Solved Ram my be vulnerable to high frequency row hammer bit flips

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waveform

PCHF Member
Oct 31, 2023
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I added two sticks of the identical spec for spec memory to my system, I've done two Memtest86 v10.6 Free version passes with 0 errors, but there's this message in the notes.
Ram my be vulnerable to high frequency row hammer bit flips

Not getting the error with the original two sticks.

Everything I'm seeing online is saying it's more to do with a security vulnerability and that it's not something to worry about. Someone else said they updated Memtest and it went away, but I'm running the latest atm. Although the original two sticks that were in the system were ver 8.3 - the new sticks I added are ver3.24.
This sounds like an old exploit, but I'm more concerned with the stability of the memory and not getting corrupt data. Again, I'm on my 2nd pass with 0 errors. The Hammer bit error is in the notes section of Memtest.



  • Corsair Vengeance
  • CMZ16GX3M2A1600C10
  • 1600MHz 10-10-10-27
  • 1.5V
  • Running 4 - 8GB sticks
  • Z87-G45 GAMING Motherboard

=====

This makes it sound serious for data corruption

The Hammer Test is designed to detect RAM modules that are susceptible to disturbance errors caused by charge leakage. This phenomenon is characterized in the research paper Flipping Bits in Memory Without Accessing Them: An Experimental Study of DRAM Disturbance Errors by Yoongu Kim et al. According to the research, a significant number of RAM modules manufactured 2010 or newer are affected by this defect. In simple terms, susceptible RAM modules can be subjected to disturbance errors when repeatedly accessing addresses in the same memory bank but different rows in a short period of time. Errors occur when the repeated access causes charge loss in a memory cell, before the cell contents can be refreshed at the next DRAM refresh interval.
 
Being that the OP revisited the forum but chose not to reply this thread will be closed.
 
re-opened.
 
I'm done, sorry, I'm not use to closing posts at other forums. It's resolved.

I never did figure out what was going on, I ordered the same chips the other day, but these were the same 8.22 versions this time as the originals in the system. It made no difference. Still got the hammer flips. I'm just rolling with it.
 
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