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A couple of years ago I had a problem similar to yours with my previous computer. For example, if DIMM A was in slot A and DIMM B was in slot B the computer didn't recognize that B DIMM, it would say that I only had 2GB, but if I reverse order, DIMM A to slot B and DIMM B to slot A that second DIMM would be recognized and I would have the 4GB that I was suppose to have. Why that happened I have no idea but it completely drained my energy trying to understand what was happening.
The same with Sierra. How could I accept that I had a memory problem when Multicharts and Investor RT are able to load more than 20 charts at the same time and the computer runs as usual and every time I would load charts using Sierra my computer crashed. For me this was obvious a Sierra problem.
If I become half a percent smarter each year, I'll be a genius by the time I die
Can you help answer these questions from other members on NexusFi?
... and what I was afraid of is turning to true, I'm testing the fourth DIMM now and none of the tests crashed the computer so far.
The test ran for one and a half hour for each DIMM.
Next stage will be testing 2 DIMM's together.
If I become half a percent smarter each year, I'll be a genius by the time I die
Prime95 didn't find any error testing each 2GB DIMM's. Opened Sierra using each DIMM, open3d 4 chartbooks at the same time, 20 charts, not once it crashed. Started to connect the DIMM's together, one by one, always testing Sierra, opening those 4 chartbooks, not once the computer crashed.
Now I'm testing again using Prime95, all 4 DIMM's connected, so far didn't crash.
What can a guy do in such situation? Seriously, what can we think in such situation?
If I become half a percent smarter each year, I'll be a genius by the time I die
It could have been a loose connection on one of the DIMMs, or just the ordering change somehow solved the issue.
I would definitely let the custom prime95 test run overnight with 4 DIMMs. Change the time from 15 minutes down to 5 minutes, so that it can complete a cycle in about 6 hours instead of 24.
But hey, problem solved! Now welcome back to using Sierra!
Deselect the maximum memory option if it is selected.
Also, you can optionally select the number of processors to increase the boot speed.
Click on apply to apply the new settings.
Reboot the computer. Once the computer is rebooted, right click on "Computer" on your desktop and select properties. Installed memory should now show just the memory installed rather than the 2 components (installed and usable).
All DIMMs are the same model and make, GSKILL PC-3 10666 4GB ECO CL7 DDR3. The only different between them is the fact that initially when I assembled the computer I only had 4GB (2 DIMMs). I bought the other two 6 months later.
Never noticed that when Sierra is loading the charts it makes my CPU go to 100%. Multicharts and IRT rarely move my CPU above 50% when loading them.
If I become half a percent smarter each year, I'll be a genius by the time I die