How to volt mod IC7 Vmem

Thanks Hipro5. Your method worked perfectly. I can get 3.24V completely stable, but I'm just gonna stay at 2.95V to be safe. My GEIL ram is rated at 3.1V. This really helped with some stability problems I was having at my high overclocks. :)

what woudl a good ground be?
im kind of a noob at this :(

for the hipro method

Quote:

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what woudl a good ground be?

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I used pin 2 on the IDE channel. It is the bottom pin on the edge near the motherboard screw.

Use a fan connector...

My volt mod has prooved good and has allowed for ~3.28V and i could push my bh-5 to 240 FSB @ 2-2-2-5 for everyday use. This is dual channel btw.... it can go to around 260 at the same timings in single channel.

Well I tried the Hipro Method and hooked everything up and It wouldn't start... It would turn on for half a second and then shut down... I rechecked everything and didn't see anything wrong... I grounded the 1K trimmer to the ground on a Fan Header... Only thing I can think of now is that I added 5 Ultra high output fans with a new case.... I ended up killing the left pad on my R50 looking for a short... I'm now going to try and see if I can use the left side of the resister benith R50... I'm going to remove everthing but what is needed for boot and see if that helps me out... I hope that I can get it to boot... I'm just hopeing that I didn't kill my board...

I just want to make sure that the left side of the resister below R50 is the right one to use... Also if the pad on the right side of R50 gets removed is their another spot I can use to access that trace??? Thank You...

Maglin

tonight im gonna mod my board for the memory voltage.

all i gotta do is use a pair of tweezers, twist off the resister that is there, solder on 2 new wires, add the pot and hope it boots?

this sound about right?

Id solder the resistor off... but thats about the size of it.

i have a dead nf7-s board that i killed due to condensation that ive use for practicing on. I found that twisting em off is way easier and its actually a little neater. usually all thats left is the solder pads.

Each to his own.

I prefer to keep em (hint - RMA -hint)

Well I have it totally finished... I resoldered everything... Had to use the resister below R50 as I'm stupid and was pulling on wires looking for cold joints and pulled the pad off... I guess you can't just put solder on their to replace the pad.... I tried way to many times.... I'm now getting 14 more FSB running at 284... The mod has upped my DDR Voltage to 3.1 @ 2.8 where it was at 2.74 before the mod.... It's priming right now and it's looking promising... It seems stable so far but it's only been 30 minutes... I'm happy I just didn't have to replace my Motherboard... Ended up the Ram had to be in BankA and my Fans had to be placed on different connectors as it was just pulling to much juice through one cable...

Thanks to all of you who have done this and posted all of you expirences.... I'm super happy with my results... Hell Maybe I can now hit 3.5 Ghz as I know the CPU will do that.... Just hope I can push my Ram a little bit more....

thanks,
Maglin

Can anyone who has done the VDDR mod. pls check their VTT reading when running at anything over 2.8v, but below 3.2v......just want to know if the VTT goes down, like on the MAX3 version.

Thanks

That was the first thing I checked... Mine was actually a tad high before the mod... Now i'm just under Half of my 3.1v.... Here is my numbers and benches...
http://www.swgexposed.com/sandra34.jpg

I think you may have the VDDQ and VTT readings the wrong way around in MBM....do a compare with your bios and let us know your findings......still a good reading though, compared to the MAX3.

Maglin very nice results. But you just saved me time. I was gonna stick my Mushkin levelII black inside my ic7. But seeing your sandra mem score i'll stick with my A-DATA at 284. Score is 6680/6640 or so at that speed. BTW i've killed 2 IC7's already. My fault each time. I was getting tired of soldering for ddr volt mod and got an IC7 MAX3. It did 210 fsb and not very stable. Returned it the same day for another MAX3. Benching 3dmark at 284 with ddr at 284. I couldn't believe the other one only did 210 max. My frist regular ic7 was very unstable but after a few volt mods and maybe newer bios it eventually did 305 fsb with ddr multi at 3/2. BTW i've checked VTT with my meter and it tracked very close to 1/2 of VDD even after volt mods. Same with this max3 i got. ALmost exactly 1/2 and i've tried 3.2 volts. You could pencil in R124 if you need to raise VTT btw. It's located right side of AGP slot. You can't miss it. It's extremely picky. So when you ohm it out just do a small change to it. SCrew trying to read volts in the bios etc. Some are way off. Hmm think i'll try this mushkin again anyways. I was really liking 247 cas 2-2-2-5 and that might be perfect for my 3.2 P4 as opposed to this 2.4 P4. Ok i hope i said something that helps.

Hipro i'm glad you got the ddr volt mod correct. I was wrong in my instructions dated 2 or 3 months back. I had it right except i had second resistor connected to the upper side of first resistor. I'm glad someone tried it and got it right while my IC7 was dead. Great job dude. :) I have edited my post on other thread and correct instructions are on it now. Tested it on an IC7 and it worked perfect. Make sure you read that thread. My last post dated 11-24 changes the mod to something slightly different. But i believe it is the correct way to do it. Read here Update to correct VDD mod

I want to do the mod, but there is one thing i dont know...
what is a trimmer? could you please give me a link to a page that explains about trimmer?
10X :D

What is being refered to by trimmer is a variable resister.... Potientiomiters are also refered to as trimmers by some... hope that help you some...

Oh, 10X
it helped me a lot!!! :D

Hey guys,

I'm new here and first thanx for showing how to do the mod thing. Well, I had a v-modded NF7-S, that I used Radio Shack trimmers. But those things are a POS. Any place where I can find good ones? Thanx.

BTW, I'm getting an IS7 delivered on monday. I know this mod works on it, but am I heading for frustrations with it? Should I send it back a get an IC7?

i love my ic7 but i have heard many good things about the is7 too so its up to you. if you want pat at high overclockes and other than 1/1 ratio, than get the canterwood.

Anyway, I am abou to do this mod, and just have one question. I purchased a 330ohm fixed resistor, a 10 ohm fixed resistor. Now for the ic7 mod, with the fixed resistor, is the only change i need to make to this drawing http://www.frontpage2000.family-net.org/jris/Schem2.jpg to replace the trimmer with the 330 ohm fixed resistor and everything else will be good? Also, this 330 ohm resistor should give me around 3.2 volts? or 3.0? Any help is greatly appreciated.


Edit: srry for borrowing the pictur, hope you dont mind.

The reason you want to use a variable resister instead of the 330 ohm resister is that it might not yeild you what you want.... It's a litter different for everyone... You need to trim it to what you want... I have mine set so that at 2.8v in BIOS I'm getting 3.1 volts to the memory... So now I don't have to fuss with it... I probably should just take it out and ohm it and get a fixed resister that would be the same as my POS variable resister is at now... If I want 3.0 volts I just choose 2.7 in BIOS... It's very stable... Took a little bit to burn in my Memory as it has never seen that amount of voltage but after a few weeks of settleing in its rock stable.... I'ma happy modder... :)

Thanks for all!

I tried Vddr mod on my IC7(Rev1.1).
In this method, I can get Vddr=3.25V @Vio=3.3V.
Of course it depends on Vio, so Vddr=3.5V over is available
in case of Vio=3.6V;-)

Blue wire should go GND. I used an empty pattern of MC506.
At first, the 500ohm POT should set as yellow & gree cables
shortened. Turn the POT clockwise, Vddr is increasing.

This method doesn't care Vtt, but I found a W83303D pin
which shows Vtt, so I wonder it's also applicable...

I could also modify Vagp, but it needs pattern cut or leg-up;-)

Enjoy it!

i dont understand. is this better than hipro5's method? and what exactly is the schematic for the green and yellow wires... can u draw the whole circuit as a picture? what vio aswell? i'm guessing the 3.3 line fromthe ps?

Hello enzoR,

> i dont understand. is this better than hipro5's method?
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I don't know better or worse, but it works stably.

> and what exactly is the schematic for the green and yellow
> wires... can u draw the whole circuit as a picture?
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I attached a picture.
W83303D acts as holding voltage at green wire to Vddr
value defined by BIOS setting, so actual Vddr is increasing
according to resistor ratio of 500ohm pot.

> what vio aswell? i'm guessing the 3.3 line fromthe ps?
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Yes, of course. So we use PowerSupplyUnit which can be
modified Vio(for example, AOpen FSP400-60GN).

Thanks

thanks for the fast reply. i thought it was something like that. i was just getting confused about it being on a PCB, and the +5, and +3.3v lines their.

ok.. and before i start, i need to make sure that the resistange between the green and yellow wires is 0ohms on the trimmer right? also, would you know what a Vppl mod is? hipro did it to his ic7....