View Full Version : P5B-Deluxe Vcore droop Mod Help?!
(Clanger)(DOA)
12-26-06, 09:47 PM
Need some help....
I know where every thing is.... just not sure how to go about doing it..... Like checking if my VR is close to the original before i post the board?? do i just like power it on with a multi meter connected and load the cpu and adjust the VR till the droop goes away??? help.. !!?
Adjust resistance until vcore droop is as close to set vcore in bios under load.
(Clanger)(DOA)
12-26-06, 10:37 PM
right but to begin with i would check the resistance of the current resistor and get the VR as close to that as possible right?? Then under load adjust the VR till the droop is gone or almost gone?
I think the resisitance on board is 50k, you might want to start around 30k. You have to keep track when you lower resistance to how it affects vcore droop under load. Also having some droop might be good, so you might with some vcore droop.
(Clanger)(DOA)
12-26-06, 11:00 PM
so the higher the resistance the more stable vcore....??
Lower resistance equals lower vcore droop under load from selected in bios.
(Clanger)(DOA)
12-27-06, 10:43 AM
ok so if the stock resistors 50k, then id start at or around 40-30k resistance on my VR?
50k is the stock resistance. Lowering it, will at some point get rid off or minimize vcore droop under load.
(Clanger)(DOA)
12-27-06, 02:03 PM
sweet.
now in order to check the resistance of the current resistor i would use any ground and the point on the current resistor.... just to check (not that i dont belive you) the current resistors resistance. BTW thank you for your help..!!! :beer:
Here's more info
http://www.xtremesystems.org/forums/showthread.php?t=111156
OnDborder
12-30-06, 04:22 PM
Ok, so let me ask..
Is this vdroop mod suppose to solve the issue of having one setting set manually to, let's say 1.5, and having it read like 1.48 in the bios, programs,etc.
Or is a cure for the slight voltage drop when loaded up? Like set in bios, reads 1.48 idle, then drops to 1.46 loaded.
I did the pencil mod and it helped on both. Although it's not perfect,, it did improve the discrepancy in the readings and voltage drop when loaded up.
(Clanger)(DOA)
01-01-07, 04:52 PM
Ok, so let me ask..
Is this vdroop mod suppose to solve the issue of having one setting set manually to, let's say 1.5, and having it read like 1.48 in the bios, programs,etc.
Or is a cure for the slight voltage drop when loaded up? Like set in bios, reads 1.48 idle, then drops to 1.46 loaded.
I did the pencil mod and it helped on both. Although it's not perfect,, it did improve the discrepancy in the readings and voltage drop when loaded up.
thats good to know when i get my new P5B-D ill have to try it.
Super Nade
01-05-07, 01:48 PM
Voltage droop usually occours due to either imperfect working of the buck-regulator (very very rare) powering the chip in question or because of other factors like additional power path resistance. Usually, power is distributed via planes which have a PCB layer unto themselves. But additional fators such as parasitic capacitance between layers etc can degrade power supplied, i.e one may see a loss in energy. Sometimes if the VRef to the voltage regulator is dodgy you may see a droop as well.
Just to clarify, a droop indicates lower supplied voltage than that which is actually set.
Voltage droop usually occours due to either imperfect working of the buck-regulator (very very rare) powering the chip in question or because of other factors like additional power path resistance. .
or just because it is intended. Vdroop is intended on intel boards. Some boards handle vdroop better than other when being overclocked. As I remember on my p4c800 selecting 1.6v and 1.7v would give exact same underload vcore.
Super Nade
01-05-07, 02:21 PM
or just because it is intended. Vdroop is intended on intel boards.
Why?
Lowered power consumption/heat dissipation. Pretty dumb premise I know, but its part of the spec. It seems like the newer boards don't have that much of it, but the S478 boards were forced to droop. Some of the mods were able to reverse the droop and turn it into a voltage bump under load. O.o No idea how the droop is implemented exactly, but its deliberate.
P5b deluxe doesn't have any drop at stock voltage and at stock speed. But once overclocking and increasing voltage the vcore drops more. Let say if you would set resitance on the board to 0 for that droop mod. It would reverse it, under load it would increase voltage instead of dropping it within .05v.
(Clanger)(DOA)
01-08-07, 01:49 AM
my board was KIA before i could mod it. I should have another one on thurs or sat.
My motherboard said good bye last week after installing defective gfx.
lorax26
04-01-07, 08:15 PM
My motherboard said good bye last week after installing defective gfx.
That sucks.
lorax26
04-01-07, 08:18 PM
Just to clarify, a droop indicates lower supplied voltage than that which is actually set.
So does that mean that one would only need to apply a vdroop mod because they wanted to add more voltage over the max after the droop?
i.e. when I set my vcore to the max at 1.7 I get 1.65. If I wanted more than 1.65 I would need to apply the mod. Is there any other benefit?
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