Yeah, i'd like to at least go 1.35v for some 900mhz action on water.:up:Quote:
Originally Posted by dinos22
Printable View
Yeah, i'd like to at least go 1.35v for some 900mhz action on water.:up:Quote:
Originally Posted by dinos22
Yeah lol, i turned off pretty quick ;)
In addition to that, I almost burnt the card last night, straight after writing a drunken post on i4 i started playing with the volts, not realising my probe was in the vCore (CPU) read not vGPU. Kept turning and wondering why my volts werent budging.
Next thing i smelt an aweful burning smell and i pretty quickly realised what was happening. Dont know what i had turned teh volts up to, but the card seems to have survived. :clap:
that is amazingQuote:
Originally Posted by T_M
what cooling was on it
Almost empty DICE (with no acetone) at about 0C.
I was idling waiting for LN2 on CPU to pull down.
lucky it wasn't air cooled
how the heck did it survive such a spike
WOW MAN
you just gave hipro ideas i think :D
watches him bench at 1.8V now :rofl:
Given the burning smell, i'd say at least something was damaged.
Maybe i burned a phase of the power supply circuit?
But teh card still runs, havent benched it though.
Bump for more details/confirmation/numbers on the GT OVP mod.
http://www.xtremesystems.org/forums/...&postcount=276
Anymore info from anyone, or has everyone just gone into the main thread?Quote:
Originally Posted by central
+1 my OVP Mod not work on my 8800Ulrta :shrug: Help.Quote:
Originally Posted by Hazaro
and BIG Vdoop - 0.095 :mad:
Alex, does your resistance across the OVP resistor read constant value? Or always changing?
Ohhhh.......C'mon you guys.......!...... :D .....Who's gonna solder extra coils in parallel with the existing ones so to avoid the BIG Vdroop of it and then test it in real?.....
ONLY thing you need, is to unsolder some coils from an old motherboard and then solder them onto the VGA with a lot of heatage on the soldering iron..... ;)
hipro5 The purchase of the coil also I shall try to make this mod.
Get some .68uH at 25A+ each (at 25*C)..... This you can be put?
Yes.......ALSO if you don't mind, solder a couple of electolytic capacitors in parallel with the ceramic ones.....2200uF/6.3V whould be fine.... ;)Quote:
Originally Posted by Alexxx650
hipro, i'll give it a go.
Can i use the caps and R47 coils from a P5B Deluxe?
http://www.pcinlife.com/article_phot...p_1.03g-01.jpg
onto
http://www.ixbt.com/video3/images/re...scan-front.jpg
Quote:
Originally Posted by T_M
Links don't work...... :(
Yes you could use them..... ;)
Many thanks for answers and your help. :up:Quote:
Originally Posted by hipro5
http://img148.imageshack.us/img148/9...8432wa4.th.jpg
water
For anyone interested in performing hipro's vGPU smoothing mods, here's a confirmed correct diagram of how to achieve it
http://img.photobucket.com/albums/v3...scan-front.jpg
The caps need to be electrolytic 1500, 2200 or 3300 uF with the '-' terminal on the ground side of the SMD cap, and the '+' terminal on the vGPU side.
The coils should be from an old mobo and just soldered across the existing ones.
Thanks T_M for the help...... :)
Tried the caps couple weeks ago, not of great use, no better overclock or higher benchable voltage. It's the coil that needs a mod. 'Any coil' will not help, you need right value's.
Darn, and i was about to do the mods with 'any values'.
So, what do i need?
'any values' from 0.47uH to 0.82uH...You can put even a 1uH.....:DQuote:
Originally Posted by T_M
Hmmm, i went to an electronics shop and they had a box full of unlabelled ones.
So i just grabbed a handful of them and a handful of 2200uF 6.3V electrolytics.
Is it the size that determines the value? If so from a photo could you say if OK or not?
http://img.photobucket.com/albums/v3...icture0011.jpg
http://img.photobucket.com/albums/v3...icture0021.jpg
going to do this now that there is a picture!!!
GREAT JOB GUYS!
T_M what will those mods achieve for you
Higher GPU clocks
i meant electronics wiseQuote:
Originally Posted by T_M
is that part of the OVP mod?
Quote:
Originally Posted by hipro5
Quote:
Originally Posted by hipro5
Just incase you missed it.Quote:
Originally Posted by T_M
It seems it should be performed in conjuction with the OVP mod to gain any real benefits.
cool
T_M I think that these coils are a bit HIGH in uH.... and LOW in current...
Also are these caps with low ESR or you just bought what this shop had?.... :(
Why don't you try what I've told you?.....Find an old motherboard and unsolder them...There you will definatelly find HIGH current coils with low uHs and LOW ESR caps.... :)
Because here in Singapore an "old" mobo costs ~USD$40, and all my dead/surplus boards use solids.
Guess i'll just have to go on an old/dead mobo hunt....
How can you tell about the chokes being high in uH, is it the wire thickness?
Find an old ABIT IC7 or ASUS P4C800 series......They are GOOD....PLUS IC7 has the BEST Electrolytic caps Rubicom..... ;)
Chokes (Coils) MUST be a bit bigher then the ones you have and MUST have THREE coils in parallel rounded on the ferrite core (about 5 - 6 rounds)..... ;)
Oh i see now, when i look back at your picture.
Its 3 wires that are looped on yours. OK mate i'll keep looking.
Will these do the trick?
Pretty sure its what im after so ill start harvesting.
http://img.photobucket.com/albums/v310/T_M/MSIboard.jpg
http://img.photobucket.com/albums/v3.../MSIboard2.jpg
They are just........PERFECT....... ;) :D
Awesome, any tips then on how to remove them?
I know i need a lot of heat, but what technique?
Heat the underside or the topside?
Wow, that was easier than i thought it would be.
60W soldering iron and a little gentle persuasion:
http://img.photobucket.com/albums/v3...cture001-1.jpg
http://img.photobucket.com/albums/v3...cture002-1.jpg
http://img.photobucket.com/albums/v3...cture003-1.jpg
http://img.photobucket.com/albums/v3...cture004-1.jpg
Heh, heh, heh......You're moving perfect.... :D
I wouldnt call my soldering skills perfect, i had a hard time getting the solder to stick to the existing inductors, but i think i've managed:
http://img.photobucket.com/albums/v3...cture006-1.jpg
http://img.photobucket.com/albums/v3...cture008-1.jpg
Looks like my Ultra has two dicks hehehe
The card is now running on water, no problems there but im still seeing 0.05V+ vdroop in ATItool, and 0.38V at worst point in Firefly '06.
Absolutely the same thing with my Leadtek 8800GTS - OVP Mod is NOT WORKING with GTS :brick:Quote:
Originally Posted by Hazaro
Replacing the 70b resistor with 4,7 KOhm lowers Vgpu, and after adjusting it to the same level (1,45 Vgpu (2D)) it causes blank screen in HL2 Episode Two again with Vgpu drop to 0.
If you have 3539 datasheet, please post it! :help:Quote:
Originally Posted by hvtecgr
Measure with a multimeter to be sure after on the coils you have soldered and on the side of them which is to the Core.... :)Quote:
Originally Posted by T_M
Also do the OVP Mod.... :)
Next time when soldering, use some soldering paste to "smooth" your solderings.... :)
Just measured each coil on the core side, and from bottom to top i read:
1.628V, 1.625V, 1.615V, 1.615V
My vCore read point on back of card reads: 1.615V
Will attach my OVP mod and see if there is a change to droop.
BTW my droop is 0.08V in 3d01!
Having a lot of troubles with driver corruptions and such, but as far as i can tell so far, when i connect the OVP ground i end up with vdrop (not droop) of about 0.1V.
Is that supposed to happen?
Note that i still cannot get 5.1K on the OVP resistor.
As soon as i trim down past about 5.8K it will suddenly jump to 4.2K and keep going down.
Leave it at 4.2K and test it there to see how it will react.... :)
But do you think it's safe to operate if i'm seeing such a large vdrop (not droop)?
dinos22 & hipro5 & T_M
All show the drawings a drawing, on which 4 capacitors, but beside all cost stand whole 2. why?
That will give if put only 4 capacitors? value has not found.
I only put 2 capacitors because thats what Hipro did.
If it will help, i can solder on 2 more.
Here's Hipro's: http://www.hipro-tech.com/images/hip...800Ultra_moded
Forgot your .jpg ending ;)Quote:
Originally Posted by T_M
http://www.hipro-tech.com/images/hip...ltra_moded.jpg
DID you put HEATSINKS ON VGPU's tiny Mos-Fets?.....Coz the hoter they get, their charasteristics change......Heatsinks ON them, is a MUST..... :)Quote:
Originally Posted by T_M
IF you play with subzero, you don't need heatsinks on ram chips (better put on them too but not that much needed) BUT on the Power Mos-Fets you deffinately NEED....
Want to put only 4 capacitors. I this will help? Or no?
Tested again attaching my OVP mod.
While running i grounded it and that cause a 0.04V boost to vGPU while idling.
Then i rebooted and suffered 0.1+V vdrop and the system wouldn't load windows.
Would any of these work?
http://img254.imageshack.us/img254/2452/p1040202xc3.jpg
I would like to try this on a 8800GT*, the OVP mod did not work for me http://www.xtremesystems.org/forums/...&postcount=402
If those caps came off a motherboard then they should no problem.
The coil is no good from what ive been told.
http://www.xtremesystems.org/forums/...&postcount=2340Quote:
Originally Posted by T_M
P.S. B.T.W., I've made the Vdroop mod for my GTS:
http://www.xtremesystems.org/forums/...&postcount=239
There is one interesting idea, but still not enough time for that:Quote:
Originally Posted by need.for.mhz
http://www.xtremesystems.org/forums/...123046&page=10
Great work N1ck R1mer :up: I appreciate all of your help. I will hold off on the coils, the caps come off A P4 mobo so they should be good. I will try to find the resitors you removed from your GTS. I'm still in process of digesting all of the info. I hope shamino will speak up.
Nonetheless this is a great news to me ;)
This would be the spot to solder caps on 8800GT right?
http://img132.imageshack.us/img132/8330/capmodmn7.jpg
Edit: So I have to remove 3 (or 2 resistors) from my card to disable OCP since it kicks earlier than OVP, and then try lowering the OVP resistor from 5.2K to 4.7K or lower? I have hard time figuring out what resistors I should remove http://www.xtremesystems.org/forums/...5&postcount=65
There are two of them at GT, connected to the same primarion pins. If you remove them, it could disable Vdroop, but not the OCP. I dont't have the GT card, so I cant't check this out. Is there any Vdroop on GT w/o any mods? :shrug:Quote:
Originally Posted by need.for.mhz
Yepp, right.Quote:
Originally Posted by need.for.mhz
No, I don't know for sure how to disable OCP. The idea is to solder parallel resistors (3 for GTS, 2 for GT) to those capacitors located near the resistors that I removed.Quote:
Originally Posted by need.for.mhz
The results of lowering OVP resistor (70b) from 5.2 to 4.7 K are:
1. Vgpu decreases (about 0.1 V)
2. OVP should work at higher voltage than with the stock 70b resistors. Practically point 2 is useless with GTS & GT, cause OCP still works earlier than OVP.
Nick, when i tried the OVP mod on my Ultra i thought i'd done it wrong because vGPU was suddenly 0.1V less than before. Are you actually meaning to say that means my mod was successful?
I noticed same exact thing, 0.1v less (I had to go down from 5.2K to 4.3K to notice the drop, 4.7-4.9K did nothing)Quote:
Originally Posted by T_M
The 8800GT actually overvolts 0.05 to 0.07v at stock.
Edit: I just did the cap mod, so far so good.
http://img90.imageshack.us/img90/6805/capmodse4.jpg
8800GTS 512Mb overvolts about the same at stock as well, however the higher you adjust vGPU, the larger the overvoltage under load ;)
So watch out!
Don't know about Ultra, the resistor for OVP has another default resistance value than 70b at GT/GTS. But I'm sure that OVP mod is very useful with GTX.Quote:
Originally Posted by T_M
Are you sure about polarity? :confused: The "minus" (- - -) cap pin should be on the ground. As I see on the pic, it's right, but for sure...Quote:
Originally Posted by need.for.mhz
BTW, soldering is pretty acurate :)
PS Chemicon KZG caps are nice, Low-ESR (1500x6,3 - about 26 MOhm). Not the best, but nice.
http://www.chemi-con.co.jp/pdf/catal...g-e-070821.pdf
I removed the corresponding resistors on my GT to disable the overvoltage. Card still overvolted but guess what Nick? Card does not shot down anymore no matter what voltage. I did some preliminary testing upping card to 1.6v in 3DMark and 1.5v in Crysis. I ran 3DMark06 at 918Mhz and played Crysis at 900Mhz!
Let my need for mhz begin :worship:
Which resistors would that be :DQuote:
Originally Posted by need.for.mhz
NFM, do you mean that your overvoltage value is now your normal volts?
Not exactly, card still overvolts. At 1.50v idle it overvolts close to 1.60v (firefly 3dmark06). Looks like OVP does not exist on 8800GT :confused: , once you disable OCP through removal of two resistors, card will never shut down.
http://img264.imageshack.us/img264/4...00gtocpxa2.jpg
These are same resistors (x78 value) nick removed from a gts, and his effect was no more vdroop.
Quote:
Originally Posted by need.for.mhz
OMG you just figured out the OVP modQuote:
Originally Posted by need.for.mhz
that was easy :D:D:D:D:D::D:D :up: :up: :up: :up:
N1ck removed the '70B' resistors, you have removed 2 '70X' resistors. Can you tell me what pins of the PX3544 chip that have continuity to the 2 resistors you removed? It looks like the top resistor joined point 1 in my pic and the second side resistor joined either point 2 or 3.
so to get this straight im tryin to understand.. you unsoldered those 2 resistors, and now you can basically up the voltage/overclock the gpu to your hearts desires? (of course withen the limits of what the gpu can handle til it craps out)Quote:
Originally Posted by need.for.nfm
No, I've replaced ONE 70b (5,22 K) resistor (it connected to Vmax Primarion pin) with the 4,7 K (first with 5,1 K) to get rid of the OVP, but OCP still works. I've tried to disable OCP, so I removed that three '78X' resistors, but the effect was unexpected (I only discovered the Vdroop mod as a result).Quote:
Originally Posted by Timbosan
I'm glad to hear that! The resistors you removed definetly belongs to the current control scheme, so my first objective was to disable OCP.Quote:
Originally Posted by need.for.nfm
right my bad sorry. i was at work, my mind was somewhere else & i got the ocp & ovp mods confused :p:
Is it technically possible to remove overvoltage on my 8800GT? BTW I did not do OVP, it's at original 5.2K. If you guys (Nick, T_M or Timbosan) have any ideas on unsoldering few things let me know ;)
@Timbosan
I do not know how to check the continuity :yawn:
i think the OVP mod would be one of these 2 resistors i identified with the pink square. What are the 2 resistors resistances?
to check continuity you set the dmm to the 'diode' setting, it looks like an arrow with a line through it near the head. alternatively you could set it to resistance and see if there is a zero resistance connection.
I wasn't sure which points, I sticked it to where I unsoldered the resistors, top showed 1.22 and bottom 0.53 (according to the pic)
70B is the OVP for 8800GT, but that adjacent 63B resistor looks interesting :D .
Hey! I'm not gonna repeat what I said once. There is ONLY ONE Vmax Primarion pin.Quote:
Originally Posted by Timbosan
yeah i know the 70b is ovp resistor & connects to vmax pin. we sorted it via PM i thought he meant something else - to remove ovp completely (as he has performed the ocp mod the only limitation is voltage) I thought he wanted to unsolder the resistor - so i wanted to see what it had continuity with to see if that would cause trouble.
i've problem of card shutdown when i do anything over core 710mhz.vmod at 1.45...
is anyway to remove few resistor for GTX to disable OVP...?
The GTX OVP mod is post 1 of this thread :)Quote:
Originally Posted by hehee
http://www.xtremesystems.org/forums/...d.php?t=162124
i've no luck for my GTX...1st batch...Quote:
Originally Posted by Timbosan
get frezee anything above core =695mhz
no effect from 1.5v to 1.6v
dun dare put above 1.6 cause on water only
mem also limit to 1035 not much effect on mem vmod....
i guess OVP not for me ....
btw is anything overclocking protection for GTX ?anyone can answer this...?
hehee, if you are using stock, you shoud try a better cooler, - Thermalright for ex.
on water now...temp never more than 56cQuote:
Originally Posted by N1ck R1mer
i mod the 4x rubycon 6.3v 1500uf but not the coil yet...
anyway i tried OVP ...no luck still kick in bout 1.6v
http://www.xtremesystems.org/forums/...&postcount=234Quote:
Originally Posted by hehee
This is OCP, not OVP.Quote:
Originally Posted by hehee
8800GTQuote:
Originally Posted by nfm
What brings the benefits, Please For detailed statement.
Merlin
Quote:
Originally Posted by by -=Merlin=-
yeah i'd like to know too what's the point of adding those and whats your overclock on the card? thanks
adding the caps in parallel to the existing caps provides extra filtering of the gpu voltage. However this only comes into play at voltages above ~1.5v. Adding the coils im doubtful would help at all. Adding the caps (& coils) wont give you a better overclock alone, but are meant as a supporting mod to assist running high (1.5v +) gpu voltages.
True, this can and has be done for many other hardware in the past, still it is not the best way to get rid of OCP.
I've moded 4 caps only helps the cpu overclock ...
b4 the vcore of cpu wasn,t stable jumping between 1.488-1.502...
after i put on caps mod it stable at 1.488
it benefit my Q6600 from 3.6 to 3.85 stable now.
but not helping for gpu overclock....
weird...
So for 8800gt/gts g92 mod's the same?
Little bit confused with so many pics :rofl: ...
Ocp makes the vga no longer "shuts" down ???
Clear pics would be great
OCP for 8800gt/gts g92 this one?
http://img264.imageshack.us/img264/4...00gtocpxa2.jpg
Ovp no luck so far correct?
OVP has been done (read first few pages of the thread). Here:Quote:
Originally Posted by VoRtAn_MaDgE
Possible to prevent the card from the shut off without taking the resistor off?
Can we add a vr at one side of the smd and adjusting the pot to neutralize the value ?
Or maybe pencil mod for ovp
OVP works at home (1.62V burn OK). But OCP doesn't work (last explosion for Aquamark is the best test for it).
Any idea for OCP removal ?
http://www.xtremesystems.org/forums/...1&d=1198824594Quote:
Originally Posted by jmax_oc
Removed, add a pot or penciled the bastard ? :D
:up:
Hmm, to cancel OCP, do I have to unsolder the 2 little resistor surrounded ?
Sorry for nub question guys but do these work with G92 GTS also ? Is there a thread on my card ? What is the difference between OCP and OVP ? Which do I need on a water cooled card ?
Any help would be great.
:up:
Up : how to cancel OCP on Primarion 3544 controller ? 8800GT for me.
I have an old A2 8800GTS-320. I tryed to pencil the assigned resistor (post #7). I lowered the resistance to 4,75 KOhm as you said. My default VGPU falled back with ~0,1 V. I started to turn down my soldered resistor (for VGPU mod...) until 1,45 VGPU and gained some extra Mhz but OVP (or OCP, I do not know what is the correct word) turned down my card during 3DMark.
Does anybody tryed it with success? Which is the good resistor and resistance value?
janos666,
It's possible your card is tripping due to OCP.
G80 OCP mod can be found here.
You need to solder some SMRs on couple of SMCs.Quote:
Originally Posted by jmax_oc
->
http://www.xtremesystems.org/forums/...&postcount=546
Basically it's the same as G80 OCP mod. Just different locations.
Where is the negative/positive? :confused:Quote:
Originally Posted by T_M
as per PM, measure which side of the SMC is grounded and attach the negative to that.
Hi,
There is a lot of different ovp mod, i'm not sure that every one works perfcectly.
Did anyone find it and can set 1.6v on gpu ?
I need it, LN2 is coming last week so i don't want to be stuck at 1.4v.:p: Please help me!
Thanks ;)
I never had any luck in raising OVP
So how do you get 1.1Ghz + on a GTS 512 ?