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B550m Mortar Wifi ram slot 3&4 not working

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Old 01-07-2020, 07:50 AM   #1
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B550m Mortar Wifi ram slot 3&4 not working

I have a 5days old B550 mortar.
Yesterday after getting both NVMe SSD and mechanical drive from Amazon, I added them in 1 by 1. SSD first with fresh install of windows. Ram was working fine. After that I shut down and added in the HDD and do some cable management at the back of my case.
Switch it back on and my rgb Rams light up but monitor won't turn on. Did some troubleshoot and found that ram slot 3 and 4 are not working.

Any idea what could cause it and any ready method to fix it? Take note I was moving my case between the floor and my table so psu is unplugged when I was working on it.
Processor
AMD Ryzen 5 3600
Mainboard
MSI MAG B550M MORTAR WIFI
Graphics Card
Sapphire Radeon RX 5700 XT 8 GB PULSE
Memory
G.Skill Trident Z Neo 16 GB DR4-3600 CL16
Storage
Western Digital SN750 1 TB
Casing
Lian Li PC-O11 Dynamic (White)
PSU
Corsair RM 750 W 80+ Gold

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Old 01-07-2020, 08:35 AM   #2
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All 4 slots populated ?
Test 1 stick at a time first, then the slots.
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Asus TUF B450M-PLUS
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Acer Nitro VG271U
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Thermaltake Core V21
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Old 01-07-2020, 08:38 AM   #3
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If you are only using a pair of RAM sticks and you have 4 slots you should be mounting them in the even or odd slots.

Usually slots 2 & 4 are preferred as they are a little further away from the CPU.
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64GB (16GB x 4) G.Skill Trident Z Neo RGB 3600Mhz CL16
Display
Dell Ultrasharp 32” 4K U3219Q
Storage
Aorus NVMe Gen 4 SSD 1TB
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Lian Li PC-011 Dynamic Razer edition
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Old 01-07-2020, 10:24 AM   #4
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Using 2x8gb stick. The 2 slot closest to CPU is not working. Are those 3 and 4 or 1 and 2?

I tested the ram stick 1 by 1 followed by ram slot 1 by 1. Conclusion is my rams are fine, the 2 slot closest to CPU is not working.

Originally I was using it on the 2nd slot and 4th slot away from CPU as indicated on the motherboard manual
Processor
AMD Ryzen 5 3600
Mainboard
MSI MAG B550M MORTAR WIFI
Graphics Card
Sapphire Radeon RX 5700 XT 8 GB PULSE
Memory
G.Skill Trident Z Neo 16 GB DR4-3600 CL16
Storage
Western Digital SN750 1 TB
Casing
Lian Li PC-O11 Dynamic (White)
PSU
Corsair RM 750 W 80+ Gold

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Old 01-07-2020, 10:29 AM   #5
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If your MB has color pairs follow the colours.
Different MB maker arrange their DIMM slots in different ways, so it's best to check your motherboard manual to see what it recommends.
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AMD Ryzen 3900X & Intel i9 9900K, Macbook Pro 15", Lenovo Legion Y540
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X570 Aorus I WIFI PRO & Z390 Phantom ITX
Graphics Card
Aorus RX5700 & GeForce RTX 2080 Ti
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Corsair Vengance RGB Pro 32GB && 16GB
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LG 4K 32"
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Samsung 970 Evo+ 1TB && Seagate Firecuda320 1TB
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Ghost S1 Black && Streacom DA2 Silver
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FSP Dagger && Corsair
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Old 01-07-2020, 10:33 AM   #6
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Try one piece on slot 2. If slot 2 is not working for single stick, you can bring your mobo down to the distro to let them have a look.

By right, single memory should work on slot 2.

Closest to cpu is slot 1. Furthest away is slot 4.
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Old 01-07-2020, 10:58 AM   #7
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Using 2x8gb stick. The 2 slot closest to CPU is not working. Are those 3 and 4 or 1 and 2?

I tested the ram stick 1 by 1 followed by ram slot 1 by 1. Conclusion is my rams are fine, the 2 slot closest to CPU is not working.

Originally I was using it on the 2nd slot and 4th slot away from CPU as indicated on the motherboard manual
The RAM slots are counted from the one closest to the CPU. So closest is 1 going outwards. I would plug in the sticks into slot 2 and 4 and retest.

Also go into the bios and consider resetting all settings to default in case anything has changed in the RAM settings causing you problems. Test using default settings first. Next I would enable XMP as that should set the recommended settings for your RAM.

When you get a chance update your profile with your PC specs so its easier to help rather than having to scroll down to the original thread.

Last edited by hafiz116; 01-07-2020 at 11:02 AM..
Processor
AMD Ryzen 9 3950X - Aorus Liquid Cooler 360
Mainboard
Gigabyte x570 Aorus Xtreme
Graphics Card
Gigabyte RTX 2080 Ti Aorus Xtreme 11Gb OC
Memory
64GB (16GB x 4) G.Skill Trident Z Neo RGB 3600Mhz CL16
Display
Dell Ultrasharp 32” 4K U3219Q
Storage
Aorus NVMe Gen 4 SSD 1TB
Casing
Lian Li PC-011 Dynamic Razer edition
PSU
Corsair AX850
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Old 01-07-2020, 11:28 AM   #8
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Thanks for all the inputs.

So in conclusion, my ram slot 1 and 2 are not working(Title wrong). I was on slot 2 and 4 with xmp enabled for 5days before I get this error.
I have tried a single stick of ram on each slot. Only slot 3 and 4 works. Changed to my other stick and it shows the same result. I disabled xmp profile and rested bios setting to retried on slot 1 and 2 but still failed.

Guess I have to take a trip to RMA.
Processor
AMD Ryzen 5 3600
Mainboard
MSI MAG B550M MORTAR WIFI
Graphics Card
Sapphire Radeon RX 5700 XT 8 GB PULSE
Memory
G.Skill Trident Z Neo 16 GB DR4-3600 CL16
Storage
Western Digital SN750 1 TB
Casing
Lian Li PC-O11 Dynamic (White)
PSU
Corsair RM 750 W 80+ Gold

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Old 01-07-2020, 11:44 AM   #9
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Dude, u gotta read the manual. Slot 1 and 3 only works if slot 2 and 4 are populated.

Last edited by Mythmaker; 01-07-2020 at 11:47 AM..
Processor
AMD R9 3900X
Mainboard
MSI B550M Mortar
Graphics Card
Zotac GTX1070 Ti Mini 8GB
Memory
2x Kingston HyperX 32GB
Storage
XPG SX8200 2TB Pro........ Samsung 860 QVO 1TB..... 2x WD Elements 10TB
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Old 01-07-2020, 11:45 AM   #10
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Thanks for all the inputs.

So in conclusion, my ram slot 1 and 2 are not working(Title wrong). I was on slot 2 and 4 with xmp enabled for 5days before I get this error.
I have tried a single stick of ram on each slot. Only slot 3 and 4 works. Changed to my other stick and it shows the same result. I disabled xmp profile and rested bios setting to retried on slot 1 and 2 but still failed.

Guess I have to take a trip to RMA.
You have done the required tests so yes now its a RMA session,...
Processor
AMD Ryzen 9 3950X - Aorus Liquid Cooler 360
Mainboard
Gigabyte x570 Aorus Xtreme
Graphics Card
Gigabyte RTX 2080 Ti Aorus Xtreme 11Gb OC
Memory
64GB (16GB x 4) G.Skill Trident Z Neo RGB 3600Mhz CL16
Display
Dell Ultrasharp 32” 4K U3219Q
Storage
Aorus NVMe Gen 4 SSD 1TB
Casing
Lian Li PC-011 Dynamic Razer edition
PSU
Corsair AX850
Audio
Sennheiser TS 175
OS
Windows 10 Pro x64

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Old 01-07-2020, 12:14 PM   #11
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Dude, u gotta read the manual. Slot 1 and 3 only works if slot 2 and 4 are populated.
He tried every single slots using 1 piece of memory. You gotta read what he posted.
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