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ryzen 8gb memory installed, only 4 usable (w10 64bit) bios reads 4gb memory

chexor
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I have B350 msi PC mate mobo, and ram hyperx 8gb fury ddr4 2400mhz cl15 kit hx424c15fbk2/8.

In bios you can see in top right corner it shows 4 gb of memory only. but when i go into memory tab it shows 2 dimms populated (2 free, 4 slots) 2x4gb.

In windows 10/ 64 bit, it shows 8gb installed memory, but only 3.95gb usable.

Is that normal with ryzen?

Yes windows is 64 bit, tried xmp profiles, max memory in msconfig, updated to latest bios, cleared cmos.

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MSi motherboard giving memory problems on Ryzen? Why am I not surprised :P

 

 

Personal Desktop":

CPU: Intel Core i7 10700K @5ghz |~| Cooling: bq! Dark Rock Pro 4 |~| MOBO: Gigabyte Z490UD ATX|~| RAM: 16gb DDR4 3333mhzCL16 G.Skill Trident Z |~| GPU: RX 6900XT Sapphire Nitro+ |~| PSU: Corsair TX650M 80Plus Gold |~| Boot:  SSD WD Green M.2 2280 240GB |~| Storage: 1x3TB HDD 7200rpm Seagate Barracuda + SanDisk Ultra 3D 1TB |~| Case: Fractal Design Meshify C Mini |~| Display: Toshiba UL7A 4K/60hz |~| OS: Windows 10 Pro.

Luna, the temporary Desktop:

CPU: AMD R9 7950XT  |~| Cooling: bq! Dark Rock 4 Pro |~| MOBO: Gigabyte Aorus Master |~| RAM: 32G Kingston HyperX |~| GPU: AMD Radeon RX 7900XTX (Reference) |~| PSU: Corsair HX1000 80+ Platinum |~| Windows Boot Drive: 2x 512GB (1TB total) Plextor SATA SSD (RAID0 volume) |~| Linux Boot Drive: 500GB Kingston A2000 |~| Storage: 4TB WD Black HDD |~| Case: Cooler Master Silencio S600 |~| Display 1 (leftmost): Eizo (unknown model) 1920x1080 IPS @ 60Hz|~| Display 2 (center): BenQ ZOWIE XL2540 1920x1080 TN @ 240Hz |~| Display 3 (rightmost): Wacom Cintiq Pro 24 3840x2160 IPS @ 60Hz 10-bit |~| OS: Windows 10 Pro (games / art) + Linux (distro: NixOS; programming and daily driver)
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Well that memory is on the QVL. 

Have you tried using this bios? It has new Agesa features and should help your SK hynix sticks since other brands other than Samsung seem to have more issues.

https://forum-en.msi.com/index.php?topic=283344.msg1615507#msg1615507

VA.53 is very recent but ever since va.52 the new agesa 1006 is here.

 

check my PC build here: https://valid.x86.fr/jyjc2n

b350 tomhawk arctic h.51 bios, Corsair LPX ram running at 3200mhz

case is a 35$ Zalman Z3 plus white with a cooler master 10$ (15MIR)hyper t4 cooler

20$ EVGA 450w bt (black cables)

150$ 1060 3gb@2.1ghz

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