Is it really impossible to bios mod it to 1.55V?
I dont know if i want to start hardmodding this card, if it gets broken there is alot of money wasted for me :(
I have the 1.5V mod right now, and it gets up to 495/1220 stable.
Printable View
Is it really impossible to bios mod it to 1.55V?
I dont know if i want to start hardmodding this card, if it gets broken there is alot of money wasted for me :(
I have the 1.5V mod right now, and it gets up to 495/1220 stable.
If you can't afford to replace it you should not be messing with the voltage.:nono: :slapass:Quote:
Originally Posted by bAdboLL
Well, is the mod very difficult to do?
I dont want to do the memory mod but i could do the gpu mod.
How many have succeded with their mods? From what i understand, the chanses of messing the card up by just change the volt from 1.5 to 1.6 isnt very large, right?
Is there any GOOD "How-to?" out there? With good pics ;)
Thanks for the help btw!
There is a link for the how to in the first post of this thread. If your not any good at soldering don't try it. Find someone else who can do it for you without killing the card. There are quit a few people who chimed in on this thread who could help you. VJ (ViperJohn)is one he also may be able to direct you to someone else if he can't help you.
any power mods for that?
power mod for 6800: http://www.xtremesystems.org/forums/...d.php?p=674226
Just did vgpu mods on my 7800GT SLI setup :D
before: 491 max
after: 527 max (hardly)
bottom card sucks, need a better than stock cooler. I'm at 1.525v now. Took me from 475 to 500mhz 24/7 no artifact stable. Ordering another zalman then up with the volts. IS 1.65v 24/7 safe? What about vdd? I'm going to do that soon as well.
I know several guys running 1.7v Core and 2.3v Memory with Zalman's... They are running it 24/7, however, I'm not sure how safe it is :)Quote:
Originally Posted by afireinside
You guys have a link to buy these variable resistors? Or should i just go down to my local electronics store and pick them up there. Perhaps Fry's. When i v-modded my 9700pro a few years back i went to a mom and pop store and modded the crap out of it. I was running over 9800xt speeds with the thing. :)
frys electronics will have the pots your searching for.
Radioshack also has them.
Cool. I got the 10k and 5k variable resistors like i saw the guys using at VR-Zone and though i've done voltage mods, i've never used a variable resistor. I've always used the regular ones you solder on like when i v-modded the gpu and memory on my 9700pro. What kind of impedience should i have them set to as measured by my multi-meter before i go wiring everything up. I don't wanna fry my card by having them set wrong.
This is how i did my last video card v-mod.
http://www.kalionzes.com/computers/9700provolt1.jpg
http://www.kalionzes.com/computers/9700provolt1.jpg
could that kind of v-mod be done on a bfg 7800gt?
yup! :D
Im using this cooler on my 7800GT right now;
http://hem.bredband.net/badboll/zalman1.jpg
http://hem.bredband.net/badboll/zalman2.jpg
http://hem.bredband.net/badboll/zalman4.jpg
http://hem.bredband.net/badboll/zalman6.jpg
http://hem.bredband.net/badboll/zalman3.jpg
Load temp is around 47c, i never pushed the temp above 50.
Nice air cooling i think :)
Do you think it's safe to do a soldering voltagemod now?
Around 1.65V should be safe, right?
Right now i can only go to 501/1250 without any mods except the 1.5 bios.
Do i have to remove the 1.5V bios mod first?
And then i have som questions about the modding itself..
If i buy 2x 10K 20turns resistors, is that ok?
1 for GPU and one for MEM.
How do i know when i have changed from 1.4V to 1.65V etc?
What OHM for what voltage?
Many questions but i need help :)
:D one at a time.
IMHO, I wouldnt put 1.65V through the core on air cooling. I`d draw the line at around 1.5, but its your card, do what you like.
2x10K pots will be fine, but you might need to turn them a fair way down to get a voltage increase. I have a 20K for my memory, which is fine but a smaller one might be better for the core...5K maybe? Not 100% sure bout that, please dont hold me to it.
I dont think the BIOS mod will have to be removed, seeing as you`re bypassing it, but i`m not 100% sure about that either
You`ll need a multimeter to check the voltages, but if you werent sure about that, I`m not totally convinced you should be voltmodding. No offense, but theres a lot that can go wrong.
K
What Zalman is that???!?!?! How the HELL did you do that... And how does it not BREAK IN HALF LOL :banana:Quote:
Originally Posted by bAdboLL
I don't anything over 1.5v for the core, not that I trust 1.5v either :stick:
looks like a CNPS7000B-AlCu cpu cooler he cut some off of to make it work on a gpu. looks pretty interesting.
So what's the average OC you guys are gaining from this v-mod? I might have to go and get some new soldering tips.
Before vmod : 520core / 1200mem , After vmod : 600core / 1370memQuote:
Originally Posted by Coroner Kyle
Thanks Fosco, those are some very impressive numbers. I guess I just found my next mod. Time to break 8000 in 3D06 (8500 if I'm lucky.)
I know that i have to use a multimeter and i got one already. :)
But my temps with 1.5V biosmod is under 50 degrees load with this cooler, thats pretty ok and should handle more than 1.6V?
Hm so i should get a 5K for the core? Maby i'll do that, and a 10K for mems.
Actually i really dont want to add more voltage to my mems, so maby i'll just do the core to start with.
And about the cooler, almost all s939 coolers will fit on GT/GTX.
How so?Quote:
Originally Posted by bAdboLL
I also have a Zalman, full CU though, how would I go about mounting it onto the card, nonetheless keeping it upright
I think the distance between the mounting holes are the same as on 939.
Some guy has an zalman9500 on his 7800 for example, so its possible.
Had this lousy GT for awhile, and saw this thread yestarday. Got up this morning and modded the card and works perfectly. Ran it at 550/1200 and passed 9k in 05. Only wish ghetto infineon RAM on this thing clocked better.
http://members.shaw.ca/spicy/pub/DSC00515.JPG
Damn all of you and your high cores... I got the :banana::banana::banana::banana:tyest core clocker ever, even with 1.53volts I can't seem to get past 500... But my ram seems to like 1375 ;) Just needs more testing, perhaps better cooling...
Is that a water block I see?