Printable View
this is great! However, I can hardly tell what is in the pics. Maybe someone can help you take pics of your board. Also, if you're changing it around, then I think I will wait till you're done your final design. But man, that is some awesome results. Keep it up!
Thanks and like i said my webcam just doesn't cut it. I've tried quite a few digicams at fryes and compusa. But they all seems to suck at closeups. I can however get some batteries and use this webcam to take picks remontely. It'll do higher res that way. But then i don't have an LCD on it and i won't be able to tell if the lighting is good or not. I'd probably just be wasting my time. Gonna take someone else with a better cam who can understand what i'm saying and do the mod and take pics. I don't think i'll be spending 2G on a decent digi cam. Hm wonder if i can get ABIT to send me one just to shut me up? :)
You gotta use macro mode when shooting that close, man... ;)Quote:
Originally posted by CATCH22ATPLAY
Thanks and like i said my webcam just doesn't cut it. I've tried quite a few digicams at fryes and compusa. But they all seems to suck at closeups. I can however get some batteries and use this webcam to take picks remontely. It'll do higher res that way. But then i don't have an LCD on it and i won't be able to tell if the lighting is good or not. I'd probably just be wasting my time. Gonna take someone else with a better cam who can understand what i'm saying and do the mod and take pics. I don't think i'll be spending 2G on a decent digi cam. Hm wonder if i can get ABIT to send me one just to shut me up? :)
But anyway, good work! Let's hope this can get to Abit so the rest of us don't have to void our warranties.
Er macro? I didn't see an option for that. Hmm lemme check it out. And yes i'd rather have ABIT take care of it too. Just because i figured out how to do it on my semi dead IC7 doesn't mean i will do it to my max3.
CATCH22ATPLAY
Let me know when you get this mod finalised and i will do it to my Max3.I will also then take pics for you of the mod finished.
For now what pics do you want of the board as i could take them and link to them so you can photoshop them up with what to cut/change etc?
have a look here and see if any of these pics help you
Take a pic of the same areas i was showing. The trace on backside of mobo. The upper right mosfets. The area around the winbond chip especially MC50. But also R50 and MC64 so i can show both VDD and VTT at once. The closer the better for all pics. But also some farther away shots like my last ones would help too. Thanks for the offering too. Can't abit figure this stuff out? Geez it isn't that damn hard. I may have to do some more testing because my math didn't seem to work correctly for some reason. It should look like this. First set VDD to 2.80 in the BIOS.
V out = V in * [R2/(R1+R2)] then get difference
where R1 = the fixed resistor of 500 ohms
where R2 = the Vario which i've set at 2,500 ohms
math should look like this
V out = 1.4 * [2500/(500+2500)]
V out = 1.17 get difference
difference = 1.40 - 1.17 = 0.23 volts
Now using that equation we see that VTT has dropped to 1.17 only to the windond chip. Winbond will try to correct it. It dropped 0.23 volts. So winbond will increase it 0.23 volts. Final reading should be 1.40 at the winbond chip and 1.63 real volts at the mosfets. AN alternate way to do it is like this.
V out = V in * {1+[R1/(R1+R2)]}
so it would look like this
V out = 1.4 * {1+[500/(500+2500)]}
V out = 1.63
AH i think i like the second way better :) Although the first is more correct to me anyways. Mainly because i know we're tricking the winbond chip by making it believe it's geting less volts. Also because the math didn't work and it should i think i know what happened. I'll check into it :)
I added a few more pics to work from.if I can i will try and clean the back of the board and get a high res scan of it.The pic will be huge though
If all goes well i really hope Abit actually implements this fix.
I got some bad news though. Abit added components to the VDD side. So for us overclockers my mod works fine for if you set VDD to 2.90 volts or above. I can only make VTT worse for 2.80 and below. Here's what i get when i take reading from my non modded Ic7MAX3
Bios settings--WinbondVdd--ActualVDD--WinbondVTT--ActualVTT
---3.2v-------------2.827-----------3.279--------1.409----------1.412
---3.1v-------------2.726-----------3.164--------1.359----------1.362
---3.0v-------------2.662-----------3.106--------1.334----------1.337
---2.90-------------2.575-----------2.988--------1.283----------1.286
---2.80-------------2.826-----------2.837--------1.409----------1.413
---2.70-------------2.727-----------2.740--------1.359----------1.363
---2.65-------------2.678-----------2.690--------1.334----------1.338
---2.60-------------2.628-----------2.640--------1.309----------1.313
---2.55-------------2.577-----------2.589--------1.283----------1.288
---2.50-------------2.527-----------2.538--------1.259----------1.262
No if i use say a 2500 ohm and 500 ohms resistor and i do the math it would look like this.
where R1 = the fixed resistor of 500 ohms
where R2 = the Vario which i've set at 2,500 ohms
V out = WinbondVTT * {1+[R1/(R1+R2)]}
so it would look like this
V out = WinbondVtt * {1+[500/(500+2500)]}
V out = ActualVTT
So the new table would look like this using the 500 ohm and 2500 ohm resistors.
Bios settings--WinbondVdd--ActualVDD--WinbondVTT--ActualVTT
---3.2v-------------2.827-----------3.279--------1.409----------1.644
---3.1v-------------2.726-----------3.164--------1.359----------1.586
---3.0v-------------2.662-----------3.106--------1.334----------1.556
---2.90-------------2.575-----------2.988--------1.283----------1.497
---2.80-------------2.826-----------2.837--------1.409----------1.644
---2.70-------------2.727-----------2.740--------1.359----------1.586
---2.65-------------2.678-----------2.690--------1.334----------1.556
---2.60-------------2.628-----------2.640--------1.309----------1.527
---2.55-------------2.577-----------2.589--------1.283----------1.497
---2.50-------------2.527-----------2.538--------1.259----------1.469
So any setting 2.80 or below is now messed up. However all settings 2.90 and above track perfectly. A comprimise could be reached however. More like splitting the difference. Let's try some different values here.
R1 = the fixed resistor of 500 ohms
R2 = the 5k Vario which i've set at 5,000 ohms
V out = WinbondVTT * {1+[R1/(R1+R2)]}
so it would look like this
V out = WinbondVtt * {1+[500/(500+5,000)]}
V out = ActualVTT
Bios settings--WinbondVdd--ActualVDD--WinbondVTT--ActualVTT
---3.2v-------------2.827-----------3.279--------1.409----------1.537
---3.1v-------------2.726-----------3.164--------1.359----------1.483
---3.0v-------------2.662-----------3.106--------1.334----------1.455
---2.90-------------2.575-----------2.988--------1.283----------1.400
---2.80-------------2.826-----------2.837--------1.409----------1.537
---2.70-------------2.727-----------2.740--------1.359----------1.483
---2.65-------------2.678-----------2.690--------1.334----------1.455
---2.60-------------2.628-----------2.640--------1.309----------1.428
---2.55-------------2.577-----------2.589--------1.283----------1.400
---2.50-------------2.527-----------2.538--------1.259----------1.373
Geez that looks almost as bad as ABit's original way of doing it. I run at 2.90 VDD and above. So i'll be using the 500 ohm and 2,500 ohm resistors. VTT can however be fixed correctly. But it will take a lot more than just 2 resistors to make it perfect at all voltages. I can actually probably make it track perfect using 4 resistors. But i've fried enough hardware for a while.
I might have to try all this..i can just imagine what i could do with a fixed VDD..this is what a acheived just after the volt modd..:>)
http://home.comcast.net/~xgwar/read-outs_after_modd.jpg
not bad not bad at all
im probably gonna have to do these mods once i get some ram good enough to need em. im gettin mushkin black level II
WOW that's pretty damn good. Gwar what type of ram dude? It pretty much ties my A-data at 3-4-4-8 at 290 6833/6743. It runs a faster timings. But doesn't help enough to warrant stability issues. My best was FSB@305 and my mushy pc3200L2 black in 5/4 mode cas2-2-2-5 7xxx/7xxx. But the mushy was on my first IC7 non max3. The A-DATA was on my MAX3. My mushy doesn't like my MAX3 at all. :(
OK screw it i'm going offline now and gonna mod this MAX3 for:
VDD=3.28
VTT=1.64
My goal is 260 1/1 with my corsair pc3500 ver1.1 bh-5 sticks cas 2-2-2-5. Need that for my 3.2 benching. But i'll try the mushy again and see what's up.
Thanks Catch..:) i love this new power im getting now after the volt cap was removed, i can now run with alot lower specs on my adata pc4000.."NEW" high..!!
http://home.comcast.net/~xgwar/finall_results11.JPG
OK so i'm not the only one with A-DATA. I like the stuff. BTW try 3-4-4-8. It's more stable and sandra bench only drops maybe 50 points. Some people think score may get wores lowering to 2.5-3-3-7. But i think they're wrong. It just doesn't help much.
Ok my mushy is working in my max3 now. It would only do 226-228 on this mobo. It used to do 247 on my non max3. After doing the VTT mod it's running at 252 cas2-2-2-5 streetracer cpc enabled. 100% stable speed as i'm typing this is 250 cas2-2-2-5 F1 cpc disabled.
ok gonna try this next :)
VDD=3.4
VTT=1.70
Then this :)
VDD=3.5
VTT=1.75
er then this haha :)
VDD=3.6
VTT=1.8
Mushy don't die on me please. Oh i removed MC64 and added a 5k ohm resistor from bottom of where MC64 was to ground via that 5k ohm resistor. Dunno what max volts this mobo can put out. But i'm willing to try A LOT!!!
BigToe i'll work on those pics when i got time. I'm good at hardware. But software and Photoshop are beyond me. But i can draw lines and arrows etc etc er sort of. hehe
OK Mushy pc3200L2black is up a bit more after increasing VDD with my VDD mod and VTT with my VTT mod.
258cas2-2-2-5 auto cpc disabled
251cas2-2-2-5 Street racer cpc enabled and damn stable now too
Can't wait for VTT mod and VMOD to be finalized and released to "public" so that I can improve my memory performance which craps out at 260fsb (1:1) on IC7, ocz 4200el. I'm assuming that a 3.2V with a nice 1.6V VTT will let it o/c reasonabliy higher =)
woohoo the results are looking nice.
keep up the good work
BTW when do you think the mod will be finalized
Actually i thought the mod was finalised. But you're right it really isn't. Like i said earlier i'm not photoshop user. So it may take me abit to draw on BigToe's pics. But i will do it.
OK just to keep a few people salivating here's a quick pic with mushy and fsb at 251 cas2-2-2-5 street racer cpc enabled enjoy
http://pages.prodigy.net/catch22atplay/251.jpg
BTW i updated pics etc on page 1 for VDD/VTT mod :)
Have you removed MC64 instead of R50 for the VDDR mod?Quote:
Also if you remove MC64 it really helps VDD mod a lot
Hm i guess i didn't update written instructions well enough. Yes i removed MC64 and MC50 both. The max3 has a 700 ohm resistor for R50. That stays. If you want to increase VDD use a 5k ohm vario in the place of MC64 or bottom of MC64 to ground. Set the vario at 5k to start.
Im gonna be doin this mod tommorow and wanted to clear a few things up for myself if you dont mind. The only mod necessary for the vtt is the cutting of the trace, bringing a wire from the bottom leg of the mosfet inline with a 500 0hm pot and then soldered to the mc 50? Your mod icludes besides the removing of the mc64 to increas vdd, you include a mod to get even more voltage out of the vdd? Thanks for the mod i lost my other account here, been hangin for a while. I really appreciate the work you put into this mod, thanks, and thanks for the help
Just make sure you set the 500 ohm pot to under 390 ohms. 320 ohms was close to perfect for me. 390 ohms or higher and it may not boot and volts might freak out a bit. Oh and don't forget to add the 2k ohm pot from first resistors MC50 side to ground. Set it at 2k ohms.
ok i think im clear, or not. So in addition to the 500 ohm pot on mc50, you also need a 2k ohm pot from the same pad(on the pot) that you soldered the 500 ohm pot, ran to ground?
so it goes - left leg on mc50 soldered to 500 ohm pot, with the other lead going to the upper right mosfet. 2k ohm pot wired to the 500 ohm pot where the mc50 lead is soldered, and the other end to ground? lmk if this is right, very nice work indeed. ill post some screenies when my system is done, all my hardware cept cpu is coming today.
would it be possible for me to use smd grabbers to do this mod?
if so what size do you think would work best