max3 Vdimm stabalisation mod.

Boyne7 er no to smd grabbers dude.

impu|se correct. Alternate way is to use 1 vario. Try a 1k vario 20-25 turn cerment pot. set resistance between middle pin and one of the outer pins to 200 ohms. Connect middle pin to left pad of mc 50 after removing mc50. Connect the pin you set for 200 ohms to mosfet located upper right corner of mobo. The lower leg of that mosfet. Connect other pin to ground. Pic kinda shows what i mean. Was running at 254 for the last few hours but it finally crashed. Testing 253 cas2-2-2-5 cpc enabled and fastest gat/pat er whatever it's called.

Catch can you correct me if I'm wrong. I'm trying to put this all together, and I'm kinda confused with all the revisions.

Do you remove MC50 or leave it and solder to it?


1. remove resistor mc64
2. cut the trace on the back of mobo

3. remove mc50 or leave mc50??????????

4.Alternate way is to use 1 vario. Try a 1k vario 20-25 turn cerment pot. set resistance between middle pin and one of the outer pins to 200 ohms. Connect middle pin to left pad of mc 50 after removing mc50. Connect the pin you set for 200 ohms to mosfet located upper right corner of mobo. The lower leg of that mosfet. Connect other pin to ground. Pic kinda shows what i mean.

http://www.xtremesystems.org/forums/...&postid=298638

http://www.xtremesystems.org/forums/...&postid=275598

http://pages.prodigy.net/catch22atplay/vmod3.jpg

Yeah we're a little bit confused :)

Which method is the best for the VTT alteration ?

Help us not to fry our mobos :toast:

I did it this way:

cut the trace on the backside like on catch22's pic.
solder 1k VR middle pin to MC50 upper side, solder one of the side pins of the VR to Vtt mosfet pin (left pin), solder the third VR pin to GND. Set the VR value to 0ohms between MC50 and Vtt mosfet pin (0hms between the VR middle pin and the VR pin u soldered to Vtt mosfet). Start increasing the resistance between MC50 and Vtt mosfet pin and measure the Vtt from Mosfet leg with multimeter.
This is on IC7 and BIOS doesn't seem to read the Vtt voltage changes made by the mod.
I stabilized mine at 247 1:1 2-2-2-5 with the mod (Vdimm 3.3V, Vtt 1.65V). Without the mod it would just reboot and give bluescreens for me even at 240.
time to imporve NB cooling and increase some other volts now. Also added another capacitor right below AGP slot (the cap there was running DAMN HOT!)

Wonder if I should remove the MC50 and MC64? My Vdimm doesn't seem to flucuate too much thou (0.02V or so).

Szymek, you killed IC7 wth Vnorth mod? how did that happen? what went wrong?

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Originally posted by macci
I did it this way:

cut the trace on the backside like on catch22's pic.
solder 1k VR middle pin to MC50 upper side, solder one of the side pins of the VR to Vtt mosfet pin (left pin), solder the third VR pin to GND. Set the VR value to 0ohms between MC50 and Vtt mosfet pin (0hms between the VR middle pin and the VR pin u soldered to Vtt mosfet). Start increasing the resistance between MC50 and Vtt mosfet pin and measure the Vtt from Mosfet leg with multimeter.
This is on IC7 and BIOS doesn't seem to read the Vtt voltage changes made by the mod.
I stabilized mine at 247 1:1 2-2-2-5 with the mod (Vdimm 3.3V, Vtt 1.65V). Without the mod it would just reboot and give bluescreens for me even at 240.
time to imporve NB cooling and increase some other volts now. Also added another capacitor right below AGP slot (the cap there was running DAMN HOT!)

Wonder if I should remove the MC50 and MC64? My Vdimm doesn't seem to flucuate too much thou (0.02V or so).

Szymek, you killed IC7 wth Vnorth mod? how did that happen? what went wrong?

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Hello macci I feel like crazy cause you said my name :banana:

kiddin' :)

I killed my IC7 cause I had changed Vnorth voltage 'on the fly' like I do on my modded R9800...

The other thing is that I wasn't sure what direction my VR was supposed to turn to....

Maybe I reached MAX in my VR and the turned and turned... maybe I cracked something inside the VR, then caused open circuit in it and... psssstt OH SMELLS GOOD :D

hehhe ok, better be careful with that one then :D

can pass SuperPi 1M at 255 1:1 now on IC7 with HyperX PC3000 @2-2-2-6

Excellent macci. Now do my northy mod as well. I run it at 1.625. ANything above that is messed up. I got my corsair pc3500v1.1 up to 258 cas2-2-2-5 turbo cpc enabled on my non max 3. Seems 255 is 100% stable though. I've been running it at that speed for the last few days now. Here's the voltage required to do that. Macci if your voltages are stable i say leave MC50 and MC64 alone dude. BTW sandra unbuffered was 3519/3605 :D

Let's see some screenies dudes, upload attachments etc. :)

VDD=3.5
VTT=1.775
3.3V line set to 3.80
Vnorth=1.625

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Originally posted by CATCH22ATPLAY
Excellent macci. Now do my northy mod as well. I run it at 1.625. ANything above that is messed up. I got my corsair pc3500v1.1 up to 258 cas2-2-2-5 turbo on my non max 3. Seems 255 is 100% stable though. I've been running it at that speed for the last few days now. Here's the voltage required to do that. Macci if your voltages are stable i say leave MC50 and MC64 alone dude. BTW sandra unbuffered was 3519/3605 :D

Let's see some screenies dudes, upload attachments etc. :)

VDD=3.5
VTT=1.775
3.3V line set to 3.80
Vnorth=1.625

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nice results and desktop design :toast:

LOL i know dude. My desktop is always like that. Hard to believe i can get a top 10 3dmark score any day of the week. I format hdd after maybe 10 different mobos. Screw tweaking windows. It's a waste of time. But as you can see i don't organise things too well.

Macci i bought some of that HyperX pc3000 back when you said it was pretty good stuff. I've noticed that it scores better than any memory out there. I haven't been able to get mine past 245 though. I didn't even try 2-2-2-6 i don't believe. Was that the trick here. Also i pulled the heat spreader off and the chips say Kingston on mine. Binned Sammy pc2700 ddr you think? See if we have the same stuff. here's my numbers off the sticks.
KHX3000/256
9905200-017.A00
1168031-2.5V

They aren't the value ram. I can get the value ram real cheap here. Lemme know what's you got dude. I may try some out if they can beat my score above or clock higher. Ta my friend.

Merry Christmas to all and to all a good night. :D

ps santa left me a new Fluke and amp probe :toast:

I need some help here with the Max3 guys. I've read the IC7 Mem Mod thread & have successfully doen the mem mod but am a bit hesitant on doing the same on my Max3.

I want/need more vDimm to play with on my Max3. The area around the Max3/-G looks very similar except the Max3 has 1 more resistor(?) just above the R50 resistor. Can my Max3 be vmem modded in the same way as my -G?

I'm planning on doing all these mods for my IC7-G/Max3. Vmem, VTT, as well as doing all the PSU vio mods as well.

TIA guys

Minnyboy for VDD mod of a max3 leave R50 alone. Remove MC64 and in it's place stick a 2k ohm vario resistor. Set it at 2k ohm. Only 2 pins of the vario are required. Adjust the 2k ohm to raise VDD to 3.2+ If you set that 2k ohm resistor at 2k ohm and have bios at 3.2v you'll get about 3.45+ volts to VDD. Easiest mod of them all. I would suggest setting your bios at 2.8v before mod though :D

Nice clocks Catch! :)

I tried Vnorth (from 1.59 up to 1.65V) and also had Vagp up to 1.9V but still can't pass Superpi 1M higher than 258.3 - and the thing did that speed only once on the first boot when everything was nice and cold (used open window mod hehhe). Normally max speed is 257 1:1

Does you HyperX have two little dots on each chip? Its most likely remarked BH5 or BH6. I dont think 2700 sammy would ever run 2-2-2 timings at 240+
I haven't taken the spreader off my HyperX but it says this on the sticker:

KHX3000/256
9905192-019.A00
1213206-2.5V

Single sided modules.

CATCH22ATPPLAY,
Thanks for that invaluable info.
Now all I gotta do is raise my Max3 from the dead.
Actually asking for another member. Almost stuffed his board up by saying that the IC7 & Max3 VDD/Vmem mods were the same.

Macci i just took the spreaders off. It says

Kingston
V56471
0306 P01
D328DW-50

There is a DOT left and right of V56471. So yes 2 DOTS.

The numbers on our sticks look almost the same. But are you sure it's single sided? Mine are dual sided with 4 chips on each side. That's supposed to run cooler that way according to some manufacturers. There is not a chip directly opposite a chip. They are staggered. Sandra unbuffered with the kingston score so well i'll use them when i run below 250mhz. Macci my V agp is actually set at 1.55 in the bios. I haven't raised it for any of my high ddr benches after my vdd/vtt/vnorth mods. I hear a lot of people saying it helps quite a lot. I can raise it to 1.85v or whatever i want as needed. So is yours the same in that raisng Vagp helps quite a bit?

Minnyboy ta dude. I'm here to help. Well the mods are close to the same in some ways. But are not the same in others. You may be able to raise your max3 from the dead. My non max3 was dead and i'm currently typing on it with mods and volts as above. I was just using this semi dead one to first come up with a better way of modding vtt. Quite amazed when it came back to life. So you may have a shot at raising yours from the dead too. At least i hope so.

Be on the look out for a change in volt mods. I got some other ways of doing it which may prove even more stable. If you see a bench from me with ddr@260+ cas2-2-2-5 turbo cpc enabled you'll know i succeeded. I've already run my corsair at 260+ with semi relaxed timings. But that was an old goal i said and accomplished. Now is time to raise or set a new goal.

Hey and btw what's the best way to run unbuffered test. I deselect all options. What are you supposed to do or what does everyone else do? My results seem lame compared to a lot of peoples.


Hmm and nobody noticed/commented on my MO stepping P4 in my pic. :D

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Originally posted by CATCH22ATPLAY
Hey and btw what's the best way to run unbuffered test. I deselect all options. What are you supposed to do or what does everyone else do? My results seem lame compared to a lot of peoples.


Hmm and nobody noticed/commented on my MO stepping P4 in my pic. :D

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Erhm.. 1.85V ;)

CATCH22ATPLAY,
I once had an "MO" stepping 2.4 that did 285fsb@1.6v on WC. Pity I broke a pin on the sucka. Very good OCers those "MO" 2.4c.

Might try to "raise it from the dead as the pin that's broken is on the outer edge.

Has anyone ever tried soldering a pin back on a CPU? Got a few dead CPU's due to broken pins that I could snip off to raise one from the dead.

have you just tried using it without the pin?
sometimes the cpu will still work without the some pins.
my friend broke a pin off his 2.0a and it still worked fine

Hmm yes this stepping 5 M0 is a chip with 2mb L3 cache disabled. My 2.8 runs just like any other 2.8 i've even owned. It needs and likes a lot of voltage. I'm still running it with the stock Intel heatsink/fan and it hits 57C. But i've managed to get it to 290FSB with 1.90 volts with the stock heatsink/fan and never bothered lowering the voltage. I think it may have some potential here. I'll install my shiny new DD RBX WB and turn the shiny new chiller on as well and see wtf happens. If it kicks arse i'll run my a/c on it maybe.

I'd try running that P4 with a broke pin as well. Trying to solder a pin back on is damn near impossible. I've tried it and others as well.

Nah, I haven't tried using it without the pin. Might give it a shot when I have spare time.

I tried a 2.6 with a bent pin & it was giving me reboots whenever I was running CPU/Graphics intensive stuff. I put the blame on the VC (9800XT that shorted something under its HSF on the first install).
Only when changing from a faulty Vapo to a replacement Vapo did I realise that the pin had bent & then "fell" off when trying to straighten it.

Altogether different spots where the pins broke so I may as well give it a shot.

Without the vdimm mod, should you just simply remove the mc64, this is my understanding from bigtoes first post?

EnineM,
I was thinking about giving the Max3 some more volts. Past 3.2v. I'd be doing the VTT stabilisation first of course.

That's if & when I get around to RMAing my dead Max3 that is:(

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There is a DOT left and right of V56471. So yes 2 DOTS.

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Ok thats winbond stuff then. MOst likely BH5.

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But are you sure it's single sided?

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Yup 8 chips per side. I've seen HyperX with 4chips per side too. Thats most likely the most common config.

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So is yours the same in that raisng Vagp helps quite a bit?

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Vagp and Vnorth don't seem to help at all on this one. On P4C800 the Vagp seems to be important. BIOS set to 1.5V will lock up already at 253 1:1, at 1.8V it will pass superpi 1m at 260 1:1 2-2-2-5-Turbo

Ok, what happens if I *JUST* remove mc64? will it help at all?

Quote:

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CATCH22ATPLAY:
Minnyboy for VDD mod of a max3 leave R50 alone. Remove MC64 and in it's place stick a 2k ohm vario resistor. Set it at 2k ohm. Only 2 pins of the vario are required. Adjust the 2k ohm to raise VDD to 3.2+ If you set that 2k ohm resistor at 2k ohm and have bios at 3.2v you'll get about 3.45+ volts to VDD. Easiest mod of them all. I would suggest setting your bios at 2.8v before mod though

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So I could use say a 5k, set at maybe 2.5k and ease it down to get to maybe 3.3V rather than starting off the bat with a 3.45V max?