quick question:
how much will stabilizing the Vdimm (not VTT) benefit in my OC? I use 1:1 currently @ 263FSB. I'm thinkin of RMAing my board for the Vdimm fix but I don't know if it is worth it or not.
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quick question:
how much will stabilizing the Vdimm (not VTT) benefit in my OC? I use 1:1 currently @ 263FSB. I'm thinkin of RMAing my board for the Vdimm fix but I don't know if it is worth it or not.
I quite don't understand. Up to what FSB are you good to?Quote:
Originally posted by Sanousie
Ok i did the mod it made my vdimm stable but i still cant use anything above 2.8 the vtt is very low at 1.26 at 2.9 and 1.4 at 3.2 non of hte vdimms are stable its stable at 2.8 and lower and the ram im using has been tested in a P4C800-E with the vdimm mod at 3.1 at 290 1:1 3 4 4 8 prime stable so yeah it aint the ram, but it has stablelised my vdimm etc.
I cant be stuffed removing the mobo from the prommy i guess i will have to do with 2.8v for the mo. Thanks anyway
My Vtt is 1.3v and my Vmem is at 3.1 and I can boot/operate, but I am only at 232 fsb.
Have you tried using 3.1v for Vmem at a lower fsb like 230-235 to see if your system is stable???
I run my system at 272 prime stable 1:1 at 3 4 4 8 at 2.8 vmem when i increase to 2.9 its unstable :stick: meaning the removing the mc64 didnt do jack forme :( maybe cause im using xms pc4400 but i have tested it in a vmem volt modded p4c800 and it works fine at 2.9 at that speed primestable, so as u can see its the board, i think i must do the vtt mod to get it stable, the mods that catch performed on his board, and i seriously cant be stuffed taking the board outa the prommy :( maybe when i get my a64 rig :pQuote:
Originally posted by Ace-a-Rue
I quite don't understand. Up to what FSB are you good to?
My Vtt is 1.3v and my Vmem is at 3.1 and I can boot/operate, but I am only at 232 fsb.
Have you tried using 3.1v for Vmem at a lower fsb like 230-235 to see if your system is stable???
Personally, I don't see how you could run 1:1 at 290 on the Asus P4C800-E. That appears to be an impossibility. You must of meant 5:4!! Right!
Memory that works on one board at "X" fsb doesn't mean it will work on the competition at the same fsb. Corsair specifically test their memory on the Asus boards but I don't think they do on Abit. Maybe they do now but about a year ago they were not....
dude thast at 3.1 vdimm? and a 2.4c in my friend rig with my ram, the ram is rated at 277 at 2.75 vdimm at 3448 and im running at 272 atm cause thast the max oc of my cpu (prime stable) it can do 280 prime stable at 2.9 and needs 3.1 to get 290 prime stable, what is so hard to believe? people are doing 299 prime stable at 2.5 3 3 5 at 3.1 with pc 4000 ocz el modules, is that so hard to believe?Quote:
Originally posted by Ace-a-Rue
Personally, I don't see how you could run 1:1 at 290 on the Asus P4C800-E. That appears to be an impossibility. You must of meant 5:4!! Right!
Memory that works on one board at "X" fsb doesn't mean it will work on the competition at the same fsb. Corsair specifically test their memory on the Asus boards but I don't think they do on Abit. Maybe they do now but about a year ago they were not....
1/1 is easier than 5/4 if you use 3-4-8-8 ddr. 5/4 craps out at 295fsb or so. 1/1 no idea but i've had it up to 293fsb 2.5-4-7-7 You were only supposed to remove that one mn64 cap if your vdd was fluctuating like mad. For most people they never had a vdd fluctuation issue and it wasn't needed. Only reason i removed it was to put a 2k ohm vario in it's place to increase vdd to 3.5v or so. If you run at 2.9v+ you really need the vtt mod. It absolutely rocks. I'm curious what that 4400 ddr would do on your mobo with vtt fixed.
acu-a-rue it's not just Memory that works on one board at "X" fsb doesn't mean it will work on the competition at the same fsb. That's also true for the same mobo brand and model as well. I've owned 2 ic7's and 2 ic7max3's. All were quite different and one of them would only do 205fsb max. I returned that sucker the same day btw. It was a ic7max3. But my best mobo is my other ic7max3. Very interesting indeed. Did i hear someone say Quality Control?
Oh and let's stop whining about Vcore undervolting or whatever you wanna call it. Lemme give you an example of 2 of my mobos and what voltages are required to achieve a good o/c.
1st mobo
biosVcore---actual Vcore cpu and o/c
1.525----------1.471------2.4@2.4G
1.525----------1.471------2.4@3.6G
2nd mobo
biosVcore---actual Vcore cpu and o/c
1.525----------1.550------2.4@2.4G
1.725----------1.820------2.4@3.6G
Now both mobos were abit ic7's. The one that undervolted did not need an increase in Vcore to for my 2.4 to run at 3.6G however the mobo that overvolted i had to raise to 1.725 to get my 2.4 up to 3.6G. OK what does this tell us? It's all about total watts. The first mobo put out more current than the second so Vcore didn't need to be increased. 2nd mobo wasn't putting out close to enough current and needed Vcore increse. All mobos are different. I usually have better luck with the mobos that undervolt a bit. I prefer the extra current. But just because it undervolts doesn't mean it's putting out more current. I just know that some of mine have. Just use whatever Vcore works and don't worry about undervolting unless it's an Asus mobo then start worrying. :)
I think i might do the VTT mod i really dont need the vdd mod cause 3.2 is enough for me atm, but 3.2 makes my ram unstable i guess cause the vtt is at 1.35 which is very gay, I just need to remove the board from my prommy which i seriously dont have time for lol.Quote:
Originally posted by CATCH22ATPLAY
1/1 is easier than 5/4 if you use 3-4-8-8 ddr. 5/4 craps out at 295fsb or so. 1/1 no idea but i've had it up to 293fsb 2.5-4-7-7 You were only supposed to remove that one mn64 cap if your vdd was fluctuating like mad. For most people they never had a vdd fluctuation issue and it wasn't needed. Only reason i removed it was to put a 2k ohm vario in it's place to increase vdd to 3.5v or so. If you run at 2.9v+ you really need the vtt mod. It absolutely rocks. I'm curious what that 4400 ddr would do on your mobo with vtt fixed.
acu-a-rue it's not just Memory that works on one board at "X" fsb doesn't mean it will work on the competition at the same fsb. That's also true for the same mobo brand and model as well. I've owned 2 ic7's and 2 ic7max3's. All were quite different and one of them would only do 205fsb max. I returned that sucker the same day btw. It was a ic7max3. But my best mobo is my other ic7max3. Very interesting indeed. Did i hear someone say Quality Control?
What was hard to believe was the 1:1 ratio at 290 or there abouts....that is all.Quote:
Originally posted by Sanousie
what is so hard to believe? people are doing 299 prime stable at 2.5 3 3 5 at 3.1 with pc 4000 ocz el modules, is that so hard to believe?
Catch, that's a big pill to swallow:) I look at 295 1:1 as really stressing, straining the memory and 5:4 should relieve the load on it. Crapping out 5:4 at 295 sounds more like the memory modules along with the bios code not working together than just strictly the memory.Quote:
Originally posted by CATCH22ATPLAY
1/1 is easier than 5/4 if you use 3-4-8-8 ddr. 5/4 craps out at 295fsb or so.
Now, this I dig!;)Quote:
acu-a-rue it's not just Memory that works on one board at "X" fsb doesn't mean it will work on the competition at the same fsb. That's also true for the same mobo brand and model as well. I've owned 2 ic7's and 2 ic7max3's. All were quite different and one of them would only do 205fsb max. I returned that sucker the same day btw. It was a ic7max3. But my best mobo is my other ic7max3. Very interesting indeed. Did i hear someone say Quality Control?
Personally i think it's a chipset issue. But it could be the bios as well. All 865 and 875 mobos have this problem. Everyone is having problems running 5/4 over 295. 5/4 is actually a lot more stressful than 1/1. Well if the 1/1 mem is relaxed timing stuff which they are. Strange thing is when you use relaxed timing ddr in 5/4 mode it either doesn't work at all or it just doesn't work very well or not as well as you'd think. I think if theese mobo makers wanted to they could make/fix a bios to make 5/4 work better. But since mobo manufacturers are in competition with each other they are gonna program thier bios to outscore everyone else when you run your fsb at default speed. They set the bios to run extremely fast with 1/1 5/4 and 3/2 settings. So i think they could relax some settings. But they won't do it. There are about 20 different ddr settings btw. More than half of which are hidden and we can't change.
I had a friend of mine who bought OCZ PC4000 Gold memory to use on his MSI 875 chipset board at 5:4. He found out that it wouldn't work at 5:4 ratio at all! He sends the memory to me to test on my Asus 865 chipset board. It works just fine on my Asus 865 board. He then gets an Asus 875 chipset board and the OCZ PC4000 works just fine on the Asus 875 m/b at 5:4 up to about 270+ fsb. He couldn't go any higher than that at any ratio. We have the same 875 chipsets where the same sticks work on the Asus 875 board at 5:4 but not on the MSI 875 board at 5:4. There is no difference other than bios code controlling the two chipsets. Sure, chipsets can deny some memory from working on a particular board but the majority of the issues with memory are caused, in my assesstment, by the bios code.
I'll do the vtt mod, in the CATCH22ATPLAY way, i have read the whole thread 3 times, i now have the whole idea of what i going to do, but i just had i pair of questions, ( yeah i know the answers must be somewhere on this thread but i just can´t find them... )
I have a max3 already with the mc64 taken off.
1.- I understand that when i do the vtt mod in CATCH22ATPLAY way i will no longer able tu use less than 2.9 volts on my board?
2.- I understand that i can measure the real vtt value putting one end of my multimeter on the lower pin of the upper right mosfet, and the other end of the multimeter to ground, so the question is where is ground?
3.- so the vdimm voltage that the bios report after the mod its still correct? right?
4.- i understand the i have to use a 1k VR trimmer, and how many watts does it need to be?
thx and excuse my bad english.
pls help me!!
i kwon that to measure the vtt i put one end of the multimeter to the lower pin of the mosfet but where that i put the other end?
pls pls
Put the black probe to any place on the case.Quote:
Originally posted by dios
pls help me!!
i kwon that to measure the vtt i put one end of the multimeter to the lower pin of the mosfet but where that i put the other end?
pls pls
I've read the whole thread & understand most of it but there's one thing I have yet to see.
I wanna do a Vmem mod on my Max3, 3.2v just doesn't cut for my XMS3500. I've been able to run my BH5 at 231mhz 1/1@3.2v but know that it can handle more at 3.3v-3.4v.
I remember reading somewhere that to do a Vmem mod on the Max3, you have to solder a VR to where the MC64 used to be. Am I right?
I'll be doing the VTT mod as well but would like someone to help clarify what needs to be done to mod the vDimm on the Max3.
Is it similar to modding the IC7-G? Just don't wanna fark it up...
I read hipro5's modding guide as well but I assumne that it's mainly for IC7-G & not the Max3.
Can anyone who has modded the Max3 verify these things for me?
TIA
Minnyboy
thanks for clarifying this for me:rolleyes:
I think I'll try & clarify it myself as I did in another post.
Do the mod the same as the IC7 Vmem mod & only use up to 2.8v through the bios & 2.9v & above through the trimmer.
I assume I'm right or has everybody left this IC7 series Vmem mod....
Hello to all, i'm an italian boy who like very much computers. Last month, i bought a ic7-max3 mobo and a p4 3.0. I've looked at hipro5 "motherboard modding guide" for ic7 family mobo,and so, i've modded my ic7 max3, but i haven't done Vdd mod. When i've powered on the pc nothing appears... no beep, non sound, no video... Why? I've used 500ohm 25 turns trimmer and 10ohm resistor smd. Help me, please.
Thank you for your interess
P.s scuse me fo my bad english
ok i do the vtt mod on the cacht22atplay way and it is working awesome just now, when i set the vdim at 3.0 volts, the vtt measure at the mosfet reads 1.499 just awesome!!!
i know can set my mushkins lvll at 232 2-2-2-5@3.0 volts, my 3.2c is flying high!!
Minnyboy yes where mc64 was stick a vario in it's place. Try a 5k ohm vario or maybe a 2k ohm. I can't be bothered to look at mine atm.
Minnyboy, I put a 5K, set at around 3k accross MC64 pads for vDimm. Just be sure you are set to 2.9vDimm when you do this. It made the 2.9V read 3.25v (with a meter) with that value, you'll also want to make sure your 3.3V rail is set high enough to handle the extra vDimm range.
Thanks Catch22 & mikead_99,
Might just skip the Max3 altoghether & get meself a new IC7-G.
Didn't realise it until today but it took out my Antec 550w PSU too (the one in my sig:( )
Was at 3.4v for my Vdimm on my IC7-G with the mods to my PSU, I'll definitely be doing the same but this time it'll give me the chance to get the VTT done as well.
$ucks hard when you have to dissamble so much $hit to get a simple mod done...
Better still, now that I got the knowledge for the Vdimm mod for the Max3, I'll mod both boards.
Good thing I got meself 4 sticks of BH5 to make use of the extra volts :D
Cheers:toast: ,
Minnyboy
Apologies for the double post but:
I just tried to do a VTT mod on my dead IC7-G as a test bed for this VTT mod.
The thing I'm worried about is this:
I cut the trace at the back of the mobo for the VTT mod as well as getting a wire snipper to take off the MC50. The minor problem I'm facing at the moment is that when I use my DMM to measure the Ohms, I'm getting 600 MegaOhms. Is this withing range or did I do something wrong here??
Is it within range?
Could Catch22 or another member please clarify this for me??
I'm thinking that it's withing range but need to be 100% sure.
TIA,
Minh
The reading sounds fine. Just about an open circuit there or as close as you're likely to get. Practice went well i'd say.
Yeap, modded the Catch22@play WAY!!!Quote:
Originally posted by CATCH22ATPLAY
The reading sounds fine. Just about an open circuit there or as close as you're likely to get. Practice went well i'd say.
Another one for the BH5 DDR500 2-5-2-2!!! W/out the VTT mod, I could only get it to DDR470/480 Dual Channel @ 3.4v....Now it's doing that magical mark:banana: :banana:
Memtest86+ results:
100 x test 5
100 x test 6
50 x test 3
7+ hours all tests w/out any faults
Now I gotta test all my other sticks of BH5:D :D :D
Thanks Catch22
I have a silly newb question. I seems that I read a post from Catch somewhere discussing the issue of the power supply as it related to the vtt & vmem/vdimm mod. Now as I recall, I walked away from that post with the impression ( or a drawn conclusion) that supplying 3.3 volts to this circuit was insufficient, as there was too much voltage drop from the regulating/peripheral components to allow proper regulation of the circuits, and that upping the PS voltage on the 3.3 rail to something like 3.47 would assist matters.
Now, as I said, silly newb question. ( here it comes)
Would it not be more effective to supply the affected circuitry with a seperate source of say 3.5v? Thereby bypasing the regulation/drop issue?
Just a thought.