If its not working with it connected you're connecting to the wrong spot probably.
Printable View
If its not working with it connected you're connecting to the wrong spot probably.
I tripple checked the spots. Even with a DMM. When i read the vdimm voltage it says about 3.3V but the board just won't boot.
hehehe :lol:
post ur modded board pic.. :)
mmm... if you connected like the pic it should work...
please compare also your points with the red-dot-pic here.
... or possibly you have an switched vrm onboard like this epox ?
http://www.xtremesystems.org/forums/...010#post441010
that red dot plz make it clearer... :lol: i cant see emm
really ... :confused: ... i will try.Quote:
Originally posted by tictac
that red dot plz make it clearer... :lol: i cant see emm
using here an tft eizo L365 on dvi... any pixel is perfect clear. :p:
and i upload the pic in gif, jpg killed the red color so much.
so, here the pic with bigger points...
hopefully better reading now. :)
ok thanx...
measure the point without it connected, should reflect what you have vdimm set to in bios +/- .1v
oh'man, sorry for the long time to update. :(Quote:
Originally posted by HKPolice
Plz post update for IS7!!
i have changed my mainrig and have now back again the is7-e for playing. :D
here the pics.
first pic is like the others, one of the three wire is enough for working, but more is better. :D
no opening, cutting, desoldering, simply connect...
pic #2 is vtt mod.
is functional-similar like ic7 ...
the blue marked tracer must be cutted between the both ends of resistor.
check again if the tracer truly open.
scratch blank the tracer and solder resistor on it, 5 or 10 ohm.
gray wires going to top side and connected to an vr 200 ohm.
http://www.rio71.de/forum/is7-e-3,3vdimm.jpg
http://www.rio71.de/forum/is7-e-vtt-mod.jpg
I have some questions about this mod witch i couldn’t find an answer to in this topic.
1. Do you need to solder a wire to each dimm slot or do all the dimm slots get raised voltage if you solder it to 1 ?
2. Can you still measure the vdimm at pin7 even if you dint use that pin for soldering ( you probably can but i just want to be sure).
have your board particular dimm-vrm for each dimm-slot ?... :DQuote:
1. Do you need to solder a wire to each dimm slot or do all the dimm slots get raised voltage if you solder it to 1 ?
2. Can you still measure the vdimm at pin7 even if you dint use that pin for soldering ( you probably can but i just want to be sure).
yes, all vdimm points raised...
i connect to this red-marked pin(s), which i can easyer connect... lots of choice
Quote:
all the marked pins should (original) be connected together and with pin7 too --> all vdimm.
i edited the red-dot-pic again.
add pin7.
all red-dots are also contact blades like pin7 on upper side.
RIO figured it out and measured 3.44V in PIN7, but no startup then....:( May be som kind of OVP?
mmm... or you killed the board before. :(
Nope it starts up without problems if I remove the mod.
Btw. its a Asus A8V s. 939 mobo...
is it possible that some mobos have overvolt protection of some kind ?
I did the mod on my shuttle AN35N and it worked great.
The only thing im "worried" about is that it doesnt track the vtt right on witch pin of the mem socket can u measure the vtt?
Jalmir - many that limit to 2.9v or less have OVP, especially the latest Asus 939 boards.
Hi guys...
Lot of good info in this thread...will help a lot of ppl reticent modding is own hardware.
Anyone here already tried the mod on a p4c800???
I made the normal vdimm in LM chip but i would like to test the mod that way to see if there's any difference...
Thks in advance m8's.
oh, this is'nt good news. :mad:Quote:
Jalmir - many that limit to 2.9v or less have OVP, especially the latest Asus 939 boards.
but... how it works ?
you can try make the wires longer and connect it together after post is complete. :D
(but try this not with running win, memtest86 is saver if crashed or unstable...)
... i mean, the ovp is also "away-modable"... should.. :D
p4c800, i think is like the p4p800, whats the big difference between board to board.. ;)
no pin for vtt. vtt is the memorybus termination. 0.5 x vdimmQuote:
I did the mod on my shuttle AN35N and it worked great.
The only thing im "worried" about is that it doesnt track the vtt right on witch pin of the mem socket can u measure the vtt?
you can find lots of little 4er resistor-arrays around the dimm-socket.
one side of the arrays are all connectet together with a bigger trace.
this is the vtt and measurepoint (to ground).
:confused:Quote:
Originally posted by STEvil
Jalmir - many that limit to 2.9v or less have OVP, especially the latest Asus 939 boards.
sorry for my lack of knowledge ... I realy don't know what OVP means ... found a lot of Office of Voluntary Programs on google tho! :D
... and here the pic..
...OverVoltageProtection
:toast:
:doh: ... of course! :brick:Quote:
Originally posted by Rio71
...OverVoltageProtection
:toast:
thx!
sorry for my question ... http://forum.hardware.fr/images/perso/airforceone.gif
Same place as p4p800...Quote:
Originally posted by Rio71
oh, this is'nt good news. :mad:
but... how it works ?
you can try make the wires longer and connect it together after post is complete. :D
(but try this not with running win, memtest86 is saver if crashed or unstable...)
... i mean, the ovp is also "away-modable"... should.. :D
p4c800, i think is like the p4p800, whats the big difference between board to board.. ;)
I made the question cuzz the "normal" vdimm mod on these two boards are the same but in different places on the pcb of the board...
Definitely the same method like the one posted before on the p4p800 pic????
Same place on p4c800?
THKS IN ADVANCE!
Maybe i'm getting confused i dunno but doing that mod on a p4c800 aren't we going to put extra 3,3v on the mem's, i'm saying that cuzz i don't see no one saying that is we need disable the circuit that feeds the mem's on this board...any info on this question would be great...
Thks m8's!
I think I have a theory on the Asus A8V socket 939 OVP. It may also be the chipset voltage that is raised along the vdimm.....!?
Some time ago I modded a Chaintech VNF3-250 and the chipset voltage went from 1.74V to 1.9xV when raising the voltage to vdimm to around 3.24V.....Could that not be a reason for the lock ups in win with more than 3.15V?
Could well be... but i dont remember any other users of the VNF3-250 reporting that same occurence?
Used the PIN4 and PIN8 to mod the vdimm. Well did not see it myself before, only by a coinsident (bad english). Only problem for me now is where to measure chipset voltage on the Asus A8V?
May some of you experts be able to help if I post a closeup of the mobo?
So I only have to solder 1 wire on the back of my motherboard from the points shown in your p4p800 picture, from atx 3.3v to the vdimm point you show? I guess I should remove the "normal" vdimm mod I did in the past. Should I worry about the old vdimm mosfet or just leave it alone? Will the vdimm reading be from the same mosfet as before or do I read it from the socket? I think I may do this tomorrow.
I think u'll only get the VIO voltage, In my K8NPRO it's like that, only the VIO voltage feeds the mems.Quote:
Originally posted by VoRtAn_MaDgE
Maybe i'm getting confused i dunno but doing that mod on a p4c800 aren't we going to put extra 3,3v on the mem's, i'm saying that cuzz i don't see no one saying that is we need disable the circuit that feeds the mem's on this board...any info on this question would be great...
Thks m8's!
hey VoRtAn_MaDgE, can you post an pic with the interesting area ? ;)
TyphooN, you want mod a p4p800 ?
only connect like the pic, thats all.
no removing... dimm-mod too..., the measuring-point you used is the same as bevor.
the fat red wire is needed, the longer smaller one is not needed, but helps a little little bit.
conclusion: only two solder points. :D
... of what ???Quote:
Originally posted by GomerPyle
Used the PIN4 and PIN8 to mod the vdimm.
Alright, that just makes it easier for me(not removing the old mod). So basically the vdimm will be the same or slightly lower as 3.3v correct? I won't need near as high a rail as I am using now(3.62 to keep 3.3 stable).
if your 3,3v actually 3,62v so the vdimm come close to 3,62v and 3,60v under mem-load, memtest86 #5
the success is depending of thikness of wire. use a fat as possible (massive wire).
Alright, I think I have some thick wires, from an old psu. Thanks for your help =]
I did this mod last night. It works awsome. I just wish I could turn down my 3.3v some more, the lowest I can get it to is 3.5, and I do not need that much vdimm for how fast I am running it. I hope it isn't bad for the ram.
BH-5 will take it with ease as long as you have some kind of fan blowing at them.
Crank up the fsb :D
I have thermaltake copper ramsinks on them, I don't see how I can have a fan blowing on them. I can't really push the crap out of my ram right now till I get a 3.0c or a 3.2c, but when I do I'll rape my ram lol.
hi,
here the mod for AOpen i855GMEm-LFS.
simply again, like the old scheme... sold the red wire to the points.. thats all.
vtt raising automatically. :)
http://www.rio71.de/forum/aopeni855-vdimm-mod.jpg
Does the 3.3v mod work on a DFI Infinity?
I think the Infinity draws its vdimm from the 5v rail doesnt ? So doing this mod then increasing the 3.3v rail wont make any difference right?
Nope, just vmod with a resistor...
I have a few questions.
How are you guys gettings 3.6 and above with your psu's, I have an antec with the pots that I can adjust but I can't get more that 3.33.
I did the mod on my MSI neo 2 and it works awesome...but I need more voltage, I am stuck at 250 fsb right now with 2,2,2,5 1:1 timings.
Did we ever figure out how to use the 5 volt rail? because my bh-5 is screaming for some 3.6+ volts
Thanks
Bryan
I think people have avoided doing the +5 for vmem on the boards because people have been saying high +3.3 or high vdimm kills A64.
The shuttle an5x used +5 for vdimm and i'm sure there are a couple others that do too which havent killed any cpu's yet without a vdimm mod... so somethings not quite right here. If I had a board and CPU to potentially blow up i'd glady test the +5v to vdimm mosfet on the LP-UT (requires cut trace) to see if it works.
When you do this mod, you are completely bypassing the motherboard circuits that provide the vdimm, making them irrelevant.Quote:
Originally Posted by Bennah
depends on the board, squeakygeek. nF2 lanparty/infinity do not play well with this mod or with voltage boosters.
I modded my 4PCA3+ tonight and am at 285 FSB and climbing... :toast:
Man if I knew it was that easy would have dont it along time ago!
I need to do the PSU mod now to get my vdim above 3.26.... :cool:
I don't mean that this mod is a good idea on all boards, I mean that this mod will supply 3.3v directly to the ram on all boards.Quote:
Originally Posted by STEvil
Attaching a fan over ram is pretty easy: rubber bands!Quote:
Originally Posted by TyphooN
check this thread out.
http://forums.extremeoverclocking.co...d.php?t=113513
not sure if having pots throws a spanner in the works, but here's one psu mod guide:Quote:
Originally Posted by rabeb25
http://www.bleedinedge.com/guides/ps...v_mod_pg1.html
I did it and can take my 3.3 rail up to 38v before it craps out...
Hey, can you post a pic of your mod with the neo2? and was it the platinum?
EDIT: Here's another good guide
http://forums.extremeoverclocking.co...ad.php?t=97195
Will this mod work on a DFI lanparty pro 875B mobo? Anyone try it? It worked so good on my 4PCA3+ a friend of mine wants to mod his DFI..... The lanparty only goes to 2.9 vdimm just like my Epox did...... :stick:
i think ill make myself a voltage regulator off the 5v rail and send 3.6 to the memory or if i can turn the rail on my Antec480 True blue psu just do that
Want to hear some more about this as well. I've had a direct +3.3v mod for months. Now I'd like more. Should be able to put +3.3v rail at about 3.65v, but I'd prefer closer to 4v if possible. Anyone got the the +5v rail reduced successfully?Quote:
Originally Posted by rabeb25
Update on the DFI lanparty pro 875B rev. B1 mobo.....
Went ahead and tried it tonight and it works but max vdimm measured at back of mobo can only be set to 3.28 max to be safe (adjustable 3.3 rail PSU) as OVP kicks in at 3.30.....
Can Rio or ANYONE help me with disabling the overvoltage protection for the vdimm on this board? Man if I can get that accomplished I will be happier than a pig in the mud!
Cut sense wire "small orange that runs with fat orange" to molex and add a 10 ohm 1/4w resistor in line. Next the side of the resistor thats closer to the psu solder a thin wire and connect that to a 10k ohm VR and ground the VR to the psu's ground. Set VR at 10k to start set front panel on antec to max 3.3-3.42v and then adjust this 10k until you get to about 3.65-3.75v. Now with front panel you should have a high of 3.65v and a low of about 3.3v enjoy.Quote:
Originally Posted by rabeb25
I have a few questions.
How are you guys gettings 3.6 and above with your psu's, I have an antec with the pots that I can adjust but I can't get more that 3.33.
I did the mod on my MSI neo 2 and it works awesome...but I need more voltage, I am stuck at 250 fsb right now with 2,2,2,5 1:1 timings.
Did we ever figure out how to use the 5 volt rail? because my bh-5 is screaming for some 3.6+ volts
Thanks
Bryan
How about doing this 3.3v mod to an Abit KV8 Pro 1.1??
Help me a bit, I can post pictures of this mobo if you can tell me where to solder... ;)
P.D.
Excuse for my bad english... :( :(
I have designed/built a regulator which allows the 5v line to be be adjusted between 0-5v. I will draw up and post the circuit diagram if anyone is interested in it. I am using the regulator on my NF7-s and it appears to work well.
Please do :D
circuit diagram
The circuit uses a LM358 OPAMP, which should be powered from the 12 volt line, so will priovide a maximum of about 10v which is enough voltage to be able to fully turn on the MOSFET. The +'ve pin (which should be connected to +12v) is pin 8 and the -'ve pin (which should be connected to ground) is pin 4. The LM358 is a dual OPAMP, with the other half being left unused. The IRF540 MOSFET is rated to about 100w iirc, so should be able to provide enough power for RAM as long as it has an adequate heat sink on it.
100w is a bit low... is that rated with or without heatsink?
I think it is rated with a heatsink. I worked out that it *should* be able to supply 5v@20 amps and 3.3v@30 amps as long as it is cooled properly, so it should be enough for most RAM
heh.. my 2x512 of CH-5 will eat up 1 amp per chip.. thats 32 chips ;) TCCD are known to pull even more than BH/CH..
It might be enough, but I think we'd be stretching it pretty thin by running TCCD or BH/CH at high clocks.. and ramping up the volts could push it past its limits in a real hurry.
Most of the power supplies I have seen are rated to about 30amps on the 3.3v line. If you do the Vio=Vdimm mod and the RAM used that much power I would expect the power supply to shut off due to OCP. Also, I doubt that the thickness of the cable that I have seen used in the Vio=Vdimm mod could supply 30 amps without melting. However, if you want to be able to supply massive currents to your RAM, a different MOSFET such as the HUF75337P3 which is rated to 60amps+ could be used. I would advise against drawing that much power from a PSU tho!
hi, I want to do a vdimm mod on a 8kda3i mobo, all i have to do is soldering a wire between the 3.3v rail and some pin on a dimm slot? but what pin? could you tell me? thanks !
I agree persivore, and I know each chip is not under full load all the time.. thats why we dont see them tripping out and wires catching fire.. heh.
Being that we regularly push equipment past its rated limits 100w might just be a bit close to the edge with 2x512 at high mhz with a bunch of volts.. :D
???could you tell me what pin do i have to solder? 10q
By all means, do it - I want to see results :D. The thing is, you get diminishing returns past 3.9vdimm - you have to raise vdimm by 0.1 to get another 2Mhz out of it. What I suggest doing is making an evaporator that will mount on a single-sided BH-5 stick. Running it at -90ish should do the trick to enable you to use 0-0-0-0 timings (everything happens statically!) at DDR500-550.Quote:
Originally Posted by enzoR
that looks cool , i will try it when my mobo comes :)
mmm... i dont know how it works and what circuit the ovp made..Quote:
Originally Posted by moparacer
if the mobo not in my hands.... i can't help you... so sorry, man.. :( :(
It might be possible to disable the OVP on the board. If you can post some pictures of the Dimm slot area, I might be able to help.Quote:
Originally Posted by moparacer
maybe had been already postet, but can anyone tell me, where to measure vtt on is7 ?
Hi kryz,
I know the point to measure the VTT. You can see it on my picture. ;)
Sorry for using this old thread ;)
Is this mod also available an a P4C800 Deluxe?
The easy version of the mod, is to locate Pin 7 of the dlots and connect it to the orange wire of the ATX connector?!
Does this version work with my mainboard? Or are there any other modifications necessary?
Cause of my bad english, i dont understand the whole VTT problem.... can somebody explain it in german or in easy english?
BR Loopy
Send me a PM with your icq number, I'll explain it to you!
Vtt should always be around 1/2 of Vdimm..
The problem is when you connect the 3.3v wire directly to vdimm you have a chance the Vtt won't track and you'll get poor results..
I built myself a separate Vtt/Vdimm supplie for my nf7 (also because the one on the board was evaporated).. It's very easy, use 2 OPAMPS some resistors and 2 power mosfets.. With here and there a capacitor and a Zenerdiode for reference voltage it's very stable, I've been using this for more then 2 years now without problems..
You can just regulate Vdimm to what you want by turning a trimmer, and the fet's are powered from +5v:D