Repair Sapphire R9 290X 4Gb

[sanny]

I think it's electronic capacitance.

[Cybrema]

I have measurement device. How about those U300 and U350? Is there any idea what those chips are for and is it possible that I caused disfunction by programming on those?

[Cybrema]

Ok. Card died. I sent it in service and there was mudman working. He broke attachment slide, cooler plastics and overheated the gpu. He was suppose to check two cards and tell if he could fix em. I told not to start without permission. The place was in Finland, Helsinki, Vuosaaren ATK. Too bad service! The guy took apart another card totally, so now it's not even fixable.

So I got another one to be fixed. There seems to be just some BIOS problem with this one. I allready got a BIOS pack for R9 290 from Sapphire and now im seeing a card with U2 and U3 BIOS chips. I just don't know which one goes with 'Silent' -mode and which one is with 'Über' -mode, so could you guys tell which is which. BIOS files for my 102-C67111-01-AT is 28PA500.SB5 (64kb) and 28PA500.UB5 (121kb). Switch at vga connector side is suppose to be 'Silent' -mode and 'Über' at power connector side.

I use extented programming clip, so I just need to know which BIOS for each.

[Rasz]

its not bios problem, those cards die from hardware working on the physical limit

[Cybrema]

Ok. Here's another one. U300 broken (burned) and Q300 broken (hot out) also. Q300 seems to be 8pin mosfet. Do you guys know what circuit that might be and which parts I should check also? I allready exchanged U300 from sparepart card (Sapphire R9 290X) and tried to exchange that Q300 aswell, but it seems to be broken mosfet also. Had to order couple new ones from China and Im now waiting for those to arrive. It takes couple weeks atleast, so I have good time to test this thing if there's still something else wrong. What are your quess?

[mikkh]

All those are reference cooler cards?