To be honest my system is running VERY fast but it's just of those things that bugs me and any help would be great.

thanks and Merry Christmas everybody.

 

[Pneumonic]

what RAM do you have?

 

[mralw]

I think the RAM make is Hitachi.

Here's the details of my RAM from 3DMark 06 ...


Memory Info
Total Physical Memory 1.50 GB
Free Physical Memory 931 MB
Total Pagefile Memory 3.35 GB
Free Pagefile Memory 2.90 GB

Memory Array 1/1
Max Module Capacity 2 MB
Location System Board
Use System
Supported Speeds -
Supported Types -
Supported Voltages -

Memory Slot 1/2
Installed Enabled Size 1.00 GB
Form Factor DIMM
Frequency 667.0 MHz
Slot A0 [Bank0/1]
Manufacturer None
Type Details -
Enabled Size 1.00 GB
Total Bit Width 64 b
Data Bit Width 64 b
Memory Slot 2/2
Installed Enabled Size 512 MB
Form Factor DIMM
Frequency 667.0 MHz
Slot A1 [Bank2/3]
Manufacturer None
Type Details -
Enabled Size 512 MB
Total Bit Width 64 b
Data Bit Width 64 b

 

[Pneumonic]

ok first thing to do is to take the 512mb module out and try it with just one stick... if that doesnt work find out exactly what make it is then go to the manufactures website and find out what voltage it needs to run correctly and adjust you bios accordingly... suspect its under volted and therefore when you try to run it at the higher FSB is failing or having two different sized modules is messing it up... if that doesnt sort the problem out or its running at the correct voltage then slow the timmings on the RAM down

 

[mralw]

...right here's some info from my motherboard BIOS....


Somtimes i get the option for Hyperthreading which i have disabled. Sometimes the option is not there. Strange.

The only reference in the Bios for RAM is DRAM RAS# to CAS# which i have set to AUTO. DRAM RAS# Precharge which is also on AUTO. Then we have DIM Overvoltage Control which is set to normal (other options +0.1v,0.2v,0.3v0.4v). FSB OverVoltage Control which i have set to normal ( other options +0.1V,0.2v,0.3v,0.4v)

Also in the BIOS we have CPU GTLREF RATIO CONTROL which is set to 0.67 (other options 0.65,0.63,0.615)

PCI Express Frequency which i have set to AUTO. (Other options SYC or ASYC). The ASYC function set it to 100MHZ but setting this option just resets my system (I think )

There is also the option O.C. FSB 1333 CORE.2 CPU which i have disabled. Enabling this just freezes my computer.

How would i slow the RAM timings down?

 

[ben16]

Well I'm far from an expert but I'm pretty sure you need to lock down your PCI-E freqrency, otherwise it will increase along with the FSB.

 

[mralw]

Well I'm far from an expert but I'm pretty sure you need to lock down your PCI-E freqrency, otherwise it will increase along with the FSB.

So how do i do that then? because the only options i have in my BIOS are AUTO,SYC or ASYC?

And i'm 100% sure that ASYC which is supposed to set the PCI clock to 100MHz just resets the BIOS.

 

[mralw]

Just confirmed what i thought. I reset my computer and went into the BIOS. The only thing i altered was the PCI Frequency to ASYC, which is supposed to set to to 1000MHZ and it reset my CPU to 2.13GHz.

So for PCI Frequency i have it set on AUTO. Or do do i sync with my CPU with the SYC option?