PSU Rail-mod + DFI NF4, what happens?

[MAValpha]

I'm going for some all-out voltage on my BH-5, so I was thinking about modding the +5V rail on my PSU to 6.0V. (Right now it's a ModStream520, but I will probably get something more expendable for my project.) The question is, what will the new VDimm at BIOS setting of 4.0V be?

What I was thinking:
Run one PSU to the motherboard, with +5V rail set to 6.0V
Run drives and video off another, unmodded power supply

Will the DFI's VDimm:
1) still cap at 4V
2) go up to (Ratio: 4VDimm/5Vrail) * 6V = 4.8V
3) go up to (Add: 4VDimm/5Vrail) + 1V = 5.0V

Can anyone answer this? My RAM will have adequate cooling, so heat isn't a concern. I'm fairly sure it won't be 5.0V, but will it be 4.0 or 4.8?

BTW, does anyone know what other components the DFI powers with the five-volt line? I hope there's nothing critical on there...

Coincidentally, I have the same question about the DDR Booster on my DFI NF3- what happens to the VDimm when I mod my PSU and max out the Booster?

[celemine1Gig]

I'm going for some all-out voltage on my BH-5, so I was thinking about modding the +5V rail on my PSU to 6.0V. (Right now it's a ModStream520, but I will probably get something more expendable for my project.) The question is, what will the new VDimm at BIOS setting of 4.0V be?

What I was thinking:
Run one PSU to the motherboard, with +5V rail set to 6.0V
Run drives and video off another, unmodded power supply

Will the DFI's VDimm:
1) still cap at 4V
2) go up to (Ratio: 4VDimm/5Vrail) * 6V = 4.8V
3) go up to (Add: 4VDimm/5Vrail) + 1V = 5.0V

Can anyone answer this? My RAM will have adequate cooling, so heat isn't a concern. I'm fairly sure it won't be 5.0V, but will it be 4.0 or 4.8?

BTW, does anyone know what other components the DFI powers with the five-volt line? I hope there's nothing critical on there...

Coincidentally, I have the same question about the DDR Booster on my DFI NF3- what happens to the VDimm when I mod my PSU and max out the Booster?

VDimm will still max out at 4.0V. Nothing will happen. But the voltage regulators on the DFI will perhaps blow up or at least pump out heat like crazy.
So, STAY AWAY from this "mod". It'll bring you nothing but trouble.

If you really want more than 4V (which is absolutely useless IMHO), then figure out a real VDimm mod and then regulate the voltage with a potentiometer.

[MAValpha]

Is there a VDimm mod for these boards? I don't think anyone would have tried to find one yet, since 4V is more than enough for 99.99% of the world.

[jrw]

Is there a VDimm mod for these boards? I don't think anyone would have tried to find one yet, since 4V is more than enough for 99.99% of the world.

:slap: