Quote Originally Posted by G0ldBr1ck View Post
#1 Mem Controller cannot be higher than HT link. If you try it will always set itself back to default of x10.
#2 The grayed out Mem voltage in AOD is normal.
#3 If you have tryed each stick one at a time and tryed another set of ram and still dont get a voltage increase when set. That realy leaves nothing but a problem with a PWM/VRM on the motherboard a physicaly defective part on the board unable to change voltage when requested. Before confirming this I would see if you can get a change of any kind ie...higher/lower switching from epp to spd and if still no changes in voltage of any kind it would have to be the board.

That may be what they replaced last time. I would research and see what the part was they replaced

oh ya, one more thing the PSU you ended up using, did you use a 24pin main and a 8 pin at cpu? if not this may lock out any voltage increases wich in turn the bios may be switching back to spd after seeing incorect epp volts.

Sorry I couldn't reply earlier. The site was down.

Did you mean memory controller frequency cannot be higher than Hypertransport frequency with this motherboard??
I think that I read somewhere that some AM2+ motherboards prevent you setting them at different frequencies. I did not realise that this was one of them.
If that is not what you meant then you have it the wrong way around. The Hypertransport frequency/multiplier cannot be higher than the CPU Northbridge(memory controller) frequency/multiplier.

Good news about about Mem VTT in AMD Overdrive. At least I am not the only one

About the PSU yes I used the main one with 8pin CPU plug. They both have 24pin power plug. The other has only a 4 pin powerplug. The motherboard didn't like it at all. I'm not sure why.

Everthing that I have tried the voltage has always been the same. It is not possible to decrease DDR2 voltage in BIOS. You can only increase it.
I tried decreasing the memory controller multiplier and the Hypertransport frequency to see if there would be any change but there was none.
I probably should have mentioned it before but increasing the HTT reference clock does increase the CPU Northbridge(memory controller)frequency.
The frequency is always 10x the HTT reference clock regardless of what I change its multiplier to in BIOS.

As for the defective component I think this is definitely the most likely scenario.
When I received it back there was a sheet enclosed with it. It think its more for their own internal use rather than anything else. Its location is given as U185. Being an inquisitve soul I searched the motherboard for it. It is underneath and in-between the two orange x8 PCI-express slots.
According to the sheet the part is called 10HL6-180477-20R CLK GEN ICS9LPRS477BKLFICS. It means nothing to me apart from CLK GEN which I'm guessing is clock generator. Long shot but perhaps that part number means something to someone. I also phoned Gigabyte the same day to ask them about it. The bloke on the phone had no idea what it was.