SW Power Cap GTX1080

[EdInk]

How do I remove this cap that gets flagged when I load GPU?
I've done a fresh Win10 install, flashed GPU BIOS using nvflash64 in the OS. Changed PCIe cable.

What else is there to try? My card wont boost past 800Mhz with 3dmark loaded or any games I play.

 

[Vayra86]

I believe you need a so called shunt mod for this. If you are ready to throw the card away, by all means google it

There are no software hacks as far as I know. These GPUs are indeed power locked and limited. For good reasons mostly.

 

[EdInk]

I believe you need a so called shunt mod for this. If you are ready to throw the card away, by all means google it

There are no software hacks as far as I know. These GPUs are indeed power locked and limited. For good reasons mostly.

My card won't boost past 800mhz...OP updated

 

[Vayra86]

My card won't boost past 800mhz...OP updated

Nice so you already bricked it! This is not how the card is delivered and bios flashing is generally counter productive.

Flash it back to a working bios and stop screwing around...

 

[agent_x007]

You can't BIOS flash Pascal cards with modified BIOS, ONLY official releases will work, and those in 99% of the cases won't solve this problem (which is hardware based).

I guess it may be the result of shunt resistor damage (do you get "Pwr" in GPU-z as perf limit reason, when you try doing something ?).
If so, disassemble the card and check resistance on all shunts.

 

[EdInk]

You can't BIOS flash Pascal cards with modified BIOS, ONLY official releases will work, and those in 99% of the cases won't solve this problem (which is hardware based).

I guess it may be the result of shunt resistor damage (do you get "Pwr" in GPU-z as perf limit reason, when you try doing something ?).
If so, disassemble the card and check resistance on all shunts.

Thanks, I'll try that. It does show pwr on GPU-z too.

 

[Vya Domus]

It's a hardware problem, can't be fixed as far as I know.

 

[newtekie1]

Install MSI Afterburner and try turning up the Power Limit. It probably won't fully fix the problem, but it should at least make it better.

 

[lsevald]

You should not try this on your card (!), at least not before you have fixed the issue(s) triggering your power limit, as this will remove the protection saving your card from potentially burning up. And if it's air cooled, you should not try it at all, as the card will not throttle and protect itself as normal. I also believe this has pretty much made the shunt mod obsolete.

But I just wanted to mention that there are XOC bioses for some of the Pascal cards (Asus Strix models, but works on some other cards too) that removes the power limit entirely, and also unlocks Vgpu all the way up to 1.200V. These BIOS'es are leaked versions meant for extreme overclocking (LN2). I use a XOC bios on my water cooled Palit 1080ti, and at 1.200V and 2150MHz, it can easily pull up to 450Watts, too much for air cooling, and probably also getting up there considering the power delivery to the card itself. Just wanted to mention it as an alternative to the shunt mod, which is also dangerous. But I mean, if you have a fire extinguisher besides you, and are prepared to lose all your gear...

 

[eidairaman1]

How do I remove this cap that gets flagged when I load GPU?
I've done a fresh Win10 install, flashed GPU BIOS using nvflash64 in the OS. Changed PCIe cable.

What else is there to try? My card wont boost past 800Mhz with 3dmark loaded or any games I play.

Get the original bios back on the card and get the bios link from the vga bios collection by attempting to upload your bios through gpu-z and white sticker pictures from your card. I will help you try and find a bios with a higher power limit.

 

[EdInk]

You should not try this on your card (!), at least not before you have fixed the issue(s) triggering your power limit, as this will remove the protection saving your card from potentially burning up. And if it's air cooled, you should not try it at all, as the card will not throttle and protect itself as normal. I also believe this has pretty much made the shunt mod obsolete.

But I just wanted to mention that there are XOC bioses for some of the Pascal cards (Asus Strix models, but works on some other cards too) that removes the power limit entirely, and also unlocks Vgpu all the way up to 1.200V. These BIOS'es are leaked versions meant for extreme overclocking (LN2). I use a XOC bios on my water cooled Palit 1080ti, and at 1.200V and 2150MHz, it can easily pull up to 450Watts, too much for air cooling, and probably also getting up there considering the power delivery to the card itself. Just wanted to mention it as an alternative to the shunt mod, which is also dangerous. But I mean, if you have a fire extinguisher besides you, and are prepared to lose all your gear...

View attachment 148892View attachment 148894

Lool @extinguisher. My card is on a waterblock. If I can't get it fixed, I do some experiments with the XOC BIOS.

Get the original bios back on the card and get the bios link from the vga bios collection by attempting to upload your bios through gpu-z and white sticker pictures from your card. I will help you try and find a bios with a higher power limit.

I don't understand "white sticker pictures". My card uses a waterblock and backplate now and I'm not sure I remember seeing some white stickers 4 years ago. Should I still attempt uploading BIOS using GPU-z?

Install MSI Afterburner and try turning up the Power Limit. It probably won't fully fix the problem, but it should at least make it better.

Tried, no luck

 

[eidairaman1]

Lool @extinguisher. My card is on a waterblock. If I can't get it fixed, I do some experiments with the XOC BIOS.


I don't understand "white sticker pictures". My card uses a waterblock and backplate now and I'm not sure I remember seeing some white stickers 4 years ago. Should I still attempt uploading BIOS using GPU-z?


Tried, no luck

The card has stickers on back of card take pics of those, otherwise get the link to your original bios

 

[EdInk]

The card has stickers on back of card take pics of those, otherwise get the link to your original bios

My original BIOS validation

TechPowerUp

www.techpowerup.com

 

[eidairaman1]

My original BIOS validation

TechPowerUp

www.techpowerup.com

Ok so you have a FE board.

I would try these bios for now see how the card handles the performance (make sure it boosts up to those speeds continuously)

Inno3D GTX 1080 VBIOS

8 GB GDDR5X, 1709 MHz GPU, 1251 MHz Memory

www.techpowerup.com

Gainward GTX 1080 VBIOS

8 GB GDDR5X, 1658 MHz GPU, 1251 MHz Memory

www.techpowerup.com

If you want to push further look at this info in each file and make sure it is there

Connectors
1x DVI-D
1x HDMI
3x DisplayPort

Board power limit (make sure it isn't too high, we are starting you off with 230W and 250W, some go as high as 350W but they were built to handle that load, FE is reference) if you want to experiment-test them and if no good put a lower power bios back on.

Look at the Clock speeds too.

These are verified files that match your cards dev ID and SSID.

TechPowerUp

Extensive repository of graphics card BIOS image files. Our database covers submissions categorized by GPU vendor, type, and board partner variant.

www.techpowerup.com

Unverified list

TechPowerUp

Extensive repository of graphics card BIOS image files. Our database covers submissions categorized by GPU vendor, type, and board partner variant.

www.techpowerup.com

 

[lsevald]

Was the card ever shunt modded? I know some of those modded cards failed due to the use of liquid metal to alter the resistance of the current sense resistors, which led to the liquid metal softening the solder points of the resistors. If you got it second hand, I would inspect those, as it could easily mess up the power draw readings for your card.

 

[eidairaman1]

Was the card ever shunt modded? I know some of those modded cards failed due to the use of liquid metal to alter the resistance of the shunt resistors, which led to the liquid metal softening the solder points on the shunt resistors. If you got it second hand, I would inspect those, as it could easily mess up the power draw readings for your card.

I doubt it has.

Shunt means parallel btw.

 

[lsevald]

I remember watching this video a while back regarding the shunt mod, and it was kinda funny as he initially thought it was nvidias fault for using bad solder

 

[eidairaman1]

I remember watching this video a while back regarding the shunt mod, and it was kinda funny as he initially thought it was nvidias fault for using bad solder

Anyways this guy hasn't been back on recently so carry on lol

 

[EdInk]

Ok so you have a FE board.

I would try these bios for now see how the card handles the performance (make sure it boosts up to those speeds continuously)

Inno3D GTX 1080 VBIOS

8 GB GDDR5X, 1709 MHz GPU, 1251 MHz Memory

www.techpowerup.com

Gainward GTX 1080 VBIOS

8 GB GDDR5X, 1658 MHz GPU, 1251 MHz Memory

www.techpowerup.com

If you want to push further look at this info in each file and make sure it is there

Connectors
1x DVI-D
1x HDMI
3x DisplayPort

Board power limit (make sure it isn't too high, we are starting you off with 230W and 250W, some go as high as 350W but they were built to handle that load, FE is reference) if you want to experiment-test them and if no good put a lower power bios back on.

Look at the Clock speeds too.

These are verified files that match your cards dev ID and SSID.

TechPowerUp

Extensive repository of graphics card BIOS image files. Our database covers submissions categorized by GPU vendor, type, and board partner variant.

www.techpowerup.com

Unverified list

TechPowerUp

Extensive repository of graphics card BIOS image files. Our database covers submissions categorized by GPU vendor, type, and board partner variant.

www.techpowerup.com

I'll give this a try. Thanks

Was the card ever shunt modded? I know some of those modded cards failed due to the use of liquid metal to alter the resistance of the current sense resistors, which led to the liquid metal softening the solder points of the resistors. If you got it second hand, I would inspect those, as it could easily mess up the power draw readings for your card.

I got it used in 2017. I've had a look online re: shunt mod, checked shunt resistor, no signs.

 

[EdInk]

Soooooo. I poked my shunt resistor and it fell off

You should not try this on your card (!), at least not before you have fixed the issue(s) triggering your power limit, as this will remove the protection saving your card from potentially burning up. And if it's air cooled, you should not try it at all, as the card will not throttle and protect itself as normal. I also believe this has pretty much made the shunt mod obsolete.

But I just wanted to mention that there are XOC bioses for some of the Pascal cards (Asus Strix models, but works on some other cards too) that removes the power limit entirely, and also unlocks Vgpu all the way up to 1.200V. These BIOS'es are leaked versions meant for extreme overclocking (LN2). I use a XOC bios on my water cooled Palit 1080ti, and at 1.200V and 2150MHz, it can easily pull up to 450Watts, too much for air cooling, and probably also getting up there considering the power delivery to the card itself. Just wanted to mention it as an alternative to the shunt mod, which is also dangerous. But I mean, if you have a fire extinguisher besides you, and are prepared to lose all your gear...

View attachment 148892View attachment 148894

You seem to have replaced your shunt completely or have zero ohms across it. Your power draw is soo low for that clockspeed.

 

[lsevald]

Soooooo. I poked my shunt resistor and it fell off

So it was likely shunt modded with liquid metal at some point? As in the video I linked a few posts up?

You seem to have replaced your shunt completely or have zero ohms across it. Your power draw is soo low for that clockspeed.

What power draw reading are you referring to? My card is stock, only water block and XOC bios added. MSI Kombustor is fairly light load wise, here's a quick run and it's at 360Watts plus according to HWiNFO64:

 

[EdInk]

So it was likely shunt modded with liquid metal at some point? As in the video I linked a few posts up?



What power draw reading are you referring to? My card is stock, only water block and XOC bios added. MSI Kombustor is fairly light load wise, here's a quick run and it's at 360Watts plus according to HWiNFO64:

The number in the cmd window but I guess thats wrong

 

[lsevald]

I often lock my clocks at max in Afterburner, so they don't clock down when idle, so that nvidia-smi report reading was at idle and max clocks, sorry for the confusion

 

[EdInk]

I often lock my clocks at max in Afterburner, so they don't clock down when idle, so that nvidia-smi report reading was at idle and max clocks, sorry for the confusion

View attachment 149524

Ah I see where the confusion was, thanks for clarifying.

Interesting v/f curve. Did you adjust that or did that come with the xoc BIOS? Nice result you've got there. Do you run this OC 24/7?

I've resulted in using a piece of thick solder to bridge the contacts of the shunt resistor. the resistor fell off when I poked it.

So, for now, it boosts up to 1936mhz but only downclocks to 1151mhz.

 

[lsevald]

Thanks It's very stable at 2150, but I usually run it at 2100 because I prefer stability over performance. The curve is manually edited, it only takes a few minutes to make one. You probably know this but shift and arrow keys are your friends, L to lock card to a selected node, remember to apply afterwards. The XOC bios have some lower nodes on the curve that I suspect aren't stable on my card, I had a couple of glitches playing youtube videos (card clocks to 1500MHz range) and such, so I dropped the entire curve 50MHz for those lower speeds just to be sure. A bit like that super stable CPU overclock that passes anything you throw at it, only to fail miserably and freezing while opening chrome


Crazy clocks for 0.875V? Is it stable at 1936MHz? And that downclock seems strange? What does the curve look like? The card is now shunt modded and on XOC bios? Is it only partially shunt modded? as I believe there are 3 current sense resistors (one for each PCI-E power plug and one for the PCIe slot). Personally I would solder the resistor back on if possible, but I guess the amount of current going through it requires a good solder, so it might be hard to do...