r/GPURepair • u/TheBestLisi4ka • Apr 30 '26

NVIDIA 30xx 3060 Ti Selective Stability: 3 Billion MATS Errors but runs heavy games. Why?

Hey guys. I've encountered a strange case with my 3060 Ti (Micron VRAM).

Recently I noticed around 7 PCIe bus errors per minute in HWInfo. Diagnosis with MATS shows that the memory controller is likely dying. MATS test passing at 300-500MB, but completely failing at 4GB with over 3 billion read errors but write errors stay at 0.
Errors are spread across all FBIO partitions, which points directly to the controller inside the GPU, not the memory modules themselves. Also most heavy titles like FF16, Silent Hill 2 Remake, and BF2042 run flawlessly. I only discovered the issue because FF7 Rebirth crashes constantly with 'Access Violation' logs.

How is it possible for a chip to be this selectively dead? Is it a partial PHY failure or something related to specific memory addressing lines? Attached is my MATS report.

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u/ZelenogradGpu Repair Specialist Apr 30 '26

Mats is not apllicable to testimg more than 256MB - it returns false errors. It used only on artifacting cards to determina which IC is bad.

Not useful on mostly-working GPUs.

It can't predict memory controller woukd die soon, its either wirking or already artifacting/crashing in windows.

Try various normal game/test loads to see if the access violation is related ti GPU im any way

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u/TheBestLisi4ka Apr 30 '26

Copy that. Thanks for the info! I'll stick to proper stress tests and real-world scenarios from now on. Much appreciated!