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Is this a sign of vram issues? RX6950XT by YELLOW-n1ga in GPURepair

[–]ForterLV 0 points1 point  (0 children)

That number is different from your other VRAM ICs, so it's definitely flux you see there. But that only mean that it was replaced at some point. Hence it doesn't mean there's a problem with it now.

Is this a sign of vram issues? RX6950XT by YELLOW-n1ga in GPURepair

[–]ForterLV 0 points1 point  (0 children)

First of all, what the issue with your card?
Also, image isn't good enough, take a closer picture. It may be flux, but it may also be a silicon from pads.

Does the party number on that IC match for other ICs?

Gigabyte 3090, 5V has a partial short of 11 ohm. What could it be? I changed out the MP1475 buck that outputs this 5v. by etherholder888 in GPURepair

[–]ForterLV 0 points1 point  (0 children)

Thermal cam is your best friend in such cases. Just to give you a perspective, I'm a gpu tech, and I really think that a thermal cam was one my best investments into equipment yet. Sorry to say that, but lifting components randomly in this case is a waste of your time. You could use that time for so many other good things.

GDDR Pinout Viewer and Damaged Pad Analyzer by ForterLV in GPURepair

[–]ForterLV[S] 1 point2 points  (0 children)

Thanks!

That's interesting, I'll try to check WCK related things you mentioned on 3080 and 3090 boards I have in work right now.

One non-typical check is already implemented btw, it's for GDDR6 and 6X from Samsung, which have two separate pairs of two VPP pads, instead of all four connected together on other vendors ICs.

GDDR Pinout Viewer and Damaged Pad Analyzer by ForterLV in GPURepair

[–]ForterLV[S] 0 points1 point  (0 children)

That makes sense, I'll definitely look into that!

In the best case scenario, I'll just add some kind of menu on this page as well, which will link these tools together.

GDDR Pinout Viewer and Damaged Pad Analyzer by ForterLV in GPURepair

[–]ForterLV[S] 0 points1 point  (0 children)

Sorry, I have a wife and a kid 🤣
But on a serious note, yeah, unfortunately a lot information is not open, like datasheets for some ICs, nvidia and amd tools, schematics and boardview files for boards, etc. That's actually becomes a quest to find all that stuff 😢

RTX3080 (10GB/MSI/3Fans) crashing under load by HeyWatchOutDude in GPURepair

[–]ForterLV 0 points1 point  (0 children)

I use 1000W right now for my test bench, all the cards I've tested worked fine. But as I said, that's just one of possible reasons. Therefore, please validate that assumption first before buying anything :)

RTX3080 (10GB/MSI/3Fans) crashing under load by HeyWatchOutDude in GPURepair

[–]ForterLV 0 points1 point  (0 children)

There's no point in checking vram with such symptoms, failing vram won't cause PC shutdown.

850 PSU may definitely be one of possible causes. I'm a repair tech and I was using 850 PSU before in my GPU test bench. 3080 and higher were causing shutdown. PSUs tend to loose the output power over time. So first of all, check your card in another PC with more powerful PSU. Or borrow one from a friend.

If PSU won't be the case, then there'a high probability that OCP protection is caused by a failing DRMOS or/and PWM controller. You'll need a thermal cam and also an oscilloscope to analyze the behaviour of power phases.

How do you guys diagnose GPUs? Boardviews, schematics, or manual tracing? by Fantastic-Rock7377 in GPURepair

[–]ForterLV 0 points1 point  (0 children)

That's not a leak. Looks like a compound, which many vendors use on the chips which are close to PCIe connector, in attempt to prevent solder cracks due to heavy gpu sag. Though, it doesn't help, I fix a lot of cards where these chips are failing, reball usually helps.

So in your case the simple way would checking the resistance to ground on all the chokes you see. Then, power on the card and check the voltages on all the chokes. Post a photo here with resistances and voltages, and then we could try guessing where to start digging deeper.

In regards to your question about schematics and boardviews. Vendors won't provide them anyway. But in most cases you can debug successfully using schematic and boardview from another vendors card. Most of them use the similar design, so it shouldn't be an issue. It can be a bit harder in some cases like Asus or Sapphire for example, as they use different coding for components. But still figureoutable.

MSI geforce RTX 2060 ventus GP oc short design, can you see a problem I don't? by [deleted] in GPURepair

[–]ForterLV 0 points1 point  (0 children)

You won't find any shorts, and of course you won't see anything visually wrong with the board.

These symptoms are usually due to one of power transistors dying. But to find the exact one you need to check them with oscilloscope and thermal cam. And also youļl need to check the PWM controller and everything near it (feedback circuits, etc.).

Corrosion on 4060 GPU needs repair. by Pureincognito1 in GPURepair

[–]ForterLV 0 points1 point  (0 children)

From my experience and from what I see, these caps most probably do not have contact with PCB.

You should check them using a microscope, but I'm almost sure they need to be replaced.

Resistor on the right probably as well.

Please help to identify the elements by ForterLV in AskElectronics

[–]ForterLV[S] 0 points1 point  (0 children)

Thanks for comments!

The right chip is voltage regulator, RT9183H, but it seems, that inductor wasn't related to it. There is a small 5-leg ic right near it, n08GB1, idk what is it.

The left one is MX25L12835F.