need points on NF7-S 2.0 to measure vcore, 5v and 12v lines

[Ewok]

can anyone tell me the points on the NF7-S 2 where i can measure vcore, 5v and 12v lines. i know i can measure 5v and 12v off a molex straight from the psu but i dont trust this and want to see if i get the same voltage reported on the board itself as i do off the molex. also need to measure vcore to see if its the same as the bios is reporting, im sure its not.

[BrainStorm]

Man, nobody knows? I sent an email to the guy at Lost Circuits, we'll see if he responds (although I asked the question in a more generic sense - not specifically for NF7-S v2).

[PimpJack]

brainstorm.. another avatar!!

I believe u can measure 5v on the cpu mosfets. Take positive from the middle cut off leg and then ground. I read a thread where ppl were adding 5v rail to that point so this should be the best place to measure.

[BrainStorm]

The guy from Lost Circuits only answered the question with respect to measuring the Vdimm. I'll try sending another email asking about the cpu and vdd also.

For the memory voltage, his answer is:

As for the DIMM voltages, it is really easy, all you need is measure the 7th pin on the lower left (could be upper right depending on the orientation) of the DIMM slot against ground. Even if you don't count right, it does not matter because the adjacent pins are 1.2-1.4V, so as soon as you hit 2.5-3V you know that you are where you are supposed to be. There are two different voltages, one for the DRAM core and one for the DQs (I/O buffers) and those are tied together to a common source on the mainboard so it does not matter which one you hit.

[SAE]

@ pimpjack

That was on Epox 8rda boards.

I tried that some time ago on the middle legs of those mosfets facing east (with legs) and got a measurement point for +12 rail. For me it was at 12,34V :D

Vcore, Vdimm etc. I don't know by now

:confused:

[Ewok]

yup its the 12v line on tue mosfets which shows this board is using the 12v line for cpu not the 5v.

my theory IS correct, measuring direct off a psu molex is NOT accurate.

cpu mosfet reads 12.51, molex off psu reads 12.64. under load is yet more difference. my 12v line drops to 12.46 under load, molex stays on 12.51.

molex idle = 12.63
molex load = 12.63

mosfet idle = 12.51
mosfet load = 12.46

mbm/bios idle = 12.04
mbm/bios load = 11.98

proof there that neither mbm/bios OR measuring direct off a psu molex will give you anything like whats really going on. also proof that a new psu might well help me a bit since voltages are dropping slightly under load.

NOW for the biggest revelation. measuring vcore off pin 7 of the HIP6301 chip (4th pin down on the right) it shows a vcore of 1.82. At the same time, its SET at 1.80 in the bios and reads 1.73!!!!!!!! in mbm/bios. So the mbm/bios is reporting a very large undervolt when the voltage regulator chip is actually showing that its OVERVOLTING by 0.2v!!!!!!!! On top of that it stays at a constant 1.82v idle AND under load, while the mbm/bios fluctautes from 1.73 to 1.70. Of course i may have done something wrong here but i cant see what.

[PimpJack]

I don't think u have much to worry about with the 12v line. It seems very strong in ur case. I'm glad to hear that the nf7 uses 12v for cpu since my psu (vantec 520) has massive amounts of amps on the 12v rail. Stronger than any other psu i'v researched. I think its 28amps so thats a lot of power to give out.

[BrainStorm]

Originally posted by Ewok
yup its the 12v line on tue mosfets which shows this board is using the 12v line for cpu not the 5v.

my theory IS correct, measuring direct off a psu molex is NOT accurate.

cpu mosfet reads 12.51, molex off psu reads 12.64. under load is yet more difference. my 12v line drops to 12.46 under load, molex stays on 12.51.

molex idle = 12.63
molex load = 12.63

mosfet idle = 12.51
mosfet load = 12.46

mbm/bios idle = 12.04
mbm/bios load = 11.98

proof there that neither mbm/bios OR measuring direct off a psu molex will give you anything like whats really going on. also proof that a new psu might well help me a bit since voltages are dropping slightly under load.

NOW for the biggest revelation. measuring vcore off pin 7 of the HIP6301 chip (4th pin down on the right) it shows a vcore of 1.82. At the same time, its SET at 1.80 in the bios and reads 1.73!!!!!!!! in mbm/bios. So the mbm/bios is reporting a very large undervolt when the voltage regulator chip is actually showing that its OVERVOLTING by 0.2v!!!!!!!! On top of that it stays at a constant 1.82v idle AND under load, while the mbm/bios fluctautes from 1.73 to 1.70. Of course i may have done something wrong here but i cant see what.

Nice work! Where did you find out about the HIP6301 chip?

[m0rm0r]

Originally posted by Ewok

NOW for the biggest revelation. measuring vcore off pin 7 of the HIP6301 chip (4th pin down on the right) it shows a vcore of 1.82. At the same time, its SET at 1.80 in the bios and reads 1.73!!!!!!!! in mbm/bios. So the mbm/bios is reporting a very large undervolt when the voltage regulator chip is actually showing that its OVERVOLTING by 0.2v!!!!!!!! On top of that it stays at a constant 1.82v idle AND under load, while the mbm/bios fluctautes from 1.73 to 1.70. Of course i may have done something wrong here but i cant see what.
Use winbond hardware monitor v16 from abit, it will show higher vcore then mbm. mine dows undervolt according to mbm but in hardware monitor it does not, it rather overvolts a little.

[Hognert]

Originally posted by Ewok
yup its the 12v line on tue mosfets which shows this board is using the 12v line for cpu not the 5v.

my theory IS correct, measuring direct off a psu molex is NOT accurate.

cpu mosfet reads 12.51, molex off psu reads 12.64. under load is yet more difference. my 12v line drops to 12.46 under load, molex stays on 12.51.

molex idle = 12.63
molex load = 12.63

mosfet idle = 12.51
mosfet load = 12.46

mbm/bios idle = 12.04
mbm/bios load = 11.98

proof there that neither mbm/bios OR measuring direct off a psu molex will give you anything like whats really going on. also proof that a new psu might well help me a bit since voltages are dropping slightly under load.

NOW for the biggest revelation. measuring vcore off pin 7 of the HIP6301 chip (4th pin down on the right) it shows a vcore of 1.82. At the same time, its SET at 1.80 in the bios and reads 1.73!!!!!!!! in mbm/bios. So the mbm/bios is reporting a very large undervolt when the voltage regulator chip is actually showing that its OVERVOLTING by 0.2v!!!!!!!! On top of that it stays at a constant 1.82v idle AND under load, while the mbm/bios fluctautes from 1.73 to 1.70. Of course i may have done something wrong here but i cant see what.

The reason for this is that a modern motherboard got a number of filters and different protections to avoid instability or danger for the components. You will no mather what always have a small voltage over these components. And the bigger the current the higher it will be.

Of course its possible to bypass these things allthough they are there for a reason and I wouldnt recommend doing so. Some did this on older boards by soldering wires directly to the mosfets feeding them 5V directly from the PSU, thus bypassing a filter on the board.

[Ewok]

just tried winbond 16 and as i expected it shows pretty much the same voltages as mbm and the bios. 5v, 3.3v, 12v all identical and vcore pretty much the same also jumping around from 1.73 to 1.76.