Overclock P4 1.8A using Gigabyte GA-8IGX

[sarahtiff]

Hi,
Installed a P4 1.8A in a Giga-byte 8IGX mobo with 256Mb DDRRAM (333 MHz). Unfortunately, I have been unable to configure my ram to 333 MHz while setting my FSB to 133MHz and keep the system stable running WIN XP. My choices from the BIOS were:

Frequency/Voltage Control screen in bios
=============================
CPU Host Freq (MHz) : 133 125 133 <------- choose from 100 to 350 increments of 1 unit possible
PCI/AGP Divider : PLL/16 PLL/16 PLL/16 <------- choose from disable, PLL/40, PLL/32, PLL/24, PLL/20, PLL/16
Host/DRAM clock ratio : 2.0 2.66 2.66 <------- choose from 2.0, 2.66, or auto

Memory Freq (MHz) : 266 333 354
PCI/AGP Freq (MHz) : 33/66 31/62 33/66

DIMM Overvoltage control : Normal Normal +0.3V <--------choose from +0.1V increments
AGP Overvoltage control : Normal Normal Normal <--------choose from +0.1V increments
CPU voltage control : 1.6V 1.6V 1.6V <--------choose from 1.5V incrementable by 0.025V

=========================================
Resultant PC speed (GHz) 2.40 2.25 2.40(unstable)

Unfortunately, there is no option in the bios to lock the PCI/AGP divider at 33/66 MHz.
Also, setting the Host/DRAM to 'auto' sets the ram to 266 MHz.

Unless Giga-byte decides to upgrade the bios to support DDR333 ram, I am forced to leave my CPU running at option 1 above. Help please, does anyone else have this problem?

 

[Tummy]

Hi - I have the same motherboard as you and noticed something similar although slightly different.

First of all, i have an option to set ddr333 if i have fsb=133. Also, I tried fsb=166 and 1:1 ratio (2.0 multiplier in bios) and was unsuccessful getting 166fsb on the ram but I don't know if that was because my ram was unstable or not (I have a feeling it is bad ram). Anyway, the weird part here for me is that you mention you have 200, 266, auto as your ram options. On my 8IGX, I have multiplier settings instead of ram settings, and it's 1.5, 2.0, or 2.5. So at 133fsb, 2.5*133=333 (ddr333).

 

[MadTom]

Hi,

I've the following:
P41.6A
8igx with F5
2x Kingmax 256MB DDR333 CL2.5

Unfortunately I ran into the same problem - and now the reason (doesn't help us...)

When you put a 400MHz based processor in the board (1.6A, 1.8A...) then only the 3:4 setting is offered in BIOS (in fact 2.0 and 2.66), but when using a 533MHz based processor (2.26, 2.53...) then the MB automatically gives the 4:5 option what would corespond to a 333 MHz for the memory...

And - having same problems as Tummy when using 2 memory sticks (however, it seems that one is not working like it should as it gives lockups even when running "normally" at 266MHz and with slowest memory timings). Will try to change the other one.

Something that maybe will help you: when OCing the BUS to 133 the system was less stable then when OCing it to 135 MHz. Of course I used then 270 MHz for the memory. For now it seems more stable (but only with one stick of RAM).

However, I'm not very happy with this MB, and hope that somebody will give us a tweaked BIOS which will open new memory settings.

Tummy, which BIOS revision are you using?