Windows 7 64bit shows 3.73GB usable memory with 8GB installed

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[SOLVED] Windows 7 64bit shows 3.73GB usable memory with 8GB installed

I have two sticks of 4gb PNY RAM (8gb total) installed in an Asrock A75M motherboard, which supports 16GB of RAM. I've already flashed my BIOS, thinking that may be it, but it didn't work.

Windows 7 as well as my BIOS show that 8GB of RAM is installed, but only 3.73 is usable. I have an onboard video card, so 256MB is dedicated to that, which makes sense, but why isn't the other 4GB showing up?
 

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My Computer My Computer

At a glance

Windows 7AMD A8-38508GBAMD 6550D APU
OS
Windows 7
CPU
AMD A8-3850
Motherboard
Asrock A75M
Memory
8GB
Graphics Card(s)
AMD 6550D APU
Sound Card
Onboard
Monitor(s) Displays
46" Vizio TV
Screen Resolution
1920x1080
Hard Drives
OCZ Vertex SSD
You need a setting in the BIOS called Memory Remapping.
 

My Computer My Computer

At a glance

Windows 10 Pro (x64)Intel Core i7-3930K (3.2GHz - 4.5GHz)4x Samsung 4GB PC3-12800 DDR3 (16GB 1600MHz)Nvidia Geforce GTX 690
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Alienware Aurora ALX R4
OS
Windows 10 Pro (x64)
CPU
Intel Core i7-3930K (3.2GHz - 4.5GHz)
Motherboard
Alienware Aurora-R4 x79
Memory
4x Samsung 4GB PC3-12800 DDR3 (16GB 1600MHz)
Graphics Card(s)
Nvidia Geforce GTX 690
Sound Card
SteelSeries Siberia Elite
Monitor(s) Displays
Dell UltraSharp U3011
Screen Resolution
2560x1600
Hard Drives
Samsung 850 Pro 256 GB, Seagate 1TB Desktop Hybrid HDD, 2x Western Digital 4TB Green HDD
PSU
875W Some Dell PSU <.<
Case
Alienware Aurora ALX
Cooling
Custom Liquid Cooling (EK CPU & GPU blocks) dual EK 480RAD
Keyboard
Logitech G710+ Mechanical
Mouse
Logitech G700s
Internet Speed
Verizon Fios (50 mbps average)
Other Info
Server: Intel NUC D54250WYK: i5-4250U, 16GB, 256 GB mSATA, Windows Server 2012 R2
logicearth said:
You need a setting in the BIOS called Memory Remapping.
Click to expand...

There's no such setting in my BIOS.

The BIOS does report 8gb as well as Windows does, so wouldn't it be a Windows issue?
 

My Computer My Computer

At a glance

Windows 7AMD A8-38508GBAMD 6550D APU
OS
Windows 7
CPU
AMD A8-3850
Motherboard
Asrock A75M
Memory
8GB
Graphics Card(s)
AMD 6550D APU
Sound Card
Onboard
Monitor(s) Displays
46" Vizio TV
Screen Resolution
1920x1080
Hard Drives
OCZ Vertex SSD

My Computer My Computer

At a glance

Windows 7 Ultimate 64 bitAMD Phenom II X4 965 Black EditionGSkill 4 X 2 GB PC 8500XFX Radeon HD 6790 D
Computer Manufacturer/Model Number
Custom built
OS
Windows 7 Ultimate 64 bit
CPU
AMD Phenom II X4 965 Black Edition
Motherboard
Gigabyte GA-MA790X-DS4
Memory
GSkill 4 X 2 GB PC 8500
Graphics Card(s)
XFX Radeon HD 6790 D
Sound Card
On board RealTek HD
Monitor(s) Displays
Dual monitors:Samsung SyncMaster S20B300
Screen Resolution
1600 X 900
Hard Drives
Seagate Barracuda 1TB (primary)
Seagate Barracuda 2 X 320 GB
PSU
Ultra X4 750 watt fully modular
Case
Thermaltake Overseer RX 1 full tower
Cooling
Core-Contact 92 mm CPU Cooler
Keyboard
Logitech G510
Mouse
Razor DeathAdder
Internet Speed
50/5 Mbps UL/DL
Other Info
Optical: Super Muliti DVD burner w/lightscribe, Hauppauge WinTV HVR-1800

My Computer My Computer

At a glance

Windows 7AMD A8-38508GBAMD 6550D APU
OS
Windows 7
CPU
AMD A8-3850
Motherboard
Asrock A75M
Memory
8GB
Graphics Card(s)
AMD 6550D APU
Sound Card
Onboard
Monitor(s) Displays
46" Vizio TV
Screen Resolution
1920x1080
Hard Drives
OCZ Vertex SSD
If you run resmon and look at the memory tab, is the missing memory "Hardware Reserved"?
 

My Computer My Computer

At a glance

Windows 10 Pro x64Intel Core i7 4790K @ 4.5GHz32GB DDR3Nvidia GeForce GTX970
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom
OS
Windows 10 Pro x64
CPU
Intel Core i7 4790K @ 4.5GHz
Motherboard
Asus Maximus Hero VII
Memory
32GB DDR3
Graphics Card(s)
Nvidia GeForce GTX970
Sound Card
Realtek HD Audio
Screen Resolution
1920x1200
Hard Drives
1x Samsung 250GB SSD
4x WD RE 2TB (RAIDZ)
PSU
Corsair AX760i
Case
Fractal Design Define R4
Cooling
Noctua NH-D15
cluberti said:
If you run resmon and look at the memory tab, is the missing memory "Hardware Reserved"?
Click to expand...
4375 MB shows up as "Hardware reserved".
 

My Computer My Computer

At a glance

Windows 7AMD A8-38508GBAMD 6550D APU
OS
Windows 7
CPU
AMD A8-3850
Motherboard
Asrock A75M
Memory
8GB
Graphics Card(s)
AMD 6550D APU
Sound Card
Onboard
Monitor(s) Displays
46" Vizio TV
Screen Resolution
1920x1080
Hard Drives
OCZ Vertex SSD
Thus you need Memory Remapping in the BIOS.
 

My Computer My Computer

At a glance

Windows 10 Pro (x64)Intel Core i7-3930K (3.2GHz - 4.5GHz)4x Samsung 4GB PC3-12800 DDR3 (16GB 1600MHz)Nvidia Geforce GTX 690
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Alienware Aurora ALX R4
OS
Windows 10 Pro (x64)
CPU
Intel Core i7-3930K (3.2GHz - 4.5GHz)
Motherboard
Alienware Aurora-R4 x79
Memory
4x Samsung 4GB PC3-12800 DDR3 (16GB 1600MHz)
Graphics Card(s)
Nvidia Geforce GTX 690
Sound Card
SteelSeries Siberia Elite
Monitor(s) Displays
Dell UltraSharp U3011
Screen Resolution
2560x1600
Hard Drives
Samsung 850 Pro 256 GB, Seagate 1TB Desktop Hybrid HDD, 2x Western Digital 4TB Green HDD
PSU
875W Some Dell PSU <.<
Case
Alienware Aurora ALX
Cooling
Custom Liquid Cooling (EK CPU & GPU blocks) dual EK 480RAD
Keyboard
Logitech G710+ Mechanical
Mouse
Logitech G700s
Internet Speed
Verizon Fios (50 mbps average)
Other Info
Server: Intel NUC D54250WYK: i5-4250U, 16GB, 256 GB mSATA, Windows Server 2012 R2

My Computer My Computer

At a glance

Windows 10 Pro X64Intel Quad Core i7-4770 @ 3.4Ghz16.0GB PC3-12800 DDR3 SDRAM 1600 MHzIntel Integrated HD Graphics
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Lenovo IdeaCenter 450
OS
Windows 10 Pro X64
CPU
Intel Quad Core i7-4770 @ 3.4Ghz
Memory
16.0GB PC3-12800 DDR3 SDRAM 1600 MHz
Graphics Card(s)
Intel Integrated HD Graphics
Sound Card
Realtek HD Audio
Monitor(s) Displays
HP 22" LCD
Screen Resolution
1680 x 1050
Hard Drives
250GB Samsung EVO SATA-3 SSD
2TB Seagate ST2000DM001 SATA-2
1.5TB Seagate ST3150041AS SATA
Keyboard
Dell USB
Mouse
Lenovo USB
Internet Speed
Cable via Road Runner 3MB Upload, 30MB Download
Antivirus
Windows Defender, MBAM Pro, MBAE
Browser
Seamonkey
Other Info
UEFI/GPT
PLDS DVD-RW DH16AERSH
I had the same problem, with the same board. Make sure your ram sticks are installed in the correct slots. If you have only 2 sticks, make sure they are both in BLUE or WHITE, not BLUE AND WHITE. I had 4 GB installed in 1 BLUE and 4GB installed 1 WHITE and it gave me the same memory readings. When I switched them to both BLUE slots, I got the full 8GB minus what I have in reserve for the video card.
 
Last edited:

My Computer My Computer

At a glance

Slackware64 13.37AMD A8-3870Mushkin Silverline 8GB 1333Radeon 6550D
Computer Manufacturer/Model Number
Custom
OS
Slackware64 13.37
CPU
AMD A8-3870
Motherboard
Asrock A75 Extreme6 FM1
Memory
Mushkin Silverline 8GB 1333
Graphics Card(s)
Radeon 6550D
Sound Card
Realtek HD Audio
Monitor(s) Displays
Viewsonic P220F
Screen Resolution
1600x1200
Hard Drives
Western Digital SATA 160GB
Western Digital SATA II 1.5TB
Seagate IDE 300GB
PSU
Antec Earthwatts 650
Case
Antec Eleven Hundred
Mouse
Kensington Trackball
Internet Speed
Charter Ultra100
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I was able to get it fixed by switching the RAM around a couple of times (first time didn't work, second time did), so maybe they just weren't seated properly the first 2 times.

Thanks everyone for the responses.
 

My Computer My Computer

At a glance

Windows 7AMD A8-38508GBAMD 6550D APU
OS
Windows 7
CPU
AMD A8-3850
Motherboard
Asrock A75M
Memory
8GB
Graphics Card(s)
AMD 6550D APU
Sound Card
Onboard
Monitor(s) Displays
46" Vizio TV
Screen Resolution
1920x1080
Hard Drives
OCZ Vertex SSD
I had this problem....I have 7 gig and it was only seeing 5! before I noticed this I had messed about with MSCONIG into the boot tab, advanced options and unticked the box maximum memory and that worked for me.....
 

My Computer My Computer

At a glance

windows 7 home premium x64AMD Athlon 64 x2 5200+7.00GBNVIDIA GeForce 9600GT
OS
windows 7 home premium x64
CPU
AMD Athlon 64 x2 5200+
Motherboard
M2N-SLI DELUXE
Memory
7.00GB
Graphics Card(s)
NVIDIA GeForce 9600GT
Sound Card
High Definition Audio Device
Monitor(s) Displays
Q19wb
Screen Resolution
1400 x 900
Hard Drives
ST325082 0AS SCSI 232.88 GB
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