Dead Rx480

[Bluedog69]

I have an old RX480 i trying to get going,
It has a ground on the two main fuses.
Causing this i believe it is the IR 3553M C610P 3RR3 chip
Watching this video helped, its the same fault https://youtu.be/R8zXFcxyWc0
I also need a 5KW20 270 16V capacitor
I am unable to locate these to buy, and have no idea how to remove the IR3553M chip. i just cant seem to melt any solder on the board, tried x3 irons
I attached some picture of required parts.
Thanks

[foshland]

Re: Dead Rx480

Hi, about soldering and desoldering in graphics cards, they are made to disipate a lot of heat, so with a normal iron will be not enough, you will need, of course a hot air station, for soldering those kind of multi-leg ics, and still maybe not enugh, since the are soldered with solder without Pb (lead), wich needs more heat to become liquid.

The best option I use is a hot-bed, they are cheap and are selled in aliexpress for about 10$, you put the card on it, heat the card and it helps a lot to desolder the factory solder.

Ill put a link to the one I bought, but I dont know if it will be spam, so if needed PM me.

Hope it helps

Edit: Of course you will need a good flux for soldering and a good solder too

[Bluedog69]

Re: Dead Rx480

Hello,
I have ordered a hot air soldering iron and a hot bed (thanks foshland)
Just not sure if i can use these chips and caps
the cap is a 5KW20 270 16V and the IR is 3553M C610P 3RR3

AliExpress said to use this IR IR3553M IR3553MPBF IR3553MTRPBF PQFN-25 New Original Genuine IC Chip

I found this Cap 16V270UF 8x8

Will these be ok to use.

Thanks

[RethoricalCheese]

Re: Dead Rx480

Just wondering, why do you think you need a new capacitor?

[Bluedog69]

Re: Dead Rx480

Because my son snapped it off

[RethoricalCheese]

Re: Dead Rx480

Okay then.

16V 270uF is are the values. So look for those, ignore other numbers.
Package size and low ESR would be the next things to look at.

The chip is indeed IR3553M so ignore other numbers.

[Bluedog69]

Re: Dead Rx480

Ok thanks for checking that.
Just hope i can solder the IR on, looks fiddly

[RethoricalCheese]

Re: Dead Rx480

Yup, these chips can be a pain. Usually I don't use a preheater for GPU-s but for these chips, it's best to use one.

[Bluedog69]

Re: Dead Rx480

I removed four IR chips and tested for ground after each one, the ground disappeared after removing the fourth chip.
Then i noticed a tiny resistor or fuse had come off next to one, ill post a pic, if anyone can let me know what it is that would be great.
Thanks for your reply's so far.

[foshland]

Re: Dead Rx480

Hi, what make and specific model is your card? for looking for a board diagram or boardview, it would help.

As you can see, all the IR3553M has a similar capacitor, and if you like electronics, its the time to get a capacitance meter (Ali is your friend), so you can meassure the others one and buy a bunch of them similar size and capacity very cheap. But if you find or tell a model of the board maybe there is a schematics telling you all the data needed for ordering just the capacitor.

[Bluedog69]

Re: Dead Rx480

Hello,
Its a Sapphire Nitro RX480 8Gig,
Its been sitting in the cupboard for a couple of years,
It died and was one month out of warranty, they wouldn't cover it.
Ali is good but the postage is sooo sloow, the capacitors i ordered are arriving end of February.

[Beton]

Re: Dead Rx480

May I ask what kind of pre-heater you bought? I can't find any for $10.
If you can't use a link here then a search word for aliexpress would be good.
Thanks.

[foshland]

Re: Dead Rx480

Hi, search on Ali, LUXIANZI preheater, I bought the 500W one, 14 Euros, maybe near 20 dollar, but for sure a helper in GPUs

[Bluedog69]

Re: Dead Rx480

https://www.aliexpress.com/item/4001...53476695%22%7D
still waiting for mine,
the hot air soldering iron came quick though.

[Bluedog69]

Re: Dead Rx480

Hello,

I replaced the IR3353 chips and the two blown fuses
All grounds were gone.
I plugged it in and all the fuses blew and x3 IR chips went to ground.
I replaced the 3 IR chips and blown fuses, no grounds again.
plugged it in again and the IR chips were arcing, didn't blow any fuses.

Any ides, ill link a video i took.

Even the spot that has no IR chip is Arcing.
and yes the bottom cap is just temp..

[Bluedog69]

Re: Dead Rx480

Video link
https://imgur.com/t9RXvCF

[wichrys]

Re: Dead Rx480

Have you check 3567 before?
3567 control 4x3553, and you have only 3 blowed.

[Bluedog69]

Re: Dead Rx480

I ended up changing all the IR3553