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

OS6-OSX

macrumors 6502a
Jun 13, 2004
893
661
California
Goto Apple>About This Mac>System Report>Memory and see status.

Screen Shot 2019-09-22 at 2.02.52 PM.png

- - Post merged: - -

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

Screen Shot 2019-09-22 at 2.02.52 PM.png
 
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Reactions: toke lahti

orph

macrumors 68000
Dec 12, 2005
1,876
391
UK
whats outdated about memtest?

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

Macschrauber

macrumors 6502a
Dec 27, 2015
560
243
Germany
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

macrumors 68020
Original poster
Apr 23, 2007
2,376
341
Helsinki, Finland
whats outdated about memtest?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...
 

orph

macrumors 68000
Dec 12, 2005
1,876
391
UK
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.

 

Macschrauber

macrumors 6502a
Dec 27, 2015
560
243
Germany
Which memtest are you using?
"memtest OS X"? What version?
Code:
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

macrumors G3
Jul 11, 2009
8,479
2,680
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.