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Only half of RAM is used on AB350 Pro4 |
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datonyb 
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Joined: 11 Apr 2017 Location: London U.K. Status: Offline Points: 3139 |
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 Posted: 03 Sep 2018 at 8:40pm |
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ok so now move onto testing the ram and the slots one at a time one stick in slot a2 check it reads 4gb next stick check that untill all four sticks have been checked in slot a2 if all 4 sticks are ok next test one stick in slot a1 then b1 then b2 see what happens
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 [/url]3800X, powercolor reddevil vega64, gskill tridentz3866, taichix370, evga750watt gold |
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AsiliS
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Joined: 03 Sep 2018 Location: France Status: Offline Points: 11 |
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Posted: 03 Sep 2018 at 8:37pm |
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Done, I checked the CPU. The problem doesn't seem to be that :/ I also tested with two of 8 GB. Again, the problem was the same, only 8 usable
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datonyb
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Posted: 03 Sep 2018 at 7:28pm |
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ok carefully remove the cpu visually check for slightly bent pins (or maybe some excess thermal paste on pins) and then reseat the cpu into socket p.s. if the bios was detecting them properly, it wouldnt be saying 'single channel' it would say double channel
Edited by datonyb - 03 Sep 2018 at 7:30pm |
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AsiliS
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Posted: 03 Sep 2018 at 7:50am |
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Indeed, the bios displays 'single channel' ! Yet I checked and still checked, the RAMs are properly installed. The BIOS detects them very well too. I searched a little on the web. Apparently, it's related to Memory Remapping but I did't understand everything. There is my configuration : CPU : AMD Ryzen 5 2600X GPU: GeForce GTX 1060 RAM : DDR4 HyperX Fury, 4 x 4 Gb (Sorry for the mistakes, I don't speak English very well) Thanks you.
Edited by AsiliS - 03 Sep 2018 at 7:53am |
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datonyb
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Posted: 03 Sep 2018 at 7:25am |
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most probable is the ram sticks are not properly inserted into the slots (this has been quite common on ryzen boards) second place to look is the actual cpu seating, this also has been a problem worst case is slightly bent pins. usual case (if it is the cpu seating is a remove-refit makes the contact clean) TRY THE RAM FIRST ! another clue might be the bios says 'single channel' this would point more likely to bad insertation of the ram sticks
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AsiliS
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Posted: 03 Sep 2018 at 6:06am |
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Hello,
I
can't use my whole RAM capacity ! I have a 16GB kit (4x8GB) and only
8GB usable in windows 10 and the other 8GB is "Hardware Reserved". In bios the 4 DIMMs was detected properly with the correct capacity.
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