Hi, I'd like to raise the 5v and 12v lines on my Antec 430w TruePower, does anyone know how to go about doing this? I haven't found any obvious potentiometers when opening it up. thx!
rms
rsquires@flash.net
Printable View
Hi, I'd like to raise the 5v and 12v lines on my Antec 430w TruePower, does anyone know how to go about doing this? I haven't found any obvious potentiometers when opening it up. thx!
rms
rsquires@flash.net
i thougt its on the back side of the psu...
there are no pots on the antec truepowers...
My truepower is a good unit, but I'm bummed that it has no trim pots to tweak the output. Does anyone have links to forums that talk about PSU tweaking or that give model numbers that are adjustable? thx!
rms
rsquires@flash.net
Ya, Im curious about this too as my rails are a bit low at 4.9 and 11.9. :(
Antec True480 over here, and I'm curious too. I'll post if I find any info but so far I haven't had much luck in my search :(
Its very easy... there are sensor cables on your atx connector, you have to cut them and put rezistors over there, ill post some diagram later.. its very easy and effective
That makes so much sense, and soo much easier than opening up my PSU :)
Could you identify which pins are sense?
http://www.fury-tech.com/images/user...onn_atx2.1.gif
hoho , i 'm waiting with impatience berkut response :D :toast:
ok...
no blue prints, ill just tell you how to do it ;]
on your atx connector cable are high power 5V, 3.3V and 12V cables and one of these cables (one of them) will be doubled, one will be very thick and the second one will be thin... the thin one is a monitoring cable, you have to buy a high power resistor which can be regulated, dunno the needed resisstance.. Now you cut the signal cable, set the resistor to 0ohm's and solder it there... than start your computer in the hardware sensors page and start increasing the resistance... VERY SLOWLY... this should work but if it doesent ill post some more info... ok, i gotta get some sleep...
We need more info. The wire sizes are all the same, and this is too important to make stupid guesses on.
rms
As far as I understand, and what i'v seen , U have 1 thick and one thin wire for 3.3V , 12V and 5V :D
I made that for ppl who don't really know the colour, but we still need the Power/Dimensions of the variators :)
Have sweet dreams berkut but come soon for us :taost:
http://membres.lycos.fr/xigfrid1/for...Antec_Vmod.JPG
Yea, your blueprint is correct
The question here is what value and wattage rating to try for the series resistors placed in the sense lines. If you assume a .4v drop across the resistor (assuming they just do a simple voltage drop reading), and .1mA current (who knows what's correct) in the sense line, that gives a value of 4kohms.
The power consumed in this case is negligible, so if all this is correct a standard 10turn 5kohm trim pot should do the trick. So what values are people using?
rms
rsquires@flash.net
The ATX 1,2 spec has a lot of info:
http://www.formfactors.org/developer...x12vPSDGV1.pdf
The only mention of sense line was on 3.3v though:
I don't really know how you would determine what resistance or wattage to use. :(Quote:
The +3.3 VDC output should have provisions for remote sensing to compensate for excessive cable drops. The default sense should be connected to pin 11 of the main power connector. The power supply should draw no more than 10 mA through the remote sense line to keep DC offset voltages to a minimum.
well i'm considering to get 3 10turns variators of 100ohms or 1kohm (the lower the sharper you will regulate the rail)
btw, i think that all 10turns variators get about the same wattage tolerance (i hope so)
anyone who did the mod. can confirm ?
I cut my 3.3V sense wire and soldered a 10ohm fixed resistor there (I tried w/ 220ohms first but PSU didn't like about that idea :D). Then I grounded this 10ohm w/ 1kohm VR.
So now the 3.3V can be adjusted by lowering the 1kohm value.
Pic
Thx macci, i ll try it as soon as i ll have enough time :D
thx for all others who helped here.
Any advises for the resistor value for the 5V rail ?
Regards.
Xigfrid
Very interesting indeed.... see sig ;)
Ok, I'd like to avoid having a separate pulldown resistor, and just use a single inline resistor. Has anyone tried this? I'd imagine its effectiveness would depend on the impedance of the voltage sensing circuitry, and how much current is flowing in the sense line.
rms
inline resitor would not work properly : you need a voltage lowering, that can be done by 2 impedances ( though, u can consider to use only 1 variator, all 3 legs connected as below :
1 => ground
2 => to PSU thin line
3 => voltage rail you must fix (thin line)
Btw , i will avoid any trouble by applying 1 impedance of 62 ohms to 3) then a variator used as single variable impedance on 2)
I think PSU need at least a little current to work properly that the variator would not be able to feed
Actually something like 10ohm fixed with 1k VR is better for that 3.3V Vsen. The higher the fixed resistance is set the more the voltage fluctuates for some reason (200ohms was way too high and 60ohms is also a bit too high).
How are you people physically arranging the pots and resistors on the cable? Having 6 resistors and pots hanging off the power cable has got to be a godawful mess. I'd like some tips on making this mod a little more aesthetically acceptable!
rms
rsquires@flash.net
Hehe , thx to all !
I ve done the 3.3V mod only and now i'm getting Vdimm rock stable on a NF7-s rev2.0 and reaching few more Mhz on FSB :D
I did use a 15 ohms resistance + 1K var. as macci suggested
It seems to me that on the nf7-s anyway, that the 3.3v and 5v are the most important ones.
3.3v because I've noticed after doing a Vdimm vmod that I can't get beyond about 3.2v, and I figure this is because the memory voltage regulator is hooked up to 3.3v.
5v because I've read that the Radeon videocards use 5v for their main power, and that raising this made a large difference in the overclockability of the card.
12v doesn't seem useful to me. I figure they resorted to using this mainly to relieve load on the 5v lines for power to the cpu.
rms
i didn't mod yet the 5V, but for the moment i tried :
15ohms + 1K var on 3.3V i love this :D
10 ohms + 2k var. on 12V rail => variator going too hot and Vdimm unstable like hell
56 ohms + 10k var on 12V rail => seems better and 12V rail is stable , but Vdimm unstable upper than 3.2V :/
I had to decrease AGP voltage when i did up the 3.3V rail, now i 'm standing at 3.4V seems ok
Thx for all contribution ;)
One thing to be careful about when overvolting. Apparently Radeon cards have no thermal protection against overvolted rails, so they can get very hot and I've seen reports of failure due to this. Monitor card temps carefully!
rms
does this also work with the antec 550W? I would suppose it does...
I have a really weak 5v (it´s standing at 4.89) and 12v (currently at 11.67) so the 5v mod would be really apreciated guys.
Can you put some pics of the 3.3 mod that is already done?
Thanks in advance.
awesome mod DOods!! time to pick up some vr's my 3.3 is at 3.24 this could really help me out. thanks a bunch!
Now what would be potential downfall of having ground involved in sense line with resistance in between? Stability? Fluctuaction under different load?
I dont quite follow your diagram macci. Are you soldering the fixed res to the think line, then fixed to vr and other end of this line?...kinda like a "T- Section" ?
Thx
here some pics of the connections I made :
http://membres.lycos.fr/xigfrid1/for...W/mod_alim.jpg
and here the final result.
http://membres.lycos.fr/xigfrid1/for...W/mod-PSU2.JPG
Do you think this also works with an antec 550W?
Yes Golias...it will. I just did it to my TruePower550 and will also do it for the 5v and 12v rails since they all have the sense lines connected to the ATX connector.
I will post pics soon when I am done.
Right now I am holding steady at 3.4 for my 3.3 rail.
I recommend doing it around half way up the chord bundle as it makes for easier adjustment to the rails. Or you can do what I am doing and add the fixed resistor, then add a wire so that you can add the vr and glue it to the crossbar at the top of most cases...very easy to to get to and adjust.
thank you for your reply, i really have to do the mods to the 5v ans 12v rails. They are really weak on the bios reading.
My epox 8rda+ reads the 3.3v has being the vagp, therefore i can´t find out what my 3.3 rails stands at the moment.
So what is the best fixed resistance for the 12v mod?
And the VR should be ????
Best Regards
Just finished up my 5v and 12v rails. Its easy as pie on the Antec 550.
Getting 12.46 and 5.45 now.
use a 60 or so ohm fixed resistor, then connect a 10k 15 turn VR to that...at the top of the fixed resistor...as in Xigfrid's picture.
make sure the VR is turned all the way up to 10k ohms before soldering it to the fixed resistor. Then just turn the vr clockwise to lower the resistance and raise the voltage.
Perfect!
Ahhhhh shucks Golias. :explode:
Dont be like that...:toast:
i´m gonna try it, then i´ll post the results.
Good luck.
If you have any questions before you start the mod, reply here and I will monitor this thread to see if you need any pointers.
Especially since we use the same psu.
Gonna do it over weekend on my true 550. Now, what are the wattage req for those resistors? I don't think it would be too high but would like to make sure before I burn anything.
For easy adjusting, I used a 68ohm fixed and a 10k 15 turn per rail.
You can use a 20k VR alone if you like....just be very careful when you start adjusting as you dont have the a fixed resistor to add some resistance if ya go to high.
Can somebody post some pictures maybe, of how to do the mod? I never modded a psu before, but my lines are really low. Maybe someone can give a list of what I need to do the mod.
You need to state what psu you are using Chris. :hehe:
Oops :rolleyes: I have the truepower480
But I'm maybe going to sell this one and buy a truecontrol550, does somebody know how much you can adjust the rails with the front bay it has?
It's supposed to be adjustable to -5% and +5%
Not sure actually Chris.....do a search for the TControl550 here and see what ya come up with.
Also, if ya look at long threads in the Overclocking forum, you may see someone has it listed in the SIG....just PM them and ask what they are getting.
Modding hte TP480n should be pretty much like doint what I did with my 550.
Can ya send a pic of it,,,unless you are gonna grab the TC550, then dont bother obviously. :hehe:
I ordered the truecontrol, I could sell the 480 for a good price so this is a bit easier ;) I would have like to mod it though, but I'm not sure if I can do it, and I don't want to trash this psu :p:
Truecontrol sucks... its good PSU but adjustable rail right now is maxed at 12.1 (which I am okay with) but... 4.97v and 3.26v under MBM? gimme a break. And to top it off, the control uses 2 1k vars and 1 .5k var. With 0 ohm being the maximum setup. (so you can't modifiy this easily by just swapping them)Quote:
Originally posted by Chris85
I ordered the truecontrol, I could sell the 480 for a good price so this is a bit easier ;) I would have like to mod it though, but I'm not sure if I can do it, and I don't want to trash this psu :p:
Yeah I bought mine yesterday too and plan to return it as soon as I get my PC&P -_-;
heheh , some more works on this Antec TP 430 W :D
here my new recommandation to get better Rails' stabilisation :
U 'll need to cut a part of the 92 mm sucking fan to allow it to cold the heatsink that isn't in the normal airflow.
I'm sory i don't have nor a webcam , nor a camera for pictures, so i went as usual, with the hand, your imagination will help a lot ;)
http://membres.lycos.fr/xigfrid1/for...od_ventilo.JPG
Upon forther research, the TControl550 does indeed suck balls.
Looks like a marketing scheme to me! I would go with the standard Antec vmod for your psu. You should have a sense wire for all 3 rails running down the length of the ATX connector.
You can always PM or email me if you have any questions. If possible, send that damn TC550 back and get a refund...buy either the TPower550 (its hella cheaper than than the TC550), or the TTGI that was reviewed by OPP.
Both are easily modded, and I think that after taking the cover off the TTGI there are actually installed pots to tweak!
A third option is to check out PC Power and Cooling's web site.
I recently dumped my Antec TP 430 for a PCP&C Turbocool ATX 510. Rock solid supply with trimpots inside. I had them drill access holes in the case for the trimpots. I have not had to touch them. 1% regulation and a 5 year warranty.
I ask again...in total lostness.
What are the fixed resistor used in this mod?
those high AMP power resistors or regular 1/4w-1/2w resistor? TIA.
JINU117-----
You need to use a 68ohm fixed resistor...I dont think it matters which you use as in 1/4w or 1/2w, but I always use the 1/2w cause higher almost always is better.
Use the 68ohm fixed in series with a 10k VR.
sorry for the grave digging :)
http://members.iinet.net.au/~zzhang/antecmod.JPG
now where is it supposed to go? 1 or 2?! (I connected to position 1, it seems to work for me) or it doesnt matter?
You connect the fixed resistor, then connect the VR in position 1 according to your picture.Quote:
Originally posted by Ragnarok
sorry for the grave digging :)
http://members.iinet.net.au/~zzhang/antecmod.JPG
now where is it supposed to go? 1 or 2?! (I connected to position 1, it seems to work for me) or it doesnt matter?
The VR would be connected to the top leg of the fixed resistor, away from the ATX connector.
If the black rectangle in your picture is the fixed resistor, then yes, position 1 is the best place for the VR.
Sup ice ice.Quote:
Originally posted by pc ice
haha......Hëll ‡ Fîrë.......what's up buddy.......keep on modin........;)
lol...a moddin we will go a moddin we will go.....
Waiting on my grabbers to get here so I can redo the vdd. Also, found the data sheets for the ICs on my Ti4200..cant wait to vmod this thing and see if she breaks 16k or so.
worked good
now i have 3.4V...
w00t, FSB already looks better
http://members.iinet.net.au/~zzhang/antec1.jpg
http://members.iinet.net.au/~zzhang/antec2.jpg
http://members.iinet.net.au/~zzhang/antec3.jpg
http://members.iinet.net.au/~zzhang/antec4.jpg
Antec quality is a bit overrated, if u ask me it looks like a pile of poo the internals...
Nicely done Rag.
Keep an eye on yer 5v rail as well when upping vcore.
I did the mod.. Didn't see any difference at first, but when I was pushing the board the other day my Vddr got stuck on 3.23V. I looked at the Vio and saw it @ 3.28. I upped it to 3.45V and started benching again. After a few benchies checked voltages again and saw the Vddr @ 3.30V :eek: :D Whoopsie :p:
Gues the mod works like a charm then only it doesn't help me right now. Something else is holding the board back.. Stuck on 237MHz right now.. 240 is bootable but highly unstable. My Corsair Twinx needs 3.2V @ 220MHz so maybe I should get some better ram first..
pc ice,
Would you think modding the 12V rail would help getting 240 stable? Or would that only stabilize Vcore?
I cant find the problem m8.. Had Twinmos BH5 in the board yesterday..no luck. The ram was better but still the board crapped out at 240 (241 real).
Also..when I'm at say 7 x 245MHz the system boots perfectly but the screen is in 16 colors (or 256). Like it won't load the vga driver, Argghh :( This 240 thing is driving me crazy :D
I didn't mod the 12V yet because I think my PSU is max now.. Getting really hot.. It's and Antec TP clone 380W. 12V is dropping a little when on high Vcore. 5V is 4.95 as it always is.. 3.3V is 3.45. NB is flat and watercooled.
can any post actual pics of the mods?
Pics of the mods done are fine, I just need to see this myself.
also, heres what my antec true control does when maxed out.
the 3.3 volt line is actually lower then my vantec 400 watt, which comes at very strong rails at 3.5, 5.3, and 12.6.
but I've always used that PSU for power fans when benchmarking....
maybe time to give it another look ;)
So on the 12v rail it´s a 68ohm + 10k vr. What about on the 3.3 and on the 5v rails.Quote:
Originally posted by Hëll ‡ Fîrë
Nicely done Rag.
Keep an eye on yer 5v rail as well when upping vcore.
Bump
3.3 use 10ohm + 1K VR
output u get is Vout = (VR resistance)/ (VR resistance + 10) * Vin
any ideas how to mod psu that has no thin orange cable ? it is cheap 300w psu
I'd like to practise a lil' bit before I'll do mod to my true480
Is it possible to use a 10K or 1K VR and skip the fixed resistor for modding the 5V-rail? Its extremely low atm, 4.7V on molex and 4.3V reported in bios. If so what should I choose, 10K or 1K and how am i supposed to connect it? Just solder one connector to the 5V-sensorcable and the other connector to ground?
uggggg two dam local radio shacks and neither og them have any of what i need. Imagine that.
3.3v: 10 ohm fixed, 1K variable.
5v: ? (24 ohm fixed, 5K variable?)
12v: 68 ohm fixed, 10K variable.
A moddin' I shall go... 8-) :toast:
EDIT
Theres no 12v sense on my 400 watt Antec (generic) 8-(
strange i just bought one of these and it rocks, no vmods required all the rails are perfect.
Awesome PSU! i love how quiet my puter is using all me fans on them fan only headers :D
Does this mod apply to Sirtec High Power PSUs?
It applies to any PSU with sense wires to the ATX header.
My Antec holds 5v/3.3v/12.5v pretty well perfectly all the time, but I want more... hehe.
Go figure, PSU was fried :rolleyes: A capacitor was blown :D Gonna RMA it soon and report back if im going to Vmod it.
I got a TC550 today, gonna do the mod on it as well, its 3.3V adjustment just dont go high enough ..
What will happen if I use a 68ohm fixed and a 1K VR on the 3.3v line? Will anything explode :) or is will it fluctuate like crazy, or what? What about the 5v line, is 68/1K ok with that?
Also, I wanted to know... The fixed resistor only has two contact points, and the VR has three, of course. From what I understand, I connect the fixed inline with the 3.3v sense line, and then I choose one of the lines contact points on the fixed resistor and attach the VR. Then I ground the VR. The setup should look like this, yes?
Right on duck, but I would use a 10k for the 3.3 and 20-35k for the 5v.
Any reason (other than quicker & more responsive adjusting)? I just did my 3.3v and 5v, both with the 68/1K combo. Worked like a charm. The only problem is that it took forever to turn the damn 1K and get ANY sort of noticeable rise (talk about fine tuning :)). It did work just fine, though.
Anything I'm overlooking?
Lower ohm gives more stable rail, as was said earlier... although if 68k works, 68k works.
Yeah, that's why I asked about fluctation. So far, though, it's absolutely rock solid at 3.39v (BIOS reading). :) (and 5v is stable at 5.08v).Quote:
Originally posted by STEvil
Lower ohm gives more stable rail, as was said earlier... although if 68k works, 68k works.
:thumbsup:
hi guys,
i'm just wondering if i can just change the pot on the front panel of a tc550w?
Very nice OC !!! I think this is the best OC I've ever made. Right on the power source!!!! I'm gonna try with 10ohm to 60 ohm plus 5K ohm variable resistor.
Mine is HEC 475 watts true power ( I think the company is marketing this PSU under Enermax brand for US market ).:banana:
hi,
good idea this mod , but i've not understand how you can determinated the value of the resistor and the pot ;
3.3v=1k vr (pot) + 10 ohm (r)
5 v = 20k vr? (pot) + 68 ohm (r) ?
12v = 10k vr (pot ) + 68 ohm (r)
that's for the antec true power 430w , 480w & 550w .
the 5v value seems right ?
somebody could show me these formula with the correct value :
vout = vr/(vr+10)*vin
vout=? 3.3,5,or 12 ???
vr=?
why 10?
vin=?3.3,5 or 12???
wont need a 20vr or 68 ohm for the 5v.
5k and 30ohm would be about perfect probably.
thanks stevil for your reply , may be could you explain how you can find these value ? wath is the formula ?
kind regards ,tomati
well, if 3.3v uses 10 ohm and 1k, and 12v uses 68 ohm and 10k, then somewhere in the center is ~30ohm and 5k...
If you want to get really technical...
3.3v.......12v...........5v
10ohm 68ohm = 22ohms
1Kohm 10Kohm = 2.9K ohms
10ohm/3.3v to 68ohm/12v is a 6.8/3.2 times increase.
1Kohm/3.3v to 10Kohm/12v is a 10/3.2 times increase.
Going to 5v, we would get
approximately 22ohms and 2.9Kohms..
I used a graph to do the more specific measurements, btw. My guess wasn't too far off.. 8-)
To do the graph yourself, grab a chunk of graph paper and label one axis 1-10 and the other axis 1-12 (center point where they touch being 0). 1-12 is your voltage line, 1-10 represents ohms or Kohms.
Ohms: plot at 3.3v/10ohms (1 on 1-10 scale) and 12v/68ohms (6.8 on 1-10 scale), then draw a line and where it crosses 5v should be about 22 ohms (2.2 on 1-10 scale).
KOhms: plot at 3.3v/1Kohms (1 on 1-10 scale) and 12v/10Kohms (10 on 1-10 scale), then draw a line and where it crosses 5v should be about 2.2Kohms (2.2 on 1-10 scale).
I hate math... 8-)
Keep forgetting I cant upload an attachment after i've posted.. oh well.
Heres what I mean, done with psp6 and the grid function 8-)
good explaination stevil , i like understand what i'm doing , no need to like math with your drawn , the best way for learn , thanks man , tomati.
np
I find this japanese website talking about modding 3.3V and 5V for Antec 430 watts:
http://www005.upp.so-net.ne.jp/octo/pc/
http://www005.upp.so-net.ne.jp/octo/...s/image010.jpg
http://www005.upp.so-net.ne.jp/octo/...s/image011.jpg
http://www005.upp.so-net.ne.jp/octo/...s/image012.jpg
keep on moddin!!:banana:
What a horrible place to put your VR's. You won't be able to turn your screwdriver 360 degrees.:confused: :p:Quote:
Originally posted by asw7576
http://www005.upp.so-net.ne.jp/octo/...s/image012.jpg
keep on moddin!!:banana:
i'd stick them on the back like that, but so they point right off the left hand side of the PSU in that pic... then you just gotta pop off the side and turn them, plus less worry about people messing with them since they would have to know they were there.. 8-)
hi,
i've done this with 10ohm + 1k for 3.3v rail
68ohm + 10k for 5v and 12v rails ...and it works nice..but when i push 12v rail up to 12.2v or something (bios reading) my cpu goes unstable...any logical explication for this? :( before the mod it was @ 11.67v...
[]'s
get a reading at the molex.
Your bios may be reading low and your motherboard may not like going too high.
Good and informative tread you have here! I had no fixed resistors at home right now so i couldnt do the mod to my TP550 tonight. But i had some 20 turn VRs, so i tried just soldering a 20k one to an old PSU i was about to get rid of.
http://promodders.dajm.com/anv/uploa...y/Vridpott.JPG
It was no problem adjusting the 3.3V(the only rail with a thin sense line)
But im not willing to do this to my TP550 if i don´t get an ok from you experts:) Would there be any problems when not using any fixed resistors you think? like to much fluctuation or whatever?
It was mentioned as working earlier in the tread, I believe.
I tried that with a shottkey diode, as it was also mentioned as working, but it wouldn't work for either of my PSU's.
Whatever works.. 8-)
I did the mod. There are two TL431 voltage reference IC inside my PSU ( HEC 475 & 525 ). One to control 3.3V, and another one to control 12V & 5V together.
All I need is to add variable resistor to pin 1 & 2 on TL431. a 10K VR for 3.3V, and 100K VR for 12&5 V. They are set to 5K ohm and 60K ohm respectively.
The mod run succesfully, I can go up to 13V, 5.7V, and 3.9V. Of course, I don't recommend these number for use. It's just too much!!! Additional 3% to 5% increase is about right. For examples: 12.36V, 5.15V, 3.40V measure on its connector.
Infact, my system lose stability with very high voltage. So, I use 3% method.
I have another question: My another PSU is going mad. I suspect there is something wrong. The voltage is going up to 14V very fast and it cut off. One thing for sure, If you mod the PSU three times ( solder the VR and replace the VR again and again ) It gonna screw up something, may be the controller IC is screwed up. Do you guys suggest to test it again with mobo connected? I think, It's screw up because there is no load reason.
Anyone ever had this issue?
Anyone have pictures of their mods? I can't seem to visualize this (and if I can't see it, I'm not doin it!) ;D
Quote:
Originally posted by Saffire
Anyone have pictures of their mods? I can't seem to visualize this (and if I can't see it, I'm not doin it!) ;D
OK.... I have some voltmod pics. I need somebody to host the pics. Do you know anybody?
I can host pics, PM me.
I broke the leg off my last 1K VR so I used a resistor instead, 500ohm gave my 3.52V, 1K gave 3.44V. (No load, was at 3.37V before mod)
I didnt use the 60ohm, I just hooked the sense wire to the 500ohm resistor (instead of the 1K VR) then to a ground.
Heres my pics of what I got so far....
Before
http://s88708673.onlinehome.us/pics/...d/IMAG0018.JPG
grounded the resistor to a ground on the 20pin
http://s88708673.onlinehome.us/pics/...d/IMAG0020.JPG
results
http://s88708673.onlinehome.us/pics/...d/IMAG0023.JPG
Did the 5 and 12V, I used 10K's to the same ground wire I used for the 3.3V. I set them both to about 1.4K and the power supply came on the first time when I was doing the 5 and the 12V.