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Old 01-25-2022, 12:13 PM   #1
dicky96
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Default Gigabyte GV-N98TWF3 OC GTX 980 ti - missing components can anyone identify?

Hi Guys I have a Gigabyte GV-98TWF3OC-6GD Graphics card

Someone has made a botched attempt at replacing a couple of components . The guy I bought it from says they got broken off when the middle fan was replaced. The middle fan definitely looks like a replacement so maybe that is true.

I cleaned up the mess and it looks like an inductor 'LB6' was broken off (if this was originally fitted) and also capacitor C57. I'm more worried about the inductor than the capacitor to be honest.

It also looks like a track that runs under the capacitor could be damaged, but I can deal with that.

See pics - and I hope someone can help me out here.

Rich
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Old 01-26-2022, 03:31 AM   #2
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Default Re: Gigabyte GV-N98TWF3 OC GTX 980 ti - missing components can anyone identify?

I have one of these at home, I'll have a look after work.
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Old 01-26-2022, 11:43 AM   #3
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Default Re: Gigabyte GV-N98TWF3 OC GTX 980 ti - missing components can anyone identify?

Well LB6 is certainly present, I can bodge together an lc tank circuit and measure with scope of you need me to?
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Old 01-28-2022, 11:19 AM   #4
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Default Re: Gigabyte GV-N98TWF3 OC GTX 980 ti - missing components can anyone identify?

That would be really helpful if you could It must be a very low inductance, possibly not even necessary (maybe I can just use a ferrite bead type inductor from a scrap motherboard?

Can you tell me the value for C57 also?
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Old 01-28-2022, 11:29 AM   #5
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Default Re: Gigabyte GV-N98TWF3 OC GTX 980 ti - missing components can anyone identify?

Ahhaaaa - the capacitor is 4.7uF

This part of the schematic is the same as the reference card

The LB6 inductor just says BEAD - any suggestions what I could put there? I'm not sure it is even necessary, maybe just a piece of wire or 0 ohm resistor would do. Or look on some scrap boards (I have several GTX 780 scrap) for something similar or just buy some of these?

https://www.aliexpress.com/item/1005...883bbae26cd4-1
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Last edited by dicky96; 01-28-2022 at 11:31 AM..
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Old 01-28-2022, 05:11 PM   #6
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Default Re: Gigabyte GV-N98TWF3 OC GTX 980 ti - missing components can anyone identify?

Probably mostly there to look good, so better replace it with something that looks the part
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Old 01-28-2022, 07:16 PM   #7
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Default Re: Gigabyte GV-N98TWF3 OC GTX 980 ti - missing components can anyone identify?

Quote:
Originally Posted by dicky96 View Post
Ahhaaaa - the capacitor is 4.7uF

This part of the schematic is the same as the reference card

The LB6 inductor just says BEAD - any suggestions what I could put there? I'm not sure it is even necessary, maybe just a piece of wire or 0 ohm resistor would do. Or look on some scrap boards (I have several GTX 780 scrap) for something similar or just buy some of these?
The 4V-rated cap, throws me off!
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