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2080 Ti - Working Shunt Mod

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post #61 of 140 (permalink) Old 02-06-2019, 06:51 AM
 
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Quote: Originally Posted by Asmodian View Post
I will never try to RMA my cards after doing this mod.
Thanks for the information. I also appreciate the ethical stance.

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post #62 of 140 (permalink) Old 02-06-2019, 08:40 AM
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post #63 of 140 (permalink) Old 02-06-2019, 09:50 AM - Thread Starter
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Quote: Originally Posted by Ensavier View Post
Out of curiosity, do you know how shunt mods like this affect the lifespan of the card? I'm curious about doing these but I want a GPU to last me at least 3 years usually since I use my older ones for algorithm testing.
As long as temps are kept under control I don't think it hurts longevity at all. Extra voltage is what hurts longevity the most; don't go above 1.05V or so if you want to maximize longevity.
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post #64 of 140 (permalink) Old 02-06-2019, 09:56 AM - Thread Starter
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Quote: Originally Posted by Renegade5399 View Post
Now, you only had to do this mod to the 2 shunts pictured? There is a third for the PCIe power correct? I know on the Titan V you had to mod that one as well since it ended up having a connection back to the +12V on the 8 pin power connector.
On these we do not want to mod the third shunt. If you do the card will be stuck in safe mode even if you use 0.008 ohm resistors, as reported by MrFox.
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post #65 of 140 (permalink) Old 02-06-2019, 10:34 AM
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Quote: Originally Posted by Asmodian View Post
I finally got a chance to test some other shunts on my FE 2080 Ti.

When using 5 mOhm resistors, as I did on my Titan X (Pascal), the 2080 Ti goes into emergency mode with a lot of loads (stuck at 300 MHz). My first try adding a shunt above 5 mOhms, 8 mOhms, did not trigger the cards safety mode. I used Panasonic ERJ-M1WSF8M0U current sense resistors, which match the original resistors on the card.

This is not bad, 1/5 + 1/8 = 1/3.077, for a final power limit of 1.625 * 260 = 422.5 watts (520W at 123%).
Edit: My Kill A Watt's reported power draw tracks well with what hwinfo reports for power use (x1.625) so I believe my mod worked as expected and I can use hwinfo to get a fairly accurate value for the card's powder draw.




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Thank you for making this guide and for proper testing. I have ordered 4x 8mOmhs to have this mod done to my FE 2080Ti on H2O.

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post #66 of 140 (permalink) Old 02-11-2019, 07:58 AM
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so my FE card does 2160 very stable under water with a 380 kfa mod bios.

would I see any benefit from doing this mod?

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post #67 of 140 (permalink) Old 02-11-2019, 01:05 PM
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I tried to shunt my card but the solder wouldn't stick so I'm guessing I need to get some flux. Is there any particular kind I should get for electronic components or will any flux do?

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post #68 of 140 (permalink) Old 02-12-2019, 06:16 AM
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Quote: Originally Posted by Lashmush View Post
I tried to shunt my card but the solder wouldn't stick so I'm guessing I need to get some flux. Is there any particular kind I should get for electronic components or will any flux do?
You shouldn't need flux on such a new PCB I would imagine. If the solder isn't 'sticking' my first thought would be perhaps it isn't getting hot enough?

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post #69 of 140 (permalink) Old 02-12-2019, 06:20 AM
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Quote: Originally Posted by Kalm_Traveler View Post
You shouldn't need flux on such a new PCB I would imagine. If the solder isn't 'sticking' my first thought would be perhaps it isn't getting hot enough?
I had my temp at like 300 to 350c. It stuck to the new resistor but not the pcb resistor. My boss is gonna lend me his flux tomorrow and I'll have another go at it.

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post #70 of 140 (permalink) Old 02-12-2019, 12:05 PM
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Asmodian, I ended up shunting it 8mhom on top, I just couldn't get a bios to flash without mismatch ID.
Its just me! I would have ended up doing some mod to it ,
hey! check my first run on superposition 8k extreme its close to yours hahaha.
I would have put a smiley face there but they have disappeared from desktop?
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