Bricked gpu

[Vojke]

I had a failed flash on my Rx 580 phantom gaming d 8gb from Asrock and it hasn't been working since,only the fans work but system can't boot with it nor display picture,so I'm thinking of using  the bios programmer to try flashing the bios i backed up externally,but I need help locating the bios chip on back of the gpu,i circled only 2 I could find,lower one is named U11 and upper one is U2,so if anyone could help me out locating the correct chip would be extremely helpful.

[mariushm]

What does it say on the chips ?

Lick your finger then rub the finger across the surface and look from various angles, you should be able to read the printing on the chips. 

 

U11 (by pci-e slot) is more likely than the other, the other has a jtag header (or something like that) near it and too many passives around it to "feel" like a bios chip. 

 

You should be able to use another video card as primary and see if the RX card is at least detected in Windows in ATiFlash : https://www.techpowerup.com/download/ati-atiflash/

 

[Vojke]

I'm not sure if I read them correctly since it's really difficult to see,but this is what I think it said,on U2 the codes are gs7256 0gy089nu0,u11 had 3 lines of codes and those should be hh1732 25q40ct ap0x830. Sadly I don't have neither igpu or second pci-e slot so I was thinking of using the bios programmer to attach the clip onto the chip and use the backed up bios I have of said card,so I'm wondering would it work to externally flash it with programmer and then test it?

 

[kelvinhall05]

6 minutes ago, Vojke said:

I'm not sure if I read them correctly since it's really difficult to see,but this is what I think it said,on U2 the codes are gs7256 0gy089nu0,u11 had 3 lines of codes and those should be hh1732 25q40ct ap0x830. Sadly I don't have neither igpu or second pci-e slot so I was thinking of using the bios programmer to attach the clip onto the chip and use the backed up bios I have of said card,so I'm wondering would it work to externally flash it with programmer and then test it?

 

Between those two, U11 is gonna be the BIOS chip, but it's possible there is another flash chip on the other side of the board.

[Vojke]

4 minutes ago, kelvinhall05 said:

Between those two, U11 is gonna be the BIOS chip, but it's possible there is another flash chip on the other side of the board.

Should I try taking off the heatsink to check and if so is it safe to?

[mariushm]

The 25q40ct  is probably the bios chip ... See similarly named chip from GigaDevice : GD25Q40C.pdf

 

Yes, it's safe to unscrew the heatsink... just make sure you don't lose springs, spacers, and don't go nuts when you tighten everything back. 

 

Also if you do remove the heatsink, it would be a good idea to clean the old thermal paste with some solvent (isopropyl alcohol , sanitary/regular alcohol, acetone) but if you don't have any some paper towels wet with water would do ... and apply fresh solder paste.

In fact you'll probably HAVE TO apply new paste if you remove the heatsink ... the old paste may be powder like, dry etc...

 

 

//gs7256 is a buck regulator (dc-dc converter) https://www.taiwantrade.com/product/gs7256-5v-12v-single-synchronous-buck-controller-828813.html

 

 

[Vojke]

14 minutes ago, mariushm said:

The 25q40ct  is probably the bios chip ... See similarly named chip from GigaDevice : GD25Q40C.pdf

 

Yes, it's safe to unscrew the heatsink... just make sure you don't lose springs, spacers, and don't go nuts when you tighten everything back. 

 

Also if you do remove the heatsink, it would be a good idea to clean the old thermal paste with some solvent (isopropyl alcohol , sanitary/regular alcohol, acetone) but if you don't have any some paper towels wet with water would do ... and apply fresh solder paste.

In fact you'll probably HAVE TO apply new paste if you remove the heatsink ... the old paste may be powder like, dry etc...

 

 

//gs7256 is a buck regulator (dc-dc converter) https://www.taiwantrade.com/product/gs7256-5v-12v-single-synchronous-buck-controller-828813.html

 

 

Since I've never removed the heatsink nor used thermal paste,would mx4 4g be enough to replace the old one?

[mariushm]

1 hour ago, Vojke said:

Since I've never removed the heatsink nor used thermal paste,would mx4 4g be enough to replace the old one?

Yeah, it's fine. As long as it's anything better than cheap silicon grease, you'll be fine.

[Vojke]

21 hours ago, mariushm said:

Yeah, it's fine. As long as it's anything better than cheap silicon grease, you'll be fine.

Sorry for the late response,but is it enough to change thermal paste and leave thermal pads as it is for time being?

 

[Vojke]

I managed to open up the gpu and cleaned the old paste,applied new one after the picture but I think I might've made a smudge on the green area around the chip so should I redo the entire process or leave it as it is?