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Hilppa
10-29-2004, 01:58 PM
In my Asus P4C800-E Deluxe my VDimm is strongly fluctating.

Under load it's jumping between 3.45 .... 3.65 volts, idling at 3.7V.

My powersupply is OCZ 520W.

Is there a way to prevent this fluctating? For example taking a big ass wire straigth from the PSU to the memory modules?

Now I have done just the wiremod for the board, and the voltage still gets regulated through the board. I think this is holding by memories back a bit.

Also I was wondering what is the spot where to measure the VTT voltage, if it's right or not?

Btw. on Abit IC7-G my BH-5's did 265Mhz at best, on Asus 259 is impossible to pass.
Hilppa
10-30-2004, 04:21 AM
This is Xtreme Systems and no-one seems to have problems with fluctating voltages? :toast:
=[PULSAR]=
10-30-2004, 04:31 AM
Did you try and set the rail at the actual rated spec of 3.3V. It might be a problem with you trying to overvolt it. Are you also using a multimeter to measure the voltage?
STEvil
10-30-2004, 07:30 PM
If you put the tip of your DMM into the top of the DIMM (on the sides with all the tiny rectangular holes, not the center) you can measure vdimm from some, and VTT from others.

I would also suggest measuring all voltages with a digital multimeter to verify which peice of hardware is the problem.
saaya
10-30-2004, 09:01 PM
what vdimm mod did you do? sounds like a bad vdimm mod to me...
STEvil
10-31-2004, 01:52 AM
Is there a way to prevent this fluctating? For example taking a big ass wire straigth from the PSU to the memory modules?

Now I have done just the wiremod for the board, and the voltage still gets regulated through the board. I think this is holding by memories back a bit.

yeah, little more clearly please.
Hilppa
11-03-2004, 07:11 AM
VMEM MOD IMAGE (http://www.takorautaa.net/artikkelit/dryice/mod2.jpg)

I took a wire (the blue/white) from that chip straight to ground.

That way it will "trick" the motherboard to give all it get's from the 3.3V line to the memories, me thinks ;)

So would it be better to just feed the memories straigth from the PSU:s 3.3V line with a big wire? (taking the wire straigth to the vmem mosfet)?
STEvil
11-04-2004, 01:47 AM
test voltage at ram slot (poke dmm tip into small rectangular holes, not into where ram goes) and see if it is or not.