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Ok, I've tested this myself and its working fine.
Changed the resistor value to 1580 Ohms.
Before VDROOP:
BIOS 1.5250V - IDLE 1.5V - LOAD 1.39-1.4V
Q6600 3.6Ghz Unstable and hot :down:
After VDROOP:
BIOS 1.4875V - IDLE 1.45V - LOAD 1.41-1.42V
Q6600 3.6Ghz Orthos Stable :up: :up:
The vDroop is still there with 1.58K Ohm but it's much better! Maybe lower resistance would help, but a little vDroop is fine for me :yepp:
Nice work, I will try here, but there's not a pencil mod that get totally rid of vdrop?
The oscilations on vcore is insane in this motherboard!
I have to set 1.52v on bios to get the minimum 1.46v needed to stabilize my q6600 on 3600mhz (400x9)
Nope, the oscilation is still there :mad:
If you go below 1580 Ohms the vDroop will be lower, in theory. But I don't know how much is safe.
I will try 1400 Ohms this weekend.
Hi Andi64, i have ordered this board and will arrive next week. Ive read somewhere that doing a hard mod on vdroop is more stable, so what vr do you think should be used, 5k ohm? thanks, will anxiously wait for your tests on this mod:) .
Hi!
I think a 5K Ohm VR will do the job, it will give you about 1450 Ohms, tune down to 4K and you will have 1350 Ohms.
I think that with 1300-1200 ohm the vDroop will be near zero (+-0.02 from selected voltage because of the fluctuation :( ) but this is just guessing, I will test at night.
I'm at work right now... sorry for my English, I'm sleepy :p:
Thanks Andi64 will try it on my board, this is my first msi board coming from mostly asus boards the king of vdroop as oskar wu of dfi puts it, i got used to soldering vr's to lessen the vdroop;) .
i'll buy this board.... i'll test on e6750...
I tried here but I don't see any effect, the Vdrop is still the same.
Also with 1.6 bios de fluctuation is more present than 1.1 bios...
I think I will be back to my P5k deluxe...
Hi guys
I need pencil vmch mod for MSI P35 Neo2 FR
Any help or links would be of great help.
Tried it with a pencil, and then with 50k and 10K resistors but it doesn't work on P35D3 (same IC). :)
I've made the Vmch mod. I'll post it. I guess it'll work on other MSI P35 as well.
any updates on this? the v-droop is driving me nuts. currently doing 1.45 vcore for just 3330mhz on my allendale. @ 1.4385 computer will run for over a day, but it has blue screened since vdroop under load has hit 1.37. so far this bluescreen junked my 88% WU:down: testing it with 1.45 to see if it claims another one:sofa:
I just set the voltage in the BIOS to be stable under load factoring in the droop. I currently have my E8400 in the socket, 1.40 set in BIOS, 1.39v idle and 1.37v under 100% load at 4GHz. Considering how the chip never idles, it'll constantly be fed 1.37v. Just part of tweaking the board I suppose, especially during benching :shrug:
well, it seems the board is doing its job, i'm just dissapointed in my 4400's poor overclockability. guess i shouldnt complain though, its was a pretty decent chip for $120 at the time
btw: is there a problem with using live update on vista64? i noticed it would fail to check bios under mobo. i dont want to d/l the update and find out vista64 is responsible for trashing my bios
Are you guys going from Speedfan when reading voltage or from a DMM?
unfortunately, yes. that is the only way i can measure right now. though according to some users, the 1.6 bios is more or less accurate in terms of voltage reading when compared to a voltmeter
Cause with the 1.51 BIOS my Neo2-FR is flashed with, the mosfets around the CPU socket read 1.62v idle and 1.613v running OCCT when I have 1.625v selected in BIOS.
So I'm really hoping that I'm reading CPU vCore and not some other voltage that is scaling with what I select vCore as.
It might be right Dragon Orta. With my E2180 on a Neo2-FR, I've got 1.325 V set in the BIOS at 10x260 but Everest and SpeedFan read 1.36V idle 1.34V load (w/o pencil vdroop mod). I guess my board's vdroop isn't too bad. I'll keep this thread posted as I near 3GHz.
hey andi where did you get this info, and how has it been treating you. Any more info since the last post? I would like to vdroop mod my neo2 also.
for me vdroop is a round 0.2 until i start using higher voltages of 1.4 and above, the vdroop increases quite a bit :/Quote:
Originally Posted by 40sTheme
ok, i found the chip in the picture. It is inbetween the cpu-fan
connector and the first ram slot, that resistor is SO small!
Which revision of the board do you guys own ? 1.1 or 1.2 ?
Considering my vdroop isn't bad at all, absolutely normal I would say, it comes to question whether the pcb revision had/has any effect on that...
Unfortunately I have no clue what changes have been made between the 2 revisions ^^ so just a thought! :)
I have rev 1.2 and my Vdroop is 0.04v. I think I'll try this mod today.
thanks alot
very useful mod
is there're any relations with undervolt ..
i need pics of an undervolt p35 platinum ...
Where does one measure the vcore on this board?
I just measured from the coils around the CPU socket (IIRC)
Do you remember if it was the coil by the mosfet heatsink (which would be nearly impossible to measure without removing the heatsink) or the one by the molex connector and northbridge?Quote:
Originally Posted by [XC] DragonOrta
I measured the one by the molex connector and i got 1.412V (set to 1.4125V in bios). But then I measure absolutely 0 vdroop (even to the thousandths place). Surely this can't be correct :eek:?
Then that is the one I measured from, because I got very little vDroop as well. Something like .005 vDroop. And that was the only thing I found that measured anything that could have been considered vCore.
Ahhhh okay thanks! I never thought of measuring the inductors. I just poked around at the mosfets and found some that read 6.4, 5, 12, 1.6, and 2.1 (vdimm). The ones that give vcore are probably covered by the heatsink.Quote:
Originally Posted by [XC] DragonOrta
So far so good, running at 3.6Ghz with a Q6600 G0 for six months or so. My board is Rev 1.1, vDroop droped from 0.1v max to 0.03v max.Quote:
Originally Posted by mreld3r
It worked fine for me, I gained stability with less volts through BIOS, from 1.525v to 1.4875v right now. ~1.46v Idle 1.43v full load stable. Without the mod with 1.525v BIOS I get ~1.41v full load.
so is ther any hardmod?? I would love a hardmod but will use a pencilmod
Just did the pencil mod to my v1.2 board. Running Prime95 on my e8500 @3.9 to test. Will go to 4.0 if Prime95 stable for one hour.
Thanks for this mod. :up:
I cannot find the chip that this mod is under, can anyone give me a location?
I believe it's just above the left RAM slot.
k found it penciled it and brought it to 1.458kohms and no vdroop at all anymore :D
I went to ~1580ohms (just happened to land on the same number as OP) and vdroop went from ~.05v to ~.025v. Should I mess with it more, is NONE realistic? It was really hard to me, I've never done this before. When I finally located the resistor I thought, NO WAY... that is SO MUCH SMALLER than I expected...
mine no longer droops at just unde4 100 ohms less than yours so hell yeah none is realistic just dont pencil to far or it wont boot he he went a tad pencil happy, I wish this was a hard mod or a vcore mod I I wouldnt have to enter the bios at all, infact I would love that on every board I own, bios less overclocking :D
Well there's talk about how vdroop is kind of a safety measure and surely any electronic engineer could completely eliminate the phenomenon.
By the way, I was never close to 3.9ghz before, but I think I might be able to make it happen now... I think at 70mhz increase is going to be pretty easy though.
EDIT and I really hate to go off-topic, but what is a good/safe max FSB, NB, and SB voltage? I'm afriad to go over 1.325 on FSB because I don't know what it does, I'm afraid to go over 1.45 on NB because I know what it can do, and I'm afriad to go over 1.6 on SB because I don't know why to do it.
ive had nb maxed out on this board, same with fsb volts so with proper cooling they are safe.
Hi there, really noob question, but what you mean exactly with this pencil mod. You take a pencil and "write" over that resistor or what :D :D You need any special type of pen for that?
thx :D
yep just scribble the resistor a bit and measure resistance but dont go to far, if you do just erase and start over.
1.45 NB voltage is nothing. :)Quote:
Originally Posted by AndrewZorn
I'benched many hours with 1.65 vNB.
P35 isn't that much different then P965. I have benched a few times with a P965 @ 2.4 - 2.55v and it only crippled the P965 a bit, but never died.