I thought there were some ristrictions with amount of ram being tested.whats outdated about memtest?
not used it for a bit but worked fine for me last time.
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$
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.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...