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Radeon - Inductor Replacement

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First post, by gabimor

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Hi friends, thanks for reading my post.

Three weeks ago, I bought a Radeon 9550, cause I thought it could reach 9600 XT performance.

It has a RV360 GPU, but VRAM is 3.3ns, and not 2.8ns.

I'll try a pencil voltmod in the voltage regulator to feed more voltage to the VRAM. Maybe I can reach 350mhz, or maybe 325mhz. Now I can reach about 290mhz.

One of the inductors was strange, very bent. It is working, but I don't like the visual condition.

I can try to fix, but I want to replace it.

Do you know what's the specification of the inductor in the attached picture?

Do I have to buy another with the exactly inductance, or can I buy something with a little more or less inductance?

Thank you!

Reply 1 of 4, by analog_programmer

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So, it works and it looks like the other inductor seen on the last picture... Just straighten its legs a little, solder it back to its place and don't bother with such a meaningless nonsense.

The word Idiot refers to a person with many ideas, especially stupid and harmful ideas.
This world goes south since everything's run by financiers and economists.
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Reply 2 of 4, by momaka

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analog_programmer wrote on 2025-02-07, 02:49:

So, it works and it looks like the other inductor seen on the last picture... Just straighten its legs a little, solder it back to its place and don't bother with such a meaningless nonsense.

+1
Agreed.

If it works and if it doesn't burn your finger when the card is running, leave it alone.
Finding a proper replacement inductor that is not so trivial. Aside from the inductance, you also need to make sure the new one is rated for the same or higher saturation current. If you get one that isn't, its inductance will fall and its core will overheat - NOT GOOD! On top of that, there are different types of ferrite cores. Generally, "H" type inductors like this don't have cores that are too different, but the toroidal ones can be... and that opens another whole can of worms.

What you might want to change is that stupid sleeveless electrolytic caps that has "FZ" written on top of it. They go out like firecrackers. This is like the 5th time I see someone buy a card this week with these stupid c[r]aps. See post here:
Re: Brand NEW nVidia Geforce FX5500 256MB
That said, is this "FZ" cap was original to your card? If yes, then you might have a no-name China-fabbed card on your hands.

Reply 3 of 4, by gabimor

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momaka wrote on 2025-02-07, 23:23:
+1 Agreed. […]
Show full quote
analog_programmer wrote on 2025-02-07, 02:49:

So, it works and it looks like the other inductor seen on the last picture... Just straighten its legs a little, solder it back to its place and don't bother with such a meaningless nonsense.

+1
Agreed.

If it works and if it doesn't burn your finger when the card is running, leave it alone.
Finding a proper replacement inductor that is not so trivial. Aside from the inductance, you also need to make sure the new one is rated for the same or higher saturation current. If you get one that isn't, its inductance will fall and its core will overheat - NOT GOOD! On top of that, there are different types of ferrite cores. Generally, "H" type inductors like this don't have cores that are too different, but the toroidal ones can be... and that opens another whole can of worms.

What you might want to change is that stupid sleeveless electrolytic caps that has "FZ" written on top of it. They go out like firecrackers. This is like the 5th time I see someone buy a card this week with these stupid c[r]aps. See post here:
Re: Brand NEW nVidia Geforce FX5500 256MB
That said, is this "FZ" cap was original to your card? If yes, then you might have a no-name China-fabbed card on your hands.

Yes' it's China-fabbed, from Gecube. The performance, with some tweaks, is like my Gigabyte 9600 Pro.

The problem with the inductor is solved.

The FZ cap is original.

Thank you for your help.

Reply 4 of 4, by gabimor

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analog_programmer wrote on 2025-02-07, 02:49:

So, it works and it looks like the other inductor seen on the last picture... Just straighten its legs a little, solder it back to its place and don't bother with such a meaningless nonsense.

The problem with the inductor is solved, thanks for your help.

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