Questions about GIGABYTE products > Motherboards with Intel processors

EasyTune and GA-P35C-DS3R

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neilgl:
Hi Andrew,
yes it does say 1.9V on that link. How does the board know what voltage to use by default, becasue the SPD settings in the RAM (as shown by CPU-Z, not EasyTune) show Voltage 1.8V and e.g. 5-5-5-15 at 400MHz

Is there some other data in the SPD area of the RAM that we mortals can't see?

Regards,
Neil

neilgl:
Hi again,
yes the kind chap at the OCZ support forum said it may be the voltage that Gigabyte has chosen by default.
That seems strange to me as it should be 1.8V

I'm looking at this because the mobo has voltage increments of +0.1, 0.2 etc., but if you don't know what the voltage is to start with you might fry your chips.

Strangely, Gigabyte BIOS is showing voltage at 1.984V just now...

What controls that voltage  ? (given that I have not set any increase voltage in M.I.T.
i.e. M.I.T. with system Voltage Control set to Auto, shows 1.984V DDR2/DDR3 Voltage


Regards,
Neil

Regards,
Neil

neilgl:
Hi,
does anyone have the answer?
Regards,
Neil

runn3R:
Hi Neil

bios reads SPD and if it runs as DDR2 800 MHz, then it adds automatically the memory voltage by 0.1V. The reason for auto adding memory voltage is to make the board more stable and have better compatibility.

 

neilgl:
Hi Andrew,
that sort of makes sense.
It reads SPD and that shows 400Mhz 5-5-5-15, so it sets the voltage to 1.8V + 0.1v = 1.9V
(n.b. for DDR2 400Mhz =800 MHz hehe)

So that is sort of correct, but does not explain why it is at 1.984V, nor why it has to add any volts for stability. I thought DDR2 at 1.8V was the standard ?

I want to set it to 4-4-4-12, so what voltage would I add?  (BIOS seems lame with +0.1 etc.)
(that Ram is rated  4-4-4-12 at 2.1V)

Regards,
Neil

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