Even a monkey will understand these pictures... http://xtremesystems.org/forums/show...191#post947191
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Even a monkey will understand these pictures... http://xtremesystems.org/forums/show...191#post947191
yes they are good the pictures. but what happens if some one forgets to up the resistance on the trimmer before booting the computer they will be at risk of over volting the GPU(that why a guide like malves or a thread with tech nical help will be a good idea).. i have done some research and i will be modding my sisters card and my brothers new card when he gets it. and my card of course. my sisters card is alot faster than mine.Quote:
Originally Posted by Huigie
I did the vgpu mod and it seems to be working great. after i finished benching i put the resistance back up.
what is the highest recommended load volts for water cooling?
here is what i was getting
528mhz
1.42v 3D
1.21v 2D
550mhz
1.51v 3D
1.29v 2D
579mhz
1.56v 3D
1.34v 2D
After looking at this thread and others on different forums, it appears that some people have had issues using some of the mods for the 7800GTX (ie it has been rumoured at some places that these mods can result in a non-functioning card), whereas other people appear to have had success using these mods.
Can everyone/anyone who has done mods on their cards post here (or PM me) with information about which mods you followed (with a link to the mods), the result of the mods (ie if the mods were successful, and before/after clocks if known), and pictures of your modded card if possible.
By doing this, i'm hoping to clear up the confusion about whether these mods are correct, and to prove (or disprove) that they are working.
mod works, at least raises voltages anyway. I'm pretty sure VJ's ground was what did his card in. I've removed mods for 24/7 use...i don't like raising all three voltages at once...if a bios mod comes out that only deos the 2 3d clocks, or a mod for each mode, then i'll do it.
Ground is ground and the shorter you keep the connections to the ground plane the better.Quote:
Originally Posted by cadaveca
The card worked fine and looked great. It just wouldn't render using hardware. It had nothing to do with the volt mods.
Viper
The mods work just as intended. This isn't rocket science. All that is happening with them is altering the existing feedback circuit voltage dividers to reduce the voltage sensed at the feed back pin of the regulator. The regulator senses the lower voltage at the feedback and phases the mosfets on more to increase the target voltage at the PS output. This also increases the voltage at the feedback pin until the regulator is fat dumb and happy. Extremely basis stuff.Quote:
Originally Posted by persivore
What isn't known is the G70 tolerance to running with increased Vcore. It is well known the 6800's didn't like large moderate to large Vcore bumps. The cores on the 7800 might not be particularly like them either.
Viper
are u sure that its not some sort of throttleing? i found out that the forceware 77.76 drivers remove the issue on sub 35°C temps (80.40 dont btw) - maybe they could helpQuote:
Originally Posted by ViperJohn
I understand exactly how the mod works, and the the mods look as tho they should work perfectly fine to me, but I was trying to clear up the fact that I have seen many people (probably more than I've seen say that they actually work) say that the mods kill cards.Quote:
Originally Posted by ViperJohn
I was never doubting the fact that the mods weren't working, but I was trying to make it clear to people who were in doubt about the mods ;) .
Hi PersivoreQuote:
Originally Posted by persivore
The mods do work as intended and came from Jason57 through an undisclosed source. There was an NDA in effect for a while.
I haven't seen the other threads but the mods themselves wouldn't be killing the cards. To high a Vcore might as the G70's tolerance to Vcore increases isn't well known.
The NV40's were not particularly tolerant of high Vcore on average and the G70's may well be the same. The key is just what is the limit of the Vcore increase the core can handle and not the method of achieving it.
Be it making the regulator think the Vcore is low by lowering the voltage at the regulators feedback pin or changing the VID programming the end result is the same...increased Vcore to the GPU. As they say Vcore is Vcore is Vcore.
Can you point me to some of the other threads please?
Viper
isnt the g70 just a more optimized nv40 core? that means it may not have a high tolerance, or like some ati cards, it could possibly be vcore hungry.
The G40's (and most likely the G70's) didn't respond to more than about 9-10% Vcore increase. I had many G40 cards where the core OC went backwards with Vcore above 1.550 even on high end WC. Depending on the ATI core 17-20% is pretty standard before they wall up.Quote:
Originally Posted by W0nderb0y
The key with the G70's is most likely moderation when it comes to increasing the Vcore.
Viper
IMO the mods are working fine. I have also recieved some pm's about the mods. I really think the main problem might be that some have done the mods and thrown on H2O cooling then had a worse score or bench. This being due to thermal throttleing (the modded bios on these forums worked for me) (apparently a set of non-fm approved drivers also works). Or pushing the OC too far causing the card to downclock. Just my opinion. :)
These are some of the threads that I remember seeing...I think there might have been some more somewhere, but I can't remember where.
http://www.ocxtreme.org/forumenus/showthread.php?t=675
http://www.xtremeresources.com/forum...ad.php?t=37362 (I'm not sure if there's anything about mods killing cards here)
http://xtremeresources.com/forums/sh...ad.php?t=37563
Thanks for confirming that the mods are working Harleybro...Hopefully that will help people if they were in doubt about the mods :)
Thanks for the links and will read through them.Quote:
Originally Posted by persivore
What we need is a database of the Vcore's run so we can see at what level problems start to show up from the Vcore being to high.
Viper
Okay just ran through the forums. I just love the instant engineers with there lack of knowledge, rampant speculation and wild jumps to conclusions. Every volt mod picture I have seen are the same as above with only different points for the ground pickup and of course ugly leads that pickup and inject EMI/RFI noise directly into the regulators feedback circuit.Quote:
Originally Posted by persivore
Viper
Quote:
Originally Posted by ViperJohn
actually, i'm pretty sure most of the pics out there are yours.....lol
the rest are with different grounds. Thought maybe your ground caused a bit of feedback on that phase, but i don't know nothing. :fact:
I have seen my pictures several times. The mods themselves kindly came from Jason57 after the NDA ran out. Now the only company that I could imagine having an NDA on a 7800 volt mod would be nVidia lol. The mods are most likely straight out of the lab. They are pretty straight forward when you trace the circuits out.Quote:
Originally Posted by cadaveca
Viper
yeah, i guess. i was advised psenn, psenp, and grounded on the chip itself. ;) had to figure the rest out myself. But you did that for me. thanks.
Quote:
Originally Posted by happyhero
why is it such a big secret?????????
3d teams getting more competetive now :D
-CaT
all the teams already know how to do the mod! so why not share?Quote:
Originally Posted by CaTalyst.X
My thought exactly.Quote:
Originally Posted by cheap
lo there, right ive got a quick question, im tryin 2 track down some 200ohm VRs here in the UK but i jus aint avin any luck, all i can find is 200R VRs 15 turn pots, is this the correct value?Quote:
Originally Posted by ViperJohn
shigs
Yu got a URL on those so I can look at them???Quote:
Originally Posted by shigs
Viper