Please read my topic
viewtopic.php?f=48&t=122977Let's discuss it together.
I see you have different board but you could measure some transients by oscilloscope. At least ensure that you have pulses on both memory chokes. Publish images from the scope.
B2 means problem with memory, power to the memory, memory controller power or memory controller itself.
Check by oscilloscope if all phases are working: GPU and both memory phases.
What Power stages are soldered and where? Can you write their symbols on the fresh image?
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I could not start tserver, it immediately
Read carefully my topic
My left memory VRM does not work because probably someone replaced a mosfet to the wrong one.