Recon RY2 bundle - only one stick of RAM showing

Tim Hutchinson · 30 Mar 2018 at 21:03

Hi All,
I bought the Recon RY2 bundle (Asus Prime B350-plus mobo, Ryzen 5 CPU, 8GB Ram as two 4GB sticks). Fresh install of W10 and all seemed ok BUT I have just noticed that I am only running on half the RAM

The Bios shows there is a 4GB stick in slot A2, and a 4GB stick in B2 - but shows a total of 4GB. Windows System Properties shows 8GB total but only 4GB usable.

I have tried swapping the sticks over but no difference. If I just use one stick in slot A2 (ie only use one stick) - Bios shows 4GB in A2 - 4GB total

Have reset BIOS back to defaults but no difference

Is there a setting I need to change in the BIOS to use both sticks?
Could someone send me a copy of the OCUK profile for this mobo as I have managed to overwrite this profile?
Many thanks
Tim

mistersprinkles · 3 Apr 2018 at 20:26

What does CPU-Z say? (download it)
Also is there any chance you accidentally installed W10 32bit? It sounds like you did.

Is the bios seeing both sticks of RAM?

It sounds like Windows sees both sticks but can only use 4GB which suggests you are running a 32 bit OS.

Tim Hutchinson · 3 Apr 2018 at 21:12

Have shared a couple of photos on photobox. One is a photo of the BIOS screen - shows 4GB each in slots A2 and B2 - the second is the Windows System Properties screen shot showing it is definitely W10 PRO
http://www.photobox.co.uk/album/5296735976
It can see 8GB but can only use 3.94GB

The CPU-Z text dump was massive and mostly irrelevant (to my untrained eye) so here is what I think is the relevant info - let me know if you want specific details:

Chipset
-------------------------------------------------------------------------

Northbridge AMD Ryzen SOC rev. 00
Southbridge AMD B350 rev. 51
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
Memory Type DDR4
Memory Size 8 GBytes
Channels Dual
Memory Frequency 1064.1 MHz (3:32)
CAS# latency (CL) 15.0
RAS# to CAS# delay (tRCD) 15
RAS# Precharge (tRP) 15
Cycle Time (tRAS) 36
Bank Cycle Time (tRC) 51
Command Rate (CR) 2T
Uncore Frequency 1064.1 MHz

Memory SPD
-------------------------------------------------------------------------

DIMM # 1
SMBus address 0x52
Memory type DDR4
Module format UDIMM
Manufacturer (ID) Team Group Inc. (7F7F7F7FEF000000000000)
Size 4096 MBytes
Max bandwidth DDR4-2132 (1066 MHz)
Part number TEAMGROUP-UD4-2400
Serial number 010499DA
Manufacturing date Week 02/Year 18
Nominal Voltage 1.20 Volts
EPP no
XMP yes
XMP revision 2.0
AMP no

DIMM # 2
SMBus address 0x53
Memory type DDR4
Module format UDIMM
Manufacturer (ID) Team Group Inc. (7F7F7F7FEF000000000000)
Size 4096 MBytes
Max bandwidth DDR4-2132 (1066 MHz)
Part number TEAMGROUP-UD4-2400
Serial number 01049A9B
Manufacturing date Week 02/Year 18
Nominal Voltage 1.20 Volts
EPP no
XMP yes
XMP revision 2.0
AMP no

Software
-------------------------------------------------------------------------

Windows Version Microsoft Windows 10 (10.0) Professional 64-bit (Build 16299)
DirectX Version 12.0

InfiniteNoise · 3 Apr 2018 at 22:31

In the BIOS, is there something like Extended Memory Allocation option, or anything else that sounds like it? If it's disabled, try enabling, not sure how relevant it is though, because I had that option on an old mobo and I haven't seen anything like it again on newer boards.

I had an option like that on my old Gigabyte board (back in the days of 1st gen i5/i7), with it disabled, I was limited to a bit below 4GB of RAM no matter how many RAM I have installed.

ExoMale · 4 Apr 2018 at 00:42

either you have 32 bit windows as suggested or you have 4gb allocated to video sharing, could be other reasons, but the first 2 are possible.

mistersprinkles · 4 Apr 2018 at 23:50

ExoMale said:
either you have 32 bit windows as suggested or you have 4gb allocated to video sharing, could be other reasons, but the first 2 are possible.

+1

Tim Hutchinson · 5 Apr 2018 at 09:40

Both CPU-Z and Windows 'System Properties' report the OS as W10 Professional 64 bit so i don't *think* this is the problem
If I go to Task Manager / Performance / Memory it shows 4GB allocated to Hardware so I think ExoMale's idea of the video sharing could be onto something. Does anyone know how to reallocate / unallocate this? At least if I can get to the screen where you set the video sharing I should be able to see what it's set to at present, and if that is the problem.
Don't know my way around W10 enough to dive straight to the right setting, but will start searching.
Many thanks for the pointers