MP 1,1-5,1 MP3,1 which RAM dimm is faulty?

[toke lahti]

 

[OS6-OSX]

Goto Apple>About This Mac>System Report>Memory and see status.

[automerge]1569186439[/automerge]
Goto Apple>About This Mac>System Report>Memory and see status.

 

[toke lahti]

Yes,
All ok now, waiting for fault to appear.
My ols ”memtest os x” seems to be pretty outdated...

 

[orph]

whats outdated about memtest?

not used it for a bit but worked fine for me last time.

 

[Macschrauber]

memtest is still fine,

can copy it in /usr/local/bin - even with SIP enabled

and run it in Single User mode to give it max ram to test

 

[toke lahti]

whats outdated about memtest?

not used it for a bit but worked fine for me last time.

I thought there were some ristrictions with amount of ram being tested.
Butat least newest (2010) version of Rember did check all of my 20GB (4x4+4x1) of ram.
And running it in normal macos mode, I could check from System Information, which dimm is faulty.

Now I'm gonna ask Hynix if these dimms have "guarantee for life", Otherwise it might be hard to find matched pair? Or I'll just have to live with 18GB...

 

[toke lahti]

memtest is still fine,

can copy it in /usr/local/bin - even with SIP enabled

and run it in Single User mode to give it max ram to test

Which memtest are you using?
"memtest OS X"? What version?

 

[orph]

i think most the 'ram test' apps are just GUI's for mem test, if you want to get fancy you can make/get a linux boot disc with mem test on

mem test cant scan the ram used by the OS, the linux boot disc version is super striped down so almost no ram is used by the OS.

but for normal people it's not worth doing.

MemTest for Mac OS X Tests your RAM - OS X Daily

If you have recently upgraded your Mac RAM, or if you are experiencing strange system crashes, it’s a good idea to test your memory modules integrity using a free tool called memtest. Essentially, memtest is a utility designed to stress test RAM for errors. Without getting overly technical in...

osxdaily.com

 

[Macschrauber]

Which memtest are you using?
"memtest OS X"? What version?

Mac-Pro:bin Macschrauber$ memtest

Memtest version 4.23 (64-bit)
Copyright (C) 2004 Charles Cazabon
Copyright (C) 2004-2014 Tony Scaminaci (Macintosh port)
Licensed under the GNU General Public License version 2 only

NOTE: No command-line arguments have been specified
Using defaults: Test all available memory, one test pass, no logfile

Mac OS X 10.14.6 (Build 18G87) running in multiuser mode
Memory Page Size is 4096 bytes
System has 8 Intel core(s) with SSE
Total free memory is 5298 MB
Requested test memory is 5298 MB
Allocated test memory is 5298 MB at local address 0x0000000105ea3000
Attempting memory lock... locked successfully
Partitioning memory into 2 comparison buffers...
Buffer A: 2649 MB starts at local address 0x0000000105ea3000
Buffer B: 2649 MB starts at local address 0x00000001ab7ab800

Running 1 test sequence... (CTRL-C to quit)

Test sequence 1 of 1:

Running tests on full 5298 MB region...
  Stuck Address       : testing  1 of 16^C
Mac-Pro:bin Macschrauber$

 

[chrfr]

I thought there were some ristrictions with amount of ram being tested.
Butat least newest (2010) version of Rember did check all of my 20GB (4x4+4x1) of ram.
And running it in normal macos mode, I could check from System Information, which dimm is faulty.

Now I'm gonna ask Hynix if these dimms have "guarantee for life", Otherwise it might be hard to find matched pair? Or I'll just have to live with 18GB...

If you open the Mac while it’s running you should see a red LED on the memory riser cards which will correspond to which DIMM is faulty. (In normal operation there should be no red LEDs lit on the risers.) Often, on these old computers, it’s just a matter of reseating the DIMM that shows as bad.