2,26vQuote:
Originally Posted by cronic
Printable View
2,26vQuote:
Originally Posted by cronic
Measured a few things,
I think is the ovp mod:
http://desertshooter.nl/7900GTOVPmod.JPG
The resistance between those two is exactly the same as the resistance between pin 10-11, 3,50kOhms.
Quote:
Originally Posted by DesertShooter
interesting, when are you going to try it?
The little black guy under the corner is the resistor to be removed.Quote:
Originally Posted by cronic
This resistor has to be replaced by a 5k6 resistor.
so soldering a 5k between the two points and leaving the existing resister will not work? i already have a 5k resistor soldered between those points and am waiting for a response before i power it up. i really don't like the idea of removing a resister from the board.
When you leave the black resistor in position, you have set the current limit down instead of up.Quote:
Originally Posted by cronic
5k//3k5 gives you a combined resistance of 2.0Kohm, lowering the current 2.0/3.5 = 0.6 of the original current.
The 3.5 Kohm resistor must definitely be taken away.
well, i guess i will remove this 5k. so i would need to remove the 3.5k and replace with the 5k. just not sure i can remove it without damaging the solder pads.
what would the 5k raise the ocp to?
I see no reason why you can't get the 7900GTX clock speed with some trial and error once the current limit is increased.Quote:
Originally Posted by cronic
Try to unsolder the 3.5Kohm carefully.
I am sorry I do not have a 7900GT yet, else I would have done it myself.
The 7900GT is not available in Holland at the moment.
Cronic, how did you do the Vmodding and what voltage have you set on the GPU.
Anxiously waiting to see if this mod works to release GT to GTX speeds.....
:slobber:
Of course you will also have to raise the Vgpu to 7800GTX levelQuote:
Originally Posted by mongoled
Yes ofcourse, but tht is not wht seems to be limiting peeps overclks :p:Quote:
Originally Posted by t024484
Its probably been mentioned, but can somone just confirm this for me, are the PCB for both cards identical, maybe the power regulation is different?
Quote:
Originally Posted by t024484
followed the instructions here:
http://www.vr-zone.com.sg/?i=3330&s=2
and it works but the ocp kicks in at 1.295v
i will have to have the 3.5k removed by someone with the correct equipment. should be able top do it at the university.
That's exactly what I thought.Quote:
Originally Posted by cronic
I do not want to be a wiseguy, but I have serious concerns about this Vmod.
Looking at the picture, it seems that this point goes to pin 7.
If this is the case,this is not a stable solution because pin 7 is fluctuating causing the output voltage to start fluctuating if you connect a resistor to this point.
Only pin 3 should be used to adjust the output voltage and is exactly meant for this purpose by the chip supplier.
Quote:
Originally Posted by t024484
ok is there a pointon the pcb other than on the 32 pin vr that connects to pin #3
with the vmod from vr i am running at 620 on the gpu at 1.285v and it is completly stable for hours in battlefield 2 and 3dmark05 and 06
I have indicated in red the point that seems to go to pin 3.Quote:
Originally Posted by cronic
Use a multimeter to check this.
If you are lucky, the point left to this point is ground.
Attachment 44961
The PCB's are very different, just look at vr-zone.com to see the pics. This is the reason a bios voltmod is not possible, as i expected before anyone even tried my bios.Quote:
Originally Posted by mongoled
The clocks are applied dont worry about the score its coming.Quote:
Originally Posted by mascaras
>>3dmark 2005 ---10253:
XFX 7900GT Extreme @ 585/1860 -Stokcooled ,stok bios
http://img115.imageshack.us/img115/9...18604vv.th.jpg
----------------------------------------------------------------------------``--------------------------------------------------
>>3dmark 2006 ---5007 :
XFX 7900GT Extreme @ 565/1800 -Stokcooled ,stok bios
http://img124.imageshack.us/img124/6873/2k6oc4mm.th.jpg
-------------------------------------------------------------------------------------------``------------------------------------------
>>3dmark 2003 ---20375 :
XFX 7900GT Extreme @ 550/1630 -Stokcooled ,stok bios
http://img145.imageshack.us/img145/6...16300yu.th.jpg
Here's mine... :D
Stock Cooling and BIOS. Its an XFX 7900GT 520/1500.
Got it up to 590/1740. No artifacts or anything. Might be able to get more with some better cooling. Stock heatsink is small. :P
Using 84.21 drivers.
Cronic, I had a closer look at the picture that you made of U502, and I could see that the Vmod point that you are using is connected to pin 6 and not to pin 7.
Although not as good pin 3, it is far better as pin 7 as it appeared to me on previous pictures.
You can stay with the 50Kohm VR that you have now, instead of the 100Kohm that I suggested out of cautiousness, and simply switch the right end from point 6 to point 3.
Once the 3.5Kohm resistor has been removed, please measure if it still has a value of 3.5 Kohm.
Since you have measured this resistor value in circuit, it could have been shunted by some other (chip internal) resistance, giving you a false reading.
Whatever the value of this resistor is, the new resistor taking its place should be minimal 50% higher in value.
Passing 562MHz on the core I get artifacts but only at 2D !! Isn't that stange ?
Note that I'm only OC'ing 3D performance with Powerstrip.
What can it be ?
Almost 11K
Attachment 44989
-t024484-
We could discuss about these voltage mods in here:
http://www.xtremesystems.org/forums/...ad.php?t=92874
Yeah the pic speaks for it self, 575/900 opty @ 3040mhz
http://www.bxd.dk/3dmark/03/21250.JPG
thanxs for tht information Alexio, it looks like alot of people are having fun with their 7900GT's. I am quite pessimistic tht there will be a workable solution in enabling the GT cores to clock like GTX cores. I really hope tht i am wrong :)Quote:
Originally Posted by alexio
Could you tell me what the default 3D vCore is for the GPU of the GTX and GT, and what their 2D voltages are? Im assuming tht the 7900's work like their ATI equivalents when it comes to 2D and 3D clocks.
7900GT gots the same voltage for 2D and 3D - 1.2V
You're welcome ;)Quote:
Originally Posted by mongoled
7900GT:Quote:
Could you tell me what the default 3D vCore is for the GPU of the GTX and GT, and what their 2D voltages are? Im assuming tht the 7900's work like their ATI equivalents when it comes to 2D and 3D clocks.
3D: 1.2v
-
2D: 1.2v
7900GTX:
3D: 1.4v (1.36v messured by Shamino)
thrtl: 1.4v
2D: 1.3v
Hey another new member :)Quote:
Originally Posted by Greg_1
Welcome to the forums :cool: , hope you have a fun time, lots of good information to be shared, I wonder if the GTX have a different 3D speed. Im sure someone will answer my question :)
doh, i didnt read all the thread, only the 'You're welcome' part from Alexio post, hehehe, my question was already answered :slap:
:p:
So next question is wht is the highest 3Dclock tht we have seen so far? And wht voltage is this at? How are people certain tht the problem is over current protection? Do the pcb's have the same amount of layers? Is the power controlling circruity the same for both cards (lol, anyone think it is maybe time i did some readin up, hehhehehe :))?
Maybe the GT cores really are just speed binned chips, i sure hope not ;)
Thx m8 for the welcome
I'm able to get 550x850 on my BFG OC 7900GT.
Will run some benchies tomorrow when my maze 4 and new mem arrive
So if i'm hearing this all straight - BIOS flashing isn't working right to raise volts, and hard mods get black screens past 1.3v on the core? Man that isn't looking good... i wanted some real volts, i'm watercooling the card.
has anyone seen that mavke rel'd a new nibitor?
i dont know how to work it.. do you edit the table first?
http://www.peecee.dk/uploads/pics/nib28.jpg
I was checking the ISL6568 datasheet and in my opinion the resistor must be removed but not replaced by another one. If none is in place (infinite resistor), the overcurrent protection will be disabled forever.Quote:
Originally Posted by t024484
nibitor 2.8 doesn't work :mad: you can't change the VID value :dammit:
Update:
X2 3800+ Manchester, LDBHE 0543SPMW
DFI LanParty nF4 UT SLI-DR Expert
XFX 7900GT Extreme, Zalman FS-V7 cooled, vdimm = 2,27, vcore = 1,274.
TeamGroup 2x512MB PC4000 BH/UTT
OCZ PowerStream 600Watt
VapoChill LightSpeed
X2 @ 3,1GHz
7900GT @ 630/2020
TeamGroup @ 220MHz
Validation
11370
http://desertshooter.nl/11370klein.JPG
http://desertshooter.nl/P3180014klein.JPG
http://desertshooter.nl/P3180012klein.JPG
anyone know if the AQUACOMPUTER AQUAGRAFX 6800GT/ULTRA REV2 fits in 7900GTs???
someone teel me that they fit in 7800GTs , so its possible to fit in 7900Gt???
the block is this:
http://www.aqua-computer.de/prodimg/...6800_1_500.jpg
BTW: nice score deserter
Nice clocks ;)Quote:
Originally Posted by DesertShooter
Looks like the highest core speed so far!
1.274V!!! Woohoo...
at least folks are willing to give an extra 0.07-0.1V a try
DesertShooter, will you perhaps try to remove that resistor and see if that helps? Has anyone removed that resistor yet?
Does anyone have a clean diagram of connecting to pin #3 and which exact resistor to de-solder.
no one know if the aquagrafx 6800/GT REv2 fits in 7900Gts????
Does all 7900GT cards have tha same memory chips? (I mean 1,4 ns modules)
For example - XFX 520/1500 and ASUS 450/1320 ?? (the second one have 1,4 ns samsung chips)
Post some pictures of your mem chips :D especially macro ones. :]
Very very nice work Desert. Impressive mem oc :cool:Quote:
Originally Posted by DesertShooter
>>3dmark 2005 ---10321:
---Opty 148@2990Mhz
XFX 7900GT Extreme @ 590/1820 -StoKcooled/Stok bios
http://img90.imageshack.us/img90/8245/2k559018200gs.jpg
and im done test with stokcooler and stok bios :coffee: :coffee:
Any1 can answer me? I'm asking beacuse i'm going to buy one of those 7900GT cards. Maybe leadtek, ASUS, or GB. I see that you got incredible mem clock in here with this XFX.
Please Desertclocker - post some pictures of the memory chips on that card :D
Does all 7900GT cards have tha same memory chips? (I mean 1,4 ns modules)
For example - XFX 520/1500 and ASUS 450/1320 ?? (the second one have 1,4 ns samsung chips)
Post some pictures of your mem chips especially macro ones. :]
Yes we all have the same samsung 1.4ns chips;)
Then it's an amazing score for a 1,4 chips :]
god damn you all......... ;)
:]
*double post* sorry
Gigabyte 7900GT out of the box, no ramsink on the memory chip.
http://img.photobucket.com/albums/v6.../79GTgiga1.jpg
http://img.photobucket.com/albums/v6..._samsung14.jpg
Venice 3000+@ 2.7GHz (300x9), Team PC4400 @300 CL 2.5-3-3-7 1T, DFI NF4-D modded to SLI-D.
http://service.futuremark.com/compare?3dm05=1899801 = 10.151
Mascaras, nice core you have there amigo ! :D
Removed the resistor but still no go > 1,3v :(
Quote:
Originally Posted by jVIDIA
heheheh thanks .
(monta mas e dual core e torra a gaja :D)
Thats what I was afraid of :(Quote:
Originally Posted by DesertShooter
Wow, that is some OVP they have going on.
Good man for trying though! :toast:Quote:
Removed the resistor but still no go > 1,3v
So far a tough nut to crack.
If Mr. nVidia engineer is by chance reading these posts... congrats man. You did a really good job. Now, enough teasing and let us in on your little secret ;)
Ouch!Quote:
Originally Posted by DesertShooter
Thats some bad news :(
716 core / 984 memory so far on this power supply. I have a feeling the core may go higher when I get my new one.
XFX 7900 GTX 665/1630 model.
Heh, where there is a will there is a USUALLY a way....I hope we can figure it out cause I just ordered my gt....Quote:
Originally Posted by ***Deimos***
OVP is defeated :toast:
1.5Vgpu
CPU is only 2.6GHz
Attachment 45099
Excellent!:toast: :woot:Quote:
Originally Posted by SF3D
Nice work!
how did you passed over OVP?
Did you use stock-cooling?Quote:
Originally Posted by SF3D
675Mhz in the core ?? :eek: :eek:
come on m8 tell us how you defeated the OVP
oh btw n1 ;)
Here is another one!
705MHz core!!! :slobber:
Attachment 45102
Look here:
http://www.xtremesystems.org/forums/...t=92874&page=2
Good job , now you have a 7900GTX with 256Mb/1.4ns :D
holy crap! Damn nice :D
Little more cpu speed.
Next 12K!
Attachment 45104
Sweet I think i have to do the mod now :D damn good job guys and 705mhz on core wow.
/Grau
Quote:
Originally Posted by t024484
Got that?Quote:
Originally Posted by VoRtAn_MaDgE
3DMark06 with same settings.
Attachment 45115
SF3D, that is amazing. Could you give us a little summary on how you did it? And then post it all over the web, let's tell the world how to bring those sons of b1tches down! (cuts to a bunch of guys operating telegraphs).
Absolute_0
The whole "story" is in Xtreme Mods section :)
http://img.photobucket.com/albums/v6...GT_voltmod.jpgQuote:
Originally Posted by Absolute_0
I simplified all the info posted in the voltmod thread.. credits to all the hard working (and persistent) talents.
EDIT: for voltmod, replacing stock heatsink strongly recommended (heat/power increase ~16% per +0.1V, ~30% per +0.2V). Also, would somebody be kind enough to provide voltage scaling results..ie highest at 1.2V, 1.3V, 1.4V, 1.5V - for most non-extreme modders, I think about 1.4V would be enough to get to GTX clocks.
EDIT: "Vgpu measure" IS NOT GROUND.
Great, this is good news.
So i'm a newb, never Vmodded... 1) this is different from Shamino's guide, no black screening? 2) connect to ground, is ground the Vgpu measure point? As i said, never Vmodded before, just trying to get this straight.
next monday i wiil receive the waterblok and i will do the 1.4v MOD and i will report if it works great or not :D
great! cant't wait for your results.Quote:
Originally Posted by mascaras
Ground.. go check out other mods for definition/explanation. Usually when measuring, I use the back bracket of the video card as ground (ie after double checking I indeed have the correct contact point, and multimeter set to voltage measure, stick the red probe on the measure point, then touch the back bracket with red probe)
PS: I would recommend using very very thin wire (IDE cable?), and nice good electrical solder for this 7900GT volt mod job.
You can also use molex black cable for ground, as well as nearby land pads and unused solder points on the video card PCB.. nearby ones for capacitors are usually ground, but always make sure to measure that they are connected to ground with multimeter.
What about doing the pencil trick between pin 21 and 22 ?
I think you can get 1.4V right away.
SF3D, thats just an amazing score. Keep up the good work! :)
sure, but isnt a piece of wire easier? Just as difficult to pencil such tiny spot.Quote:
Originally Posted by TimeOut
nice info... still waiting for a softmod
buckle up and stock up on supplies, its going to be a long wait. The only video card I can think of that has "soft-mod" voltage control is X1800/X1900. There is no guarantee you would be able to do the same with another card.Quote:
Originally Posted by Red.Sky
Besides, just because it seems difficult (it isnt) doesnt mean you cant get it done. Just ask one of dozens of xtremesystems members who would be glad to do it for you.
well just got my first eVGA 7900GT CO, 564/1800 was a snap. When I get my 2nd card I will do the mods. :cool: Great cards.
Can you show me on the drawing exactly where to do the trick? ThanksQuote:
Originally Posted by TimeOut
Same here ... no fan of hardware mod's.Quote:
Originally Posted by Red.Sky
all you need to do is jam / solder wire between pin 21 and 22 on the right for the extra +0.2VQuote:
Originally Posted by Belarion
EDIT: inevitably, someone will mention pencil again... once again, I don't see how you could precisely get the lead ONLY between those two points. Pencil is good for lowering resistance of SMD resistor, but in this case I think its easier to jam tiny wire in there, or better yet, solder between those points. This is really really small IC... things in jpg may appear bigger than in real life ;)
Hi guys this is my first post with my 146opty+ standard xfx7900gt..... oh and just received my 165 opty.:)
http://img50.imageshack.us/img50/9458/063rj.th.jpg
Great job guys in finding a solution to the OVP!!! :clap: :clap:
Now GTX speeds are easily possible with good cooling.
I'm really itching to get one 7900 GT, but unfortunately I'm not that wealthy so am looking to buy a Asus 7900 GT, so no extreme version. Will it make a large difference with maximum overclock or is it impossible to tell something about it ? :stick:
Excellent Mod guys.
So this mod is an alternative to the other voltage mods using the variable resistors?
Does it work on a 7900 GTX?
Opty165@2.75 7900gt@562/1644 no artifacts yet + not pushed opty to it's limit either....on air.:D
http://img370.imageshack.us/img370/6...dual2ob.th.jpg
How do the 7900 GTX overclocks equate to increased gaming performance? That's what I'm curious about when seeing all these 3D benches.
I see these clocks getting higher than the X1900 XTX cards so does this mean that they will outperform (on average) versus the X1900 cards that don't have as much overclocking headroom (higher heat, larger process)?
Basically, I see these cards at stock performing almost identical in games such as BF2. However, will the 7900 GTX pull comfortably ahead with the larger overclocking headroom?
Bottom line do we use the Geometric Delta Clock or not ?
good going guys
NO,Quote:
Originally Posted by Danger30Q
although they're huge power hogs, and get really hot, X1900's have fundamental architectural changes which simply make them more efficient. Similar to how 6800's were always faster in Doom3 than X800's because of ultrashadow etc.. 7900GTX is cooler/less-power for sure, but that alone doesnt guarantee huge overclocks.
As already mentioned 1000 times, in most games X1900XTX and 7900GTX are neck and neck, with upper hand for ATI in FEAR and especially COD2. :horse:
I managed 900Mhz on core now, 1.82vgpu :D
Mach II R404 on gpu and -4 degrees roomtemp..
Because of crappy cpu I only did 03:
http://service.futuremark.com/compare?2k3=4699440
Placed the following and so far the card is rock stable with great results...
Bios
Core : 530 - Geometric Delta Clock 40.
Memory : 775 ( 1550 ).
I would push it more but no reason for that at least not now..
Anyone tried to change the PCI Express Frequency Speed to see if it impacts the cards speed ??
well... im only at 550/800 for now :(
Thanks again for all the great work on the voltmods.
EVGA 7900GT OC SC (565)
710 Mhz GPU 1.580v 3d
1820 Mhz Memory stock volts.
16009 O5
10148 06
Holy :banana::banana::banana::banana::banana: nice 06 score man.
Oh man, that is just awesome for a couple of 7900gt's...Quote:
Originally Posted by cronic
...guess if I'm itchin' for my eVGA 563 to show up, it's coming in from the Egg...only needs to do a pit stop over at nn_step (a premium XS member that kindly took me under his wings, thanks bro :toast: ) and then into my empty PCI-E slot...
I'm sitting here with my 2mb 800x600 16bit PCI desktop card and are seeing those number fly by....not easy, not easy.
wow you guys are all doing great....so tempting damn it and i don't even game that much....heheheh.....hmmmm maybe i'll grab one (would be nice to know if some of these are consistent OCers) and get c-buzz to build me a GPU phase unit :D