Holst need help soltek nf3 250gb vmod

[Stinger]

Holst or any1 else I need some help here please to figure out an vdim mod for my new soltek eq3801 barebone.
The board is an soltek SL-B9A-FGR nf3 250gb
http://www.soltek-computer.de/soltek/product/qbic.php?isbn_st=SL-B9A-FGR&qisbn_st=EQ3801
and I'v located an LM339 http://www.fairchildsemi.com/ds/LM/LM339.pdf
near the dimm socket. and I have messure it on the different mem volt (2.6, 2.7, 2.8) and the only pin that changes its volt is pin 14 (Out3)
at 2.6v my mm shows 4,16v on pin 14
at 2.7v my mm shows 4.30v on pin 14
at 2.8v my mm shows 4.45v on pin 14
Does any1 have an clue witch on i should solder? can pin3 and pin9 be a good ide or is it pin9 and pin12 or am I not even close?

[Holst]

Im not sure your quite in the right place there...
I dont quite understand how that can regulate Vdimm on its own (ove never seen one of those before)

Can you get a higher res pic of the board so I can take a look.

[Stinger]

Here is a picture of the board not the best my camera cant do better or maby its me. ;-)

[Holst]

The ritchtek chip handles VBT and such.
So I think the Vdimm is produced by a simple Vreg taking 3.3v and turning it into 2.5v.

Can you find out what the chip ive circled in red is, and what voltages are on its pins? (I suspect 3.3 and 2.5v) can you also see if the SMT resistors above and below that chip are traced onto its pins. A closeup would help me out.

[Stinger]

That chip is a P3056ls and the volt is from up to down 2,85v, (This one 3,26v is not connected to the mb), 4,42v and there are 3 or 4 smd above and under the chip, picture of it wasnt to good I'll try to take another one. The lower leg of P3056sl is connected to the upper leg of some little black 3 legged thing with the text 431M on it. and then to smd and then to pin 16 of LM339

[Stinger]

here are a bad picture damn camera

[Fisk]

Macro ?? :stick:

[macci]

Whats the resistance from pin8 of 339 to GND?

[Stinger]

I'll check that when I get home

[Stinger]

Macci the resistance on pin 4, 6 and 8 is 348 ohm pin 10 is nothing.

When the pc is turned on these are the voltage on the LM339 legs:

1. 12.12v_______14. (2.6v=4.16), (2.7v=4.30v), (2.8v=4,45)
2. 12.12v_______13. 0.03v
3. 5.06v________12. 0.03v
4. 2,55v________11. 0.03v
5. 5,12v________10. 0,03v
6. 2,55v_________9. 3.33v
7. 3,42v_________8. 2,55v

[macci]

5-10k VR from 8 to GND might work there. If you have located the Vdimm measurement point its rather risk-free operation to test if the Vdimm goes up when resistance from 8 to GND is lowered.
Power up the board without RAM, video or CPU...

[Stinger]

Macci I tried that but nothing happened the org recistance of pin 8 was 348ohm I used a 20k vr set at 10k for start and I turned the recistance all the way down to the lowest the vr could reach 400ohm shall I get another one that manage down to 0 ohm? I'v attached a bad drawing that have some recistance values.

[Stinger]

Sorry forgot to attach the 4 but its between the legs on the 431m thats on the same side

[Stinger]

Please common guys someone must have an idea what to do

[Hell-Fire]

I am with Macci.

Looking it over as best I could tell, the VR would be between pin #8 and any GND.

Do a connectivity test between pin #8 and the other components around it to see what it is tied to.

It is a possibility that the Vdimm overvolts when compared to the biso setting. Set Vdimm to low value and reboot...get back into bios on reboot and then check that FET to see how close you are to the bios setting. BTW, does the bios show you the Vdimm reading?

Going by your picture, the top leg of the FET is giving us the Vdimm. So, the best way to find out what pin of the Vreg is handling it, grab your DMM and hold one probe to the FET leg where Vdimm is read, then start probing the Vreg to find out what pins it is tied to. You will here a beep from the DMM once you have found the correct pin. Or, you can also do the same test and use the FET leg and start probing each side of the nearby SMD resistors.

Let me know if you follow what I am saying.

[Stinger]

Thanks for answering Hell-fire and yes its overvolts .3 messuring the upper leg to lm339 gives:
pin 14=3.80kohm
pin13=nothing
pin12=0.09kohm
pin11=nothing
pin10=nothing
pin9=nothing
pin8=0,44kohm
Th resistor and their values under the fet is attached with a paint picture

[Hell-Fire]

Are you saying that if you take a resistance between the top leg of the FET and the pins of LM339, those are the values you are getting??

And by nothing do you mean no reading at all, or 0.0 ohms?

[Stinger]

here are the values and they shows the resistors that are on my other paint picture a couple of posts up

[Stinger]

1. Yes
2. nothing=no reading at all

[Stinger]

I had 387ohm from pin 8 to gnd and when I tested a VR from pin 8 to gnd I started at 10k and turned my way down and got stuck at 440ohm I didnt get lower with it shall I test it again with a vr tha goes down to 0.0ohm or isnt it neccesary? the strange thing is that I had 348ohm on pin 4,6 and 8 EDIT it did go all the way down to 0.0ohm VR between pin8 and gnd doesnt work

[Stinger]

Pin9 (in3+) is connected to the left side of resistor 5 showed a few posts upp on the paint picture and resistor 5=34.6kohm if it would help

[Hell-Fire]

Well, if you have a resistance of 387ohm between #8 and GND before adding the VR, then after adding the VR, the resistance should be less not more. Unless you are saying that the VR itself got stuck at 440ohms...and you checked the resistance of the VR after removing not with it still soldered in place.

You should be getting a lower resistance after after adding the VR which would increase the voltage.

[Stinger]

I edit it a couple of post upp the vr went all the way down to 0,0 and nothing happened with vdim. I was looking around and found this thread where Mickeymouse (or some1 else) modded vdim on a chaintech nf3 http://www.xtremesystems.org/forums/showthread.php?s=&threadid=20351
The vreg on that board is lm2904 http://www.fairchildsemi.com/ds/LM/LM2904.pdf and he connected a 50k VR between pin5(in2+) and pin 8 (Vcc) Can I do the same? connect a 50k between pin9 (in3+) and pin3 (Vcc)

[Hell-Fire]

I dont think it would hurt to give that a try in fact.

[Stinger]

I'm to stupid for this, volt stays att std settings no matter what I do.

[SmokeyTheBandit]

The VDimm mod is 20 k @ pin 6 @ RT9137A (99 % sure)
The Vcore mod is 50 k @ pin 10 @ ISL6559 (99 % sure)

The LM339 is controlling the Vldt and Vagp and a few more but cant remember :D :P

Sounds very familiar with the chips i vmodded on my EPoX 8KDA3+.

for pictures : http://www.xtremesystems.org/forums/showthread.php?s=&threadid=36041

[Stinger]

So the RT9137A controls the lm339 with other words?? maby that explains why vdim remains the same what ever I do with the lm339 vdim doesnt change. Would I be happy if this works :toast:

[SmokeyTheBandit]

Originally posted by Stinger
So the RT9137A controls the lm339 with other words?? maby that explains why vdim remains the same what ever I do with the lm339 vdim doesnt change. Would I be happy if this works :toast:

Im sure about the Vcore mod ! :)

The Vcore mod is 50 k @ pin 10 @ ISL6559
www.intersil.com/data/fn/fn9084.pdf (FB = Pin 10 Alright !! :D )

Are you 100% sure its an RT9137A because i cant find anything on that one.

I can find allot of info about an RT9173A though ....
http://www.richtek.com.tw/Product/Docs/DS9173A-11%281%29.pdf

[Stinger]

Yes I'v allready done the vcore mod its the damn vdim thats the problem.

[Stinger]

Here is pdf of RT9173a http://www.richtek-ic.com.tw/Application/Docs/DS9173A-11%283%29.pdf

The rt9173A have the following values.

At 2.6v set in bios:
pin1=2,63v same as in bios monitor
pin2=gnd
pin3=2,63v
pin4=1,31v
pin5=1,33v

At 2.7v set in bios:
pin1=2,73v same as in bios monitor
pin2=gnd
pin3=2,73v
pin4=1,36v
pin5=1,39v

At 2.8v set in bios:
pin1=2,83v same as in bios monitor
pin2=gnd
pin3=2,83v
pin4=1,41v
pin5=1,43v

[hipro5]

The rt9173A is ONLY to provide the VTT voltage and nothing more than that..... ;)

[hipro5]

Try to see where the "RIGHT" leg of the output Mos-Fet for the Vmem(Vdimm) goes.....If it goes directly to LM339 IC try to measure on which leg of it goes and IF it goes there through a resistor or not.....

[Stinger]

The P3056ls legs have these values:
The upper leg 2,65v, 2.75v, 2,85v (When vdim in bios are 2,6v, 2.7v, 2.8v)
The middle leg 3.26v (not connected to the mb),
The lower leg 4.16v, 4.30v, 4,45v (When vdim in bios are set to 2,6v, 2.7v, 2.8v) The lower leg is connected to some resitors-->431m--->pin 14 of lm339 show in a picture a couple of posts up.

I'll messure the upper leg and see where it is connected
Upper leg=right?

[hipro5]

Originally posted by Stinger
The P3056ls legs have these values:
The upper leg 2,65v, 2.75v, 2,85v (When vdim in bios are 2,6v, 2.7v, 2.8v)
The middle leg 3.26v (not connected to the mb),
The lower leg 4.16v, 4.30v, 4,45v (When vdim in bios are set to 2,6v, 2.7v, 2.8v) The lower leg is connected to some resitors-->431m--->pin 14 of lm339 show in a picture a couple of posts up.

I'll messure the upper leg and see where it is connected
Upper leg=right?

Yes.where is it connected?......

[Riska]

Stinger do you want some hi res pic of the mobo?
There is also some chips on the bottom on the mobo! right under the mem slots!

[Riska]

http://frip.dk/riska/mine%20pics%207541.JPG

Here is one!

[Riska]

http://www.monarchcomputer.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=M&Product_Code=100839&Category_Code=ps-enermax

Stinger i have bought this and it is great for the 3801 soltek barebone! i am about to mod i for higer rails!!

And i heard taht the new soltek 3401pro have an 300watt psu!

[Stinger]

Nice Riska thank you very much maby it will help solve this on.
I'v done some messuring. Here are the values from the upper leg of p3056ls to lm339

1. 1.30k-------14. 3.81k
2. 1.30k-------13. ----
3. 0.22k-------12 0.09k
4. 0.44k-------11. ----
5. 2.35k-------10. ----
6. 0.44k--------9. -----
7. 0.22k--------8. 0.44k

And here is from upper leg of pl3056ls to rt9173a
pin1. 0.00-0.01 ohm
pin2. 92 ohm
pin3. 0.00-0.01ohm
pin 4. 74 ohm
pin5. 606ohm

[Riska]

Have you seen there is also some chips under the mobo?

[Stinger]

What??? no I have not looked there can you take a picture of it?

[Riska]

I am emailing you right now!

[Riska]

You have mail!

[Stinger]

Thank you riska for the pictures I'll post them here soon. there is an hip6602 on the backside of the bord

[Riska]

Jep i saw that! thats wy i took pics of it!
Is ther any other pics you want of it!
I have found the system temp probe on the mobo also!

[Riska]

There is some mosfets also on the back side!

[Riska]

I will go to sleep i am lokking on it to morrow!

[Stinger]

here is the a picture from Riska

[Stinger]

Here is another

[Stinger]

And here is the backside of mb

[Hell-Fire]

This board has an odd design if you ask me.

They have the ISL6559CB onboard to control Vcore, which is to far away from the socket imho. They also have on, the back of the board, the HIP6602 which is also a Vcore Regulator..??

Anyway, Stinger, can you read the markings on the IC to the left of the FET P3056LS??

Also, I can see that you noticed Pin #14 is hitting a fixed resistor with a SMD capacitor soldered on across it....then hits the transitor (431M), then to bottom leg of FET. In this case, modding Pin #8 may do the job as that pin is the error amplifier for #14.

Its interesting the the RT9173 also shows the Vdimm on Pin #1...thus modding #6 would work as its the error amplifier....but then again the RT9173 is strictly a Vbt Vreg.

Can you expand the area above the FET so we can get a look at what top leg is connected to?

[Stinger]

"Its interesting the the LM339 also shows the Vdimm on Pin #1..."?????? What do you mean I have 12v on pin 1 (lm339).
This is the only picture I have, Riska!! can you take some more pictures please?
"modding Pin #8 may do the job" I'v tried that and nothing happened

[Hell-Fire]

Thats my mistake...had my Vregs mixed up...edited my post.

In the pic above, what are the markings on the 8 legged IC to the right of the FET?? It has "U4" under it....4 legs per side.

[Stinger]

Pictures comming, if we go back to pin14 of lm339 for a while. at 2,6v pin14 has 4,16v at 2,7v pin14 has 4,30v and at 2,8v pin14 has 4.45v. Pin14 is out3 what controls pin14? obviosly not pin8 because nothing happened when I attached a VR to it.

[Riska]

I have mailed you stinger whit pics!

[Stinger]

Hell-fire--> the chip next to FET have this text:
4609
BD3z16 or BD3216
theres another little higher and it is an hip66 I'v attached a new picture that Riska took.

[hipro5]

What's the value of R20 ???

[Stinger]

here are some values

[hipro5]

Is the left side of the R20 (as shown in the picture) connected to one leg of LM339 pin 10 or pin 11 ??? ..."0 Ohms"....

[Stinger]

no its connected to the transistor (431M) and the resistor that is connected to leg 12 of lm339

[Stinger]

common guys dont drop this now

[Stinger]

Well Riska I tried but I dont think theres gono be a voltmod this thread is going to die.

[Hell-Fire]

Interesting that this board has a Vreg onboard that was for older P3s and Athlon cpus (HIP6601BCB).

Especially when they already have the much more robust ISL6559 onboard to handle the Vcore regulation.

Have you done the connectivity test to find out what is tied to the FET leg reading the Vdimm??

[Stinger]

There are some values on page 2 from the upper leg of FET to lm339 and rt9173a. Can it be that the HIP vreg has something to do with vdim?

[Hell-Fire]

Originally posted by Stinger
There are some values on page 2 from the upper leg of FET to lm339 and rt9173a. Can it be that the HIP vreg has something to do with vdim?

Yes, I saw those.

The upper leg of the FET is reading the Vdimm...and I saw that the RT9173 is also reading the Vdimm and Vtt voltages as well.

The lower leg of the FET is tracking at 0.15v for every change in the Vdimm.

I have run into ICs in the past that the data sheets were showing was affecting Vcore, but that another IC was actually controlling them. So modding the IC that had Vcore regulation did nothing, but modding the IC controling those Vregs did the trick. We may have the same thing here.

I would give modding either the HIP chip on the front OR back a try and see what we get. I would think the ISL6559 is more than up for the task and doesnt require other ICs in the loop.

Whats the other markings on the chip marked GD75332?? If I recall thats a Texas Instruments chip....and is prob responsible for something other than Vdimm.

I take it there is nothing being hidden by your cpu heatsink.

[Stinger]

No nothing is hidden by my heatsink, cd75232 is a RS-232-D interface chip wonder if it could be the hip6602 cos its not a regular voltreg like hip6301 its an high frequency two power channel mosfet driver that work together with isl or hip6301.

[Hell-Fire]

Well, took a better look at the data sheets for the HIP6601 and HIP6602 that are onboard your mobo.

Both are being controlled via the ISL6559 IC versus linking them via a HIP630x Vreg.

We have to look elsewhere.

To bad your board does not have a Winbond IC on it like the AOpen AK89 I am working on. I got Winbond to send me the data sheet for the W83304D IC and I think I can figure the Vdimm mod out using it.

Hell, at this point since Pin #14 is moving along as the Vdimm increase...try modding that thing...could be worth a shot...may as well since we have hit the proverbial wall.

Still waiting on where upper FET leg reading Vdimm is connected elseshere on the board. If we can find a resistor in the same path it may be as simple as removing that resistor and tying a VR between the solder pads and the upper FET leg.

[Riska]

Would other pics of the mobo help?
There is a texas instrument chip at the other end of the dimm sockets!
Just say the word and i wil upload some pics!

[Stinger]

please do

[Riska]

What would you like to se?

[Stinger]

high res resistorpic around lm339,rt9173a, p3056

[Riska]

I will look if i have more
here is one of the RT1 temp probe

[Riska]

Here is one not so god.. i will take some mor close ups tomorow ok?

[Hell-Fire]

Ignore that Texas In IC....it controls the ports and what not.

You STILL havent said what upper FET leg is connected to.

[Stinger]

When messuring from the upper leg of FET I have 0,00 ohm on those marked on the pic

[Riska]

can this do it is conected like tjis!

[Hell-Fire]

Wait...that pic is not arranged as the other pic was when he stated he got the Vdimm reading from.

In your pic, is the Vdimm reading coming from the bottom leg...the one without the green line to it. Dimm 2 is printed in front of it.

[Riska]

I cant rember and i cant chek it because i am not home but i will chek when i get home!

[Stinger]

Riska rotate the pic 180 deg

[Riska]

ok here.

[Riska]

Sorry for the placing of the pic

[Stinger]

hehe I'll paint the same on my and you delete yours Riska ok?

[Riska]

When i get home i wil take som better pics if i can can you say presice where i should zome in at?

[Riska]

ok

[Hell-Fire]

The main thing, atleast imho, is to find out what else is connected to the FET leg that reads Vdimm.

Point those things out and take a pic centering around that FET.

[Stinger]

those on the pic that reed 0,00 ohm reads vdimvolt 2,83v. right side of R20 have 2,83v (left side of r20 reads 2,54v) and the single dot next to lm339 reeds 2,83v

[Hell-Fire]

Ok, I am still wanting to know if those 0 Ohm readings are between the FET leg reading Vdimm or the the other leg.

Which FET leg using your last pic where you painted is the one reading Vdimm??

Regardless, I am thinking a VR between left side of R20 and GND will be the trick.

Or, a VR between the solder pad reading Vdimm and the FET leg reading Vdimm.

Please let me know which FET leg is reading Vdimm and if thats the leg you used to get the zero ohm readings.

Think we are pretty close to figuring this out, but need the simple questions answered first.

[Stinger]

those 0 Ohm readings are between the FET leg reading Vdimm
My latest pic on page3 is reading vdim at the upper leg the other leg is connected to 431m and resistor and pin14 (lm339)
"VR between left side of R20 and GND will be the trick" do you mean the leftside reading 2.54v if you look at the pic at page3?

[Hell-Fire]

I was looking at the other pic that Riska had turned 180 degrees.

Thats why I wanted to be certain we on the same idea man.

I take it that R20 has a value and is not a 0 ohm resistor bridging a gap. Could you please post the value of R20.

Going with your pic, then we would go to the left side of R20 (reads 2.54v) to a GND with a VR.

I am assuming a 1K or less VR will do the trick.

I am getting some sleep...will check this thread later in the afternoon.

[Stinger]

R20 left side is connected to the lower leg of 431m look in the pic

[Hell-Fire]

S0, the lower transistor leg is connected to the side of R20 reading 2.54v? Makes sense as all a transistor is for is to conrtol the flow/direction of electricity. Same as with a Mosfet, which is actually a transistor as well.

Can you do a connectivity test to see if a pin on LM339 is connected to the bottom transistor leg sir?

Is pin #12 coming straight across and hitting that resistor that has the SMD capacitor piggy backing on it and then hitting lower leg of 431M on its way to R20? Hard to tell with that pic.

But in any case, here is what I think it is doing.

Pin #14 is throwing out over 4v (exact value depends on Vdimm setting in bios) that hits the right end of R30 where the SMD capacitor is piggy backing. That voltage goes thru the SMD cap and into R22 and across to bottom leg of 431M. Then to R20. The fact that it hits 431M means nothing other than thats the path it has to take as it goes to R20 without passing through the transistor.

Out of morbid curiousity, what is the voltage reading on single 431M leg and the legs on the capacitor across from it??

[K32A]

Come on guys... You need to solve this problem... I want vmods on mine too :toast:

[Riska]

Stinger have found out of it i think. he Pmed me and told me, he have got 3.04 volt to his mem! i am waiting to hear how he found out of it?

[K32A]

Thats sound very nice...

I'm sick and tired of no OC oppotunities...

[Stinger]

Hell-fire suggested a spot to test and the volt raised a bit but it is fixed at around 3v not variable We'll continue to investigate this. I will not give up on this.

[K32A]

No, dont give up - 'Cause we need that vmod :p:

[Stinger]

This might be our solution http://www.ocztechnology.com/products/accessories/OCZ_DDR_Booster_Voltage_Diagnostic_Device

[K32A]

*lol* OKay :D Isnt there a mod that works or what?

[Riska]

I wont help because we only have 2 dimm slotts! and i need minimum 1gig of ram!

[K32A]

Thats right Riska... I have 2x256MB blocks, and i cant live with only 256MB of RAM :(

[Hell-Fire]

BTW, everyone remember that when you are breaking ground on new mods.....sometimes unfortuante things happen.

Just because there is an option to try, does not mean it will not cause bad things to happen.

On that note....Stinger fire me a PM as I have a question and need a reading from you something.

[Riska]

Have you talked to stinger?

[Stinger]

Do we have a A7v scenario here?

[Riska]

It could look like it!

[K32A]

Guys... Any good news or what?? :shrug:

[Stinger]

No I guess this thread will die soon cos its hard for thoose who knows this stuff to guess when they dont have the board to look at

[K32A]

Yeah... But if any one solve this "problem", then u must post in this thread or make a new, or just do something to inform us :)

[Hell-Fire]

Yeh, its pretty hard to continue on a path when you have to re-read most of the thread to see what has been tried and what didnt work.

Takes far less time when you have the board to work with.

That being said, this AOpen I have right now is driving me nuts...lol.

[K32A]

I just hope that Stinger or Riska, or another "geek" will get this vdimm mod working... My BH-5 is screaming after more juice and so do my A64 :)

[Riska]

I am still trying but havent have any luck so far!

[K32A]

I'd be very happy of someone got the answer/solution about this... I'll go googling :)

Is almost all of the mobo's in Solteks barebone identic ? If we could find a giude to vdimm mod on another of Soltek mobos, would'nt that help ?

[SlackeR]

well.. for the SL-75FRN2 you'll need another "stabilization cirquit":
http://forums.pcper.com/showthread.php?t=297579

EDIT: but of course it is not for the qbics, might get ya on track, though?

[K32A]

Well, i was thinking that maybe the vdimm mod could nearly be the same on the mobo from a Soltek Qbic AmdXP or am i totaly wrong ?

[Riska]

Is there any news?
I have just found out that the beta bios have a pci lock working so now i will love to have som more power to my ram i kan get it stable at 285mhzx8.5 whit htt at x3 and mem divider at 133mhz

[Riska]

Is this thread totally dead??

[Hell-Fire]

Let me look over the thread again later tonight Riska and I will see what I can come up with.

[Riska]

That will be great!

[Stinger]

Now I'v ordered an Ocz ddr booster I hope it will work on the soltek mb.

[HKPolice]

Nothing new?? :(

[Stinger]

Here are the news. The ddr booster works I can get up to 3.85v it is hard to get it in place but after some modification it works the only thing missing now is a enermax psu eg285st-vb but I cant get them here in Sweden and newegg doesnt ship to sweden damnit.

[Riska]

Did you get any higher fsb whit the higher vmem??

[Stinger]

yes did some 277mhz 1:1 testing today managed to get 30942 3dm2k1 and 33 sek superpi and high 46 sek hexus pifast so I'm very happy not bad for a barebone with only aircooling. If someone could help me out and buy a Enermax 270w matx psu (eg285st-vb) and send it to Sweden I would be even more happy.

[Riska]

We have to look at it again!!
There must be a way to get it right!
I have to have both my ram slots for my ram so the ddr bosster is no good!
just say what pics you need and what messurment you what!
Please come on it must be possible!

[Riska]

Come on guys issent there some one ho can help??

[Holst]

Hi all.

Sorry ive not been around for ages... I tend to post at "the place that shall not be named" although rarely even there at the moment.

Can somebody post a few links of what people have worked out so far and I may come back tomight after ive been to the pub and take a look.

[GomerPyle]

Riska if Holst dont come up with something I think I can post a picture of a mod i next week. Need to test it first when I've got the time though.

[Stinger]

nice, thats the spirit I was happy for a while but its not funny to have only 1 memslot left when the booster is in place

[Riska]

You just say what pics you want and i will take them and upload them!!

[Riska]

Come on is there some one out there ho can help!!!

[Skeet]

Help with what, the vdimm mod?

[Riska]

Yes!

[Riska]

Gomerpyle have you come up whit some thing?

[Riska]

Hallo gomer??