Abit IC7 and PSU +3.3V mod

[Soltani]

Hey

I have just moddet my +3.3v on my 550w psu, i can get it up to about 4v now, but my memory volt doesnt raise what is the problem??

Somebody say that there are some overvolting protection on the mainboard that should be removed, if yes how do i do???

[Minnyboy]

You've done the Vmem mod as it says in your sig??

I have an IC7-G & have done the Vmem/Vtt mod on it as well as the 3.3v mod on my PSU & it seems to work fine...

Admittedly, I have yet to try & take my Vmem any higher than 3.4v..

Are you having problems getting past 3.4v or is the problem more severe like not going above 3v??

Need more info here to maybe help you out if I can...

You doing the VTT mod as well?? It helps you know, I was struggling to get 235Mhz dual channel b4 I did the VTT mod but once I did that, it gave me an extra 15Mhz as well as allowing me to turn up the GAT settings...

Minnyboy

[Soltani]

Yes i have done the Vmem mod but i havent done the VTT mod, with the vmem mod i can get about 3.2v, now with the psu mod it is still only 3.2v no matter how much i raise the 3.3v... When i fx raise the 3.3v to 3.7 the vmem still is 3.2 but very unstable and swinging from 3.12 to 3.24 ?????

[charlie]

did you install the fixed 10ohm resistor in ADDITION to the VR??

C

[Minnyboy]

I agree with Charlie here....

Can you describe which way you did the mod??

The way described by hipro5 is the best way to do it as it allows more than 3.2v iirc....

The other way limits you to only 3.2v & under...

desolder R50 resistor & solder 10ohm fixed resistor to pads of R50 (or was that MC50??) & then solder 1K VR to fixed resistor & ground...

I did it differently as I could not get an smd 10ohm resistors....

I solder 1 leg of 10ohm fixed to bottom pad of R50 (MC50??) & the other leg to bottom leg of the mosfet just above the resistor..
Then I soldered a 1K VR (set to 220ohms) to bottom leg of 10ohm fixed & ground of fan header...

Dialed up 3.4v & was happy with results, I'm sure I can dial in much higher volts but am quite happy with 3.4v...

Maybe you need to re-do the mod the way hipro5 described or the way I described above (which is a bit easier imo)...

Cheers,
Minnyboy

[Soltani]

On the psu mod i used a 10Ohm and a 1K VR, on the Vmem mod i only used a 1K VR, which i was told to do??!!

[enzoR]

Thats your problem. Here you go: LINKY (http://www.malvescorner.com/ic7.htm)

[Minnyboy]

Originally posted by Soltani
On the psu mod i used a 10Ohm and a 1K VR, on the Vmem mod i only used a 1K VR, which i was told to do??!!

Your PSU mod's fine.... It's your IC7 Vmem mod that's the problem...

It's been noted that doing the Vmem mod the way you described is NOT right....Works up to 3.2v but no further, any further & you'll get the problems you described....Your Vdimm fluctuating like crazy....

If you clicked the linky that enzoR described you'll find a different method to what I've described again....

The other option would be to go back to the IC7 Vmem mod thread & go to the last few pages or look up my username in that post as I only joined in after I'd asked a few ppl about which mod was the best one to do...

Better still, hipro5 has posted a link to his site where he's done all the mods for the IC7 & you'll find what you need there....

IMO it'll be easier for you to follow Malve's way of doing the mod as all you'd have to do is either cut you VR off (if you've already cut the third leg off your VR) & resolder a new VR like Malves way...

If that don't work then just solder a fixed resistor to the wires already in place & do the mod as I've described... easier now that you've already got some wires soldered to the pad...

Easy fix...

Cheers,
Minnyboy

[Soltani]

hmm ok then the only thing i have to do is putting a wire from the MC147 to the third or last leg of my VR right?

[Minnyboy]

It certainly looks like it from his website...

That'd be the easier option for ya....Give that a go & if that fails, try the other method...

There certainly is a few ways of doing this mod, I can't say for sure that the other methods will work as I've done it a bit differently....Basically a modified version of hipro5's way...

here's a pic describing the way I've done it...

just in case you wanna do it....

Cheers,
Minnyboy

[Soltani]

Hmm thanks, but does that mean that i have to change my 1K ohm VR to a 200 ohm?

I think that malves guide look a little more simple, but can some of you tell me if i can use the 1k ohm, and if it is enough to solder the MC147 to the last leg of my VR?

[Minnyboy]

Set your 1K VR to roughly between 220-320ohms to start with & go from there...

Try & remember back to when you first did the mod, what did you set you VR to?? iirc, just set it to that & you'll be right to go...

Once the mod is done you can finetune it to your liking...

Cheers,
Minnyboy

[Soltani]

Originally posted by Minnyboy
It certainly looks like it from his website...

That'd be the easier option for ya....Give that a go & if that fails, try the other method...

There certainly is a few ways of doing this mod, I can't say for sure that the other methods will work as I've done it a bit differently....Basically a modified version of hipro5's way...

here's a pic describing the way I've done it...

just in case you wanna do it....

Cheers,
Minnyboy

What is the Mosfet that is on teh picture were can i find it?

[Minnyboy]

Originally posted by Soltani
What is the Mosfet that is on teh picture were can i find it?

I've edited hipro5's pic to show you where the leg of the mosfet is... Circled in red to the right of the R50 resistor...

Cheers,
Minnyboy

[Soltani]

It looks darm difficult:eek: but of course ill try it out:D

Thanks :toast:

[Soltani]

Hey I just did the mod like Malves way with my 1K ohm resistor but now i can give about 4v to ram i think but this is insane:slobber:

[Minnyboy]

Glad to see it worked out for ya....

Give 'em h3ll m8....Til she bleeds...jk

What memory you running....Probably a silly question as at least 90% of users who vmod their mobos use BH5 but I thought I'd ask anyways....

My problem now is that if I give my XMS3500 more than 3.4v, it don't clock any higher...That's at 2-5-2-2 though, I have yet to loosen the timings as I don't like 'em loose...

/me likes 'em nice & tight, me little beatches that is....:D :D


Cheers,
Minnyboy

[Soltani]

i dont use the HyperX any more, have to update my sig, now i use some Mushkin PC3200 Special with BH6 i can run 246 at 2-2-2-5 at 3.2V how much voltage is safe to give them at 24/7 ???

[Minnyboy]

I've been running mine at 3.4v/1.7vtt ever since I found out they liked it that high....

Haven't taken the hs off mine as I don't think it needs it off...I got one of them Zalman 90mm fans & fan brackets & rheobus set up to blow on my ram for cooling....

Now no matter how bad I stress my rig out, me ram don't get hot:D :D. Just a pity that they don't go any higher than 250mhz...

Have you tried using 5/4 with your Mushkin BH6 yet?? Wanted to ask ya if you run into any walls when using dividers.

Mine runs straight into a brick wall past 235mhz when using 5/4 dividers... Don't need it that high when using 5/4 but it'd be nice to have them run smoothly at the same speeds when in 1/1 & 5/4 etc...

Anyways, getting late...Heading off to bed, midnight here in AUS & gotta work:( so I can get more parts....

Good luck with your rig & may the OC gods bless you with a ripper of a rig:toast:

Cheers,
Minnyboy

[Soltani]

Hehe thx m8 and you 2:toast:

[bias_hjorth]

I believe winbond specifies their bh chips to 3.4/3.5 max.. So around that 24/7 and you should be fine.

[Soltani]

OK thanks, they run stable at 240 2-2-2-5 and 3.1V so for a while I think ill run at this speed... At 3.1v i dont have to use a fan on my Ram.