How to volt mod IC7 Vmem

[Szymek]

Originally posted by macci
Very nice 'all in one' IC7 Vmem guide

I've been pushing my HyperX today again on IC7 and can run Superpi 1M at 257.1MHz 2-2-2-6. This is with Vddr@3.52V/Vtt@1.76V/Vagp@1.79V/PSU 3.3V@3.6V.
I removed the stock NB cooler and installed bigger heatsink with delta fan on it. Also removed all the original heattransfer stuff and replaced it with normal white paste. Open-window mod gave some 10C ambient temps so the NB was rather cool.
The same RAM has done 258-259 on P4C800 which had only Vdimm mod at 3.46V.
Any ideas on how to make the IC7 go even higher?
Vnorth mod? Something else?
Where is hipro with his special mods huh?

If you did the vagp mod you should also achieve higher vnorth voltage as well...

[macci]

Hmm didn't measure the Vnorth while I had the Vagp at 1.8V.

Anyways on P4C800 the same ram is doing 260.5MHz 1:1 2-2-2-5 TURBO superpi 1M stable. Vddr at 3.48V, Vagp at 1.795V and Vnorth at 1.59V (so asus is giving higher Vnorth by default).
Vagp at 1.55V it wont even do 253 on ASUS.
Going to vmod ASUS Vagp/Vnorth and IC7 Vnorth now.

[Minnyboy]

Originally posted by kyosen
This pic shows my IC7(#2) Vddr & Vtt(Vbt) mods. It says all

In your pic, you say that you cut the the trace off something (I can find it but haen't had a proper look for it on my board & then did the resistor/VR mod.
Could you be a bit clearer for me so i can get my tech guy to do the VTT mod for me?

He's very good with electronics, being an electronic engineer & all. If I brought him the pic you posted, do you think he'd be able to figure it out?

Also, what is need? I don't seem to see a fixed resistor in your pic, is it needed?
I think it would be easier cutting the trace the way you done it. Just not sire on the other specs.
So far I have my IC7 mem modded, 9800pro Vgpu/Vddr modded, doing the 3.3v, 5v, 12v mod for my TP 550w PSU.
I'm getting meself some BH-5's so I'd definitely need the VTT mod.

This "sickness" is getting outta control!! Got a Vapo Classic that I'm trying to find a way to mod it for my 9800pro...

Best thing I've done since I start OCing/modding? XS forums!!

[Malves]

Originally posted by macci
Hmm didn't measure the Vnorth while I had the Vagp at 1.8V.

Anyways on P4C800 the same ram is doing 260.5MHz 1:1 2-2-2-5 TURBO superpi 1M stable. Vddr at 3.48V, Vagp at 1.795V and Vnorth at 1.59V (so asus is giving higher Vnorth by default).
Vagp at 1.55V it wont even do 253 on ASUS.
Going to vmod ASUS Vagp/Vnorth and IC7 Vnorth now.

Hey macci,

Where do I measure Vagp and Vnorth on the P4C800? Also, is there any mod for Vnorth on it?

BTW, I did the droop mod on my asus following your pic, and the vcore is slowly fluctuating +-1% idle or load. Used a 100K trimmer set @ 34k. Is 1% variation ok or I've done it incorrectly?

[macci]

1% fluctuation sounds normal after the vdroop mod.

You can measure the Vagp from the mosfet just below AGP slot (mosfet is next to LM324 chip).
Vnorth voltage from the other side of the AGP slot (there is another LM324 chip near there). You can take the reading from the empty mosfet solderpad for instance.

The lm324 chips are more than likely used in the Vagp and Vnorth mod. I'll take a closer look at it prolly tomorrow.

But now its Xmas!

[kyosen]

Hello macci, I'm very encouraged by your comment.
Many thanks!!!

Hello Minnyboy,

> Could you be a bit clearer for me so i can get my tech guy
> to do the VTT mod for me?
--
So I attached the pic of my IC7(#1, dead;-).
# Condenser(EC1) had been removed for PCB research.
I believe this pic and previous one are enough for mod by
my method.

> I don't seem to see a fixed resistor in your pic, is it needed?
--
No, needless. The POT works fine by this connection!

Regards

[CATCH22ATPLAY]

Damn Macci you're like so close to beating my 258 cas 2-2-2-5 record on my ic7

[Minnyboy]

Thanks kyosen,
I'm taking my board to get this VTT mod done soon as Christmas/New Year period is over.

BTW, Merry Christmas & A Happy New Year To All

edit:
Is the IC7-G/Max3 Vmem mods the same?
Looks very similar to me.

[Szymek]

.read below

[Szymek]

Originally posted by CATCH22ATPLAY
Kyosen Vagp mod does not require cutting traces. Use the Lm358 chip left of southbridge chip.

Kyosen i'm working on a better VTT mod. I have it complete already and pics. Just gotta put everything back together and test it. I didn't cut the trace on the front of the mobo. I cut the trace on the back side. Then soldered a VR from left side MC50 to bottom leg of mosfet located in upper right corner of mobo. A bit easier than the old way of doing it. A finished pic of VTT mod. The green wires only.

Hey Catch

Have you got some more info/pics on the VAGP mod ? I know I need that to push my mobo to higher FSB...

thanks catch

[CATCH22ATPLAY]

Nope. But i'll look into it. I think i'm gonna play with my p4c800 for a few days though. I can't seem to get above 318FSB on this IC7. Benching 3dmark at 310 was max. The IC7 either needs the Vagp mod or if you've noticed the caps and mosfets will burn your fingers. Maybe they are maxxed out. Only errors i get are agp vid card errors and not cpu or mem when i try to bench above 310fsb. I had to disable fastwrites i run in agpx4 for 318FSB btw. That was lame lemme tell you. If i got a pci vid card i may put it in and really test if the agp was limiting max FSB. But for now it's Anus time.

[Malves]

But for now it's Asus time.

Hey Catch,

Any thoughts on what you're planning in doing on the P4C800?

[CATCH22ATPLAY]

Oh i'll just volt mod the F out of it like i do all my mobos. Thing is i've tried my p4c800 and hated it and my albatrons and MSI's etc etc. None come close to my ic7 and ic7max3 O/C's. But i'm selling or actually sold this p4c800 and i'm gonna mail it saturday. I just wanna spend a little quality time with it. It's only got like 8 hours use so far. I gotta try it at least once more.

[Minnyboy]

I just wanna ask guys with XMS3500 on whether the VTT mod will help out with getting higher speeds from my XMS3500 BH-5's?

Just wanted to know if it's worth it doing the VTT mod.
Currently maxing out at DDR466 (2-5-2-2 @ 3.2v) but my VTT is somewhere in the 1.2v range.

Right now I'm at the perfect 5/4 for my 2.6c that tops out at 284fsb.

So, anyone with XMS3500 BH-5's or any BH-5's that gained from doing the VTT mod as well?

Any comments anyone?

I'll have a search through this thread but would also like to hear from BH-5 owner's & their gains from doing the VTT mods.

Cheers,

[mikead_99]

Originally posted by Minnyboy
I just wanna ask guys with XMS3500 on whether the VTT mod will help out with getting higher speeds from my XMS3500 BH-5's?

Just wanted to know if it's worth it doing the VTT mod.
Currently maxing out at DDR466 (2-5-2-2 @ 3.2v) but my VTT is somewhere in the 1.2v range.

Right now I'm at the perfect 5/4 for my 2.6c that tops out at 284fsb.

So, anyone with XMS3500 BH-5's or any BH-5's that gained from doing the VTT mod as well?

Any comments anyone?

I'll have a search through this thread but would also like to hear from BH-5 owner's & their gains from doing the VTT mods.

Cheers,

Not XMS, but I gained quite a bit. I was unable to get anything stable over 220 because I needed more than 2.8v. I couldn't even boot 2.9v, but anything higher would boot, just not run stable. Currently running 233 w/3.0v at 2-2-2-5, GAT = A-A-A-A-A. And yes, BH-5 does burn in, 233 was popping an occasional memtest86 error 2 weeks ago. Now I am getting real close (1 error/5loops) to getting same timings but GAT = T-A-A-A-A. No errors at all with A-A-A-A-A. Right now I'm waiting on some better cooling for the cpu, so I haven't been able to push the memory any harder....but I will.

[Minnyboy]

I'm getting errors at 233fsb @2-5-2-2/3.2v (1.4VTT) doing these loops:
Memtest86 v3.0
test 5 = 100 loops=pass
test 6 = 100 loops= errors pop up after 15 of so passes
test 3 = 50 loops= haven't tried yet cos of errors on test 6.

My mobo is the IC7-G with Vdimm/Vmem mod. I had a look in the bios & at 3.2v my VTT is 1.4v.

I guess I'll find out whether the VTT mod does help my ram or not a bit later this week.

Haven't tried GAT out yet, have got the last 2 options disabled. Will give it a shot later. Got this 12cm Sunon fan blowing like a vacuum cleaner that disturbs everything near it, TV & all.hehehehehe

Not gonna do the Vagp mod as I don't see the need as of yet. CPU is maxing out B4 mobo is.

[shortbus]

change your timings to 2-3-2-6 and it should be ok.

im on my way to radio shack to pick up a 500 ohm pot and a multimeter.

just wondering, once i get it all set up where do i measure the resistance for the vdimm mod, and how much should it be.

[sinn]

Could one of you guys post a parts list and maybe an updated VTT mod? im planning on going by radio shack tommorow to get teh stuff

[shortbus]

what do i use for ground and what do i set the 1k pot to using hipros method?

[sinn]

Originally posted by shortbus
what do i use for ground and what do i set the 1k pot to using hipros method?

you can just run the ground to like a screwhole or something

[Minnyboy]

shortbus,

If I remember correctly, I set my 1K Ohm VR to 290 Ohms & then got my friend to solder it on.

My friend modifed hipro5's method a bit (easier for him to do the soldering but you should be able to find the modified version somewhere in this thread.

My friend soldered onto the pad closest to the Winbond chip & the other leg onto the mosfet leg clostest to the other R50 pad but you might wanna look back a couple of pages if you choose my "altered method".

I'm using a fan header for ground & am thinking of doing the same for the VTT mod if it apples to there as well. Got a rheobus to control the fans so the mobo fan headers are there for looks.

As for running my ram at 2-3-2-6, I didn't want to do that since I won't be running 1/1. Maybe later on with a P4 3.2 or so. But right now I'm trying to see if the VTT mod will help me out in gaining some more Mhz at 2-5-2-2.

[computerpro3]

how the hell do I know what ohmage I am setting the trimpot to? There's no markings. Do i use a multimeter?

[Szymek]

Originally posted by computerpro3
how the hell do I know what ohmage I am setting the trimpot to? There's no markings. Do i use a multimeter?

Aye

[CATCH22ATPLAY]

A what?

[Szymek]

Originally posted by CATCH22ATPLAY
A what?

You should have studied in Scotland

Means yes of course