Asus P5B Vanilla (non dlx!) vcore+dimm needed

[ziddey]

Update one more time. This time I did some measurements with a dmm. I'm not done with testing yet but probably won't be able to get to more until tomorrow.

But my preliminary results show these:

Set Actual
2.10 2.12
2.15 2.12
2.25 2.37
2.30 2.37

haven't tested anything else out yet but it does look like there is the ability to exceed 2.1v set. However, with both 2.25v and 2.30v, I can't even post as high as I can while on 2.10v. I'm assuming this may be because my ram (either powerchip or hynix) does not like higher voltages at all.

That said, even when I get my d9's back from rma, I wouldn't feel comfortable running them at 2.37v, and there's no settable option between 2.15v (2.12v actual) and 2.25v (2.37v actual).

Guess I'll be exploring things with my pencil again tomorrow. FWIW, there's 6 smd capacitors in a row right under the voltage generator. I shaded the left one (towards pcie) with a pencil to all hell but it didn't make the slightest of impact on vdimm.



Also, not sure if it was mentioned (I recall it was since something made me feel like I could do it), I did the same vdroop mod for p5b deluxe on my vanilla, although I used pencil. I shaded it down from 130k ohm to 5k ohm and now am seeing absolutely gorgeous looking vcores. vdrop and vdroop are pretty much nonexistant.

[ziddey]

Alright, it's update time. Here's a picture:

Indicated with green is one to shade with pencil. Note that this is for 1.04g, and I've seen different pictures for earlier revisions. I've found that shading with #2 to the max wasn't enough to raise vdimm baseline above 1.99v. I had to use a hybrid of copper ink and graphite to bring baseline to 2.18v. I've also been able to do 2.34v but that was too high of a base.

[tuanming]

Where do i shade/pencil for a rev. 1.03G and how many stroke? Mine has A015, your is A011 and the area near where you suppose to pencil look a little different from your 1.04G!

[ziddey]

do you have a multimeter yet?

[tuanming]

No, i don't have any money on me... But do i really need a multimeter just to shade/pencil on one of the resistor?

[ziddey]

if you don't mind screwing up and having to buy new ram and a new motherboard, then no you don't need a dmm.

it's really more of a question of which resistor to shade more than anything else. That said, there can still be variations in 1.03g and 1.04g, but from what I've found with 1.04g, maximum shading with #2 only yields 1.99vdimm actual. of course this can't be said of all boards, and not without a larger sample can we make ventures about the population.

at the very least, why don't you take a picture of the area in question.

[tuanming]

Well, here's how my rev. 1.03g look different from the one on the first page.

[ziddey]

If you wanted to take a risk, here's what I'd do.

Set vdimm in bios to 1.8v before continuing, and start with settings that'll boot at 1.8v. Then, find the max that you can do stably with 1.8v.

Then,
Shade that in fully with pencil. Blow off extra. Boot and see how much further you can go.

It looks like one of the smd components is actually a capacitor instead of a resistor, but don't quote me on that.

Also, since I've told you many many times to get a dmm, you do this at 100% your own risk and if you blow your up, don't blame anyone but yourself.

That said, in 1.04g, the 2 smd resistors on the right end. The one I marked in green raises vdimm. The one farthest right lowers vdimm. So it could have that effect as well when you shade, and find that you can't overclock as much even on 1.8v.


If you are going to do this, then I wish you god speed.

[tuanming]

When shade how much pressure or force should i use and how many stroke?... PLEASE WISH ME LUCK MAN!!! lol

[ziddey]

take a pencil and go nuts. shade to no tomorrow. completely cover the package of the resistor and the metal endpoints. make sure you blow a bunch of times (I'd say canned air but you probably don't have that, so use your mouth).

you can blow it clean, then shade more, then blow again. you will hit a limit pretty quickly with #2 pencil in terms of how much you can reduce resistance.

edit again: i hold no liability

edit: good luck

[ziddey]

lol are you alive?

[tuanming]

Yeah...somehow manage to live through it... LOL. My heart almost jump out man! The first error i got was Error loading OS! That was my fault for switching the sata cable cuz it was in the way. So now im at stock with 1.80v..

Now what? Overclock to 515 fsb with 2.1v or 2.0v? How do i know it work or not if i have successfully did a vdimm mod?

[ziddey]

man you're going to get me banned from XS for giving questionable advice

[wittekakker]

Red somewhere that someone (sounds fishy huh) was asking about the SMD capacitors near the ADP chip used for Vcore voltage. Looking at the Vdroop mod, there are 2 capacitors, if you loose one of those, your bord should still be working. You can replace it with a 2nF capacitor if you lost both

[ziddey]

who are you replying to?

[wittekakker]

who are you replying to?

I dunno. The person who was asking about those capacitors. There are 2 big Vanilla threads and yesterday it happended I came across that question in one of those 2 threads. The chanche is small he'll ever read it though

[tuanming]

I did the vdimm mod and it works! I can finally do 500 fsb with 4-4-4-12 timing... Is 10k enough for VMCH and VFSB or do i need a 20k multi turn trimmer/cermet/resistor for both of them?

[ziddey]

whoa, nice! sorry i didn't have a vote of confidence. what vdimm you running now?

congrats, really! i owe you an apology

[tuanming]

2.1v in bios and my multimeter read 2.32v but i screw it to 2.30v . Actually, i have to thank you ziddey for answering some noobish questions xD. Tomorrow I will do the rest of the mods and need to get other resistors for them. Does all 20k, 50k, and 100k resistors have muliturn, cause i think i just fall in love with the screw .

Finally, I can run 4-4-4-12-4-42-3-11-7-13 timing on 505 fsb. I know it may seem like nothing to you guys...but for me it is really something

[ziddey]

nice! with those d9gmh, you should be able to do better timings. try 4-4-4-10-4-25 and 2-9-4-11 for the last part, and if that doesn't work, 3-11-5-13.

Also, you can now experiment with turning on static read to fast. it should get you a little more memory performance.

careful with 2.3v though. you should get a fan to blow over the memory if you haven't done so already.


also, in that picture, you only have one stick installed eh?

[tuanming]

hehe, yeah. I don't want to lose both stick if something went wrong. Okay, now i'll go try out the better timing.

[Thasp]

If you wanted to take a risk, here's what I'd do.

Set vdimm in bios to 1.8v before continuing, and start with settings that'll boot at 1.8v. Then, find the max that you can do stably with 1.8v.

Then,
Shade that in fully with pencil. Blow off extra. Boot and see how much further you can go.

It looks like one of the smd components is actually a capacitor instead of a resistor, but don't quote me on that.

Also, since I've told you many many times to get a dmm, you do this at 100% your own risk and if you blow your up, don't blame anyone but yourself.

That said, in 1.04g, the 2 smd resistors on the right end. The one I marked in green raises vdimm. The one farthest right lowers vdimm. So it could have that effect as well when you shade, and find that you can't overclock as much even on 1.8v.


If you are going to do this, then I wish you god speed.

Could you possibly post a bigger picture of that so I can see where it is on the board? The solder mods all are well documented, but the pencil vdroop and vdimm mods I find never seem to show where exactly on the board to find what gets penciled in. I get 1.488v at 1.65v, so I would like to get to doing the pencil mod using a stick of ram and cpu I don't use anymore for test purposes. I also notice the deluxe, p5wdh, and -e models have 100s more results in search than the plain ol' p5b

Thanks!

[ziddey]

You quoted a picture showing a possible faulty vdimm pencil mod (never confirmed). However, http://www.wittekakker.be/projects/p5b/index.html for a general guide. should have pencil vdroop in there too.

where it says to connect a 50k resistor, just use pencil and shade it as much as you can. use your eyes and you will find it

[Thasp]

Ok, so this would be it?

http://www.wittekakker.be/projects/p5b/vdroop1.jpg

Should this work on every revision, or just certain revisions? I'm not sure how to tell what revision my board is. That looks the exact same as my board so far. Also, on measuring the CPU vcore, all I do is take both the black/red spikes of the multimeter and put them on the coil near the CPU, both on the same coil? It's a pretty accurate DMM so I'd rather use that then the crap in the BIOS.

Sorry, I'm a bit new to this, but I'm not new to electronics or doing crazy stuff for overclocking, so I would like to try this, I just want to make sure I'm somewhere close to correct before I go messing with it - I perfectly understand any damage to the board is my responsibility, and that there are no guarantees.

I just tested with a lead pencil and my multimeter, I can get as little as 3K or as high as 200K depending on how much pencil I use, so I guess I will have to be careful. Is 50K the safe point to start at, or where it should end? I've read about some people going as low as 20K ohms for this modification.

Thanks again for all of your help!

[ziddey]

one to the coil, one to ground. just use the bios reading. I've found it to be pretty accurate.

I've personally shaded it down to 5k ohms and get gorgeous results..