Please read the last part guys
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Please read the last part guys
Use a 10k resistor for the vdimm. that will make the voltage at in the bios = what the ram is actually getting +/1 ~.005volts.
With a 20k resistor you will still be undervolting.
The lower the resistance, the more power it will be getting. So if you want to go above 2.1v - use a POT and go a bit below 10k resistance and measure as you twist.
do the other mods too for vfsb/vmch/vcpu/vdrop to get a perfectly stable OC. I had to do all of them, used resistors for all, not POTs.
Could someone PLEASE tell me if there's a way to MOD VDIMM without loosing a warranty?
I've asked a few people - ideas: ground could be taken from a screw mounting the mobo, soldering on top of the leg, or using some clips - like those found in car's accumulators but of course smaller. No more ideas and I don't know if it'll work.
I'm sorry if it was already said in this thread. but I've got mobo and CPU for 3 days, and for next 2-6 days they will be still just getting dust -caused by extreme lack of time :( so forgive me for not searching. real no time here.
Thanx
Guys,
I plan to do the vdroop and vdimm mods to my p5b vannilla but I only have two 50k vr's to work with. That's fine for the vdroop which specifies a 50k vr but a 10 vr is recommended for the vdimm mod.
My question is can I use a 50k vr for the vdimm mod and how would I set this up?
I'm guessing that if I set the resistance to 50k this will seriously undervolt my mem and possibly lead to my pc not booting? So if this is the case can I set my 50k vr to 10k resistance before doing the mod and adjust down from there checking the volts with a dmm as I go?
Any help is much appreciated.
evil
50k is fine for vdimm mod, that's what I use, you will just max out at about 2.5-2.6v. A 10k just allows alot more voltage. When you add the trimpot, turn resistance to 50k the first time you boot and adjust from there. I found that 50k resistance gave me about 2.0v IIRC. I use an old 512 stick of ram for booting the first time when i do vmods so my expensive kits dont get fried if anything goes wrong. Might wanna do that too if you can. ;)Quote:
Originally Posted by evil_twin
@ Beton - Sorry man, vmods void warranty, no way around it.
Many thanks Eldonko,
That's what makes these forums great. I don't post much because most of the answers are there already but when you need assistance there is always someone who will take time out to help.
Happy New Year all.
evil
Just did a Vdimm mod with a 20k VR, works like a charm :D
gonna do vdroop and vmch mods next
I did the VDimm the VMCH and the VDrop mod. The vdimm and the vmch worked great and was able to OC my fsb to 515 stable from 450. The vdrop was also good as under load (1.7v in bios) went to 1.5v in windows which runs now at 1.6v in bios to 1.6v in windows. The thing is if i give it more like 1.65v in the bios im only getting about 1.6v in windows.
Any suggestions?
Hi guys, :toast:
any of you got a mouser part # for these trimmer? are bourns 3296 any good? i might have a few left from a power supply mod but i wont waste time searching for it :D are these any good?
:
http://www.mouser.com/search/Product...-3296W-1-503LF
thanks
edit: reading the datasheet told me everything I had to know. Ordered a bunch of 10/20/50K Ohm . :)
Help needed!
Yesterday a did the vdimm an vdroop mod and during the vdroop doing I killed the smd part /near the ADP3198/
On the attached jpg it is signed R3. This is actually not a SMD resistor it is a SMD capacitor.
I can't to use the damaged one. Possible to change it, but I dont know its real value.
If should be someone who knows the correct value /volts, capacity/ pls send it me in email. Thx in advance!
http://kepfeltoltes.hu/view/070108/v...toltes.hu_.jpg
Quote:
Originally Posted by bull pull
I used cermet trimmers. Its power is 0,5W too. I think yours choice will be good.
i didn't got any measure on the vdimm read....someone have a clue??
(EDIT)forget it...just toutchy to touch the spot
Did the Vdimm mod (again), now I can get about 2.3V easily.
Now I'm ready for the VFSB, so before the mod, I have to set the VFSB to the lowest in BIOS, right?
What does MCH do? Is it chipset's voltage? Or southbrige's?
NoRogeR How much FSB gain you have since you've done the Vdimm mod? How much voltage you've set in BIOS to reach 3,2GHz?
MCH = Northbridge, ICH = Southbridge
460FSB before Vdimm mod (stable), 470FSB after vdimm stable, 480FSB no boot.
You mean Vcore or Vdimm? Vcore: 1,4V, Vdimm: 2,1VQuote:
Originally Posted by Vivio
wow, now Im really confused. If MCH is northbridge, so whats VFSB? To what part I will increase voltage?Quote:
Originally Posted by Vivio
bump
FSB = Fronst Side Bus. Now guess what VFSB is.
Just a quick note to say thankyou to all the info that has been posted here you guys are very knowledgable it still amazes me that if there a way you usually find it! anyway here is what my P5B did after your mods:)
http://img.photobucket.com/albums/v7...w/sub11sec.jpg
will try 32mpi later
Nice one ;)
4,7GHz with only 1,138V? Cool!
What memory and how much voltage you've set for them. And of course if you can provide the rest of the parameters.
Water cooling?
cpuz doesnt report vcore correctly, and 4.7g takes alot more vcore than that no matter what the cooling. :)
I wish 1.138, Its at 1.74v on phase cooling GSKILL HZ's 6400Quote:
Originally Posted by Vivio
i recently purchased a p5b-e. can somebody confirm that these mods work for my mobo? are there any pencil mods?
Anyone have any information on the neighboring resistors? I'm expecting a p5b soon and am looking into pencil mods to raise to static amount. If it's not known yet, could someone provide background on understanding how to follow the neighboring resistors to determine what I might need to trial and error?
All I'm trying to aim for is this:
I figure since in bios, there's control for vdimm +0.3v over 1.8v for 2.1v, if I shade a resistor such that the baseline becomes 2.1v, I'd be happy with it.
As for vdroop, it looks like I could just shade until the desired resistance is measured across, and it should be eliminated, just the same, correct?
Same question applies for vmch. I'm imagining that 1.55v vmch should be sufficient for getting up to 500fsb sanely? And I understand new bios allows vfsb up to 1.45v anyway, so it should be fine there I'd imagine?
Can't wait to jump ship from ds3.
edit: Also, any ballpark resistance I'd want to aim for for the vdroop mod that seems to be most on target in terms of removing droop and maintaining set vcore?
Just wanted to post an update now that I have the board. My p5b vanilla came with the ability to scale vdimm up to 2.45v!! Guess this means no vdimm mod needed for me :). Droop and drop is horrid though. 1.40v set results in 1.35v idle and 1.30v load. Good lord. Then again, the ds3 I had wasn't too much better. 1.375v set results in 1.328v idle and 1.296-312v load.
edit: damn. looks like any setting above 2.1v in bios is not real. I'll post back when I get a new battery for my dmm, but it might be going back to 1.8v or something.