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Not all memory usable: (7.92GB usable) of 16GBs.

post #1 of 17
Thread Starter 
Hi guys, after getting a hard drive error possibly from installing a new CPU water cooler, I had to re-install windows (Hard Drive error now resolved).
When Re-installing it I noticed this in the system section: It says I have 8Gbs usable of the 16Gbs in total and I have tried several things to resolve the issue including:
[*Removing the Ram from the DIMM slots, and then reinserting them in different slots]
[*Hitting the MemOK! button on the motherboard with the power off]
[*Changing the speed from 1600MHz to 1333MHz all though I have not tried other frequencies]
[*Changing the speed from 1600MHz to 1333MHz all though I have not tried other frequencies]
Could anyone help me with this problem?

Also, would a Sabertooth 990FX R2.0 Motherboard be able to start up if one DIMM was inserted into one of the B slots as opposed to an A slot, because I've tried and it won't startup when I do that. So I'm wondering whether its the motherboard that is the cause of the problem.
post #2 of 17
Have a look in your BIOS.

Asus motherboards sometimes have a setting that's called something like Hardware Memory Remap, or something along those lines.
Try enabling/disabling it and see if that fixes it.

As for the slots it's best to use the colour that is furthest from the CPU socket.
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Hard DriveHard DriveCoolingOS
Crucial M4 128GB WD 2TB Caviar Green Noctua NH-D14 Windows 7 Home Premium 64-bit 
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post #3 of 17
Not sure if it applies to your situation ,but if you have the water block on down to tight on the cpu all the ram may not be read. This was the case for 1366 intel motherboards
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Case Labs th10
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RX480 rad x2 MCP35x (X2) gentle typhoons 1850 rpm (8) xigamtek fans  
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win pro 64bit samsung 2343 x3 6144x1152 logitech g19 silverstone 1500watt 
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post #4 of 17
Thread Starter 
I'll test out both theories and report back thanks!
post #5 of 17
Looks to be the case half of your ram is showing up, maybe one of the sticks is bad and the other isn't. Do you have a way to test this. Try each stick individually and if one doesn't post then you know. Try all slots.
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MyDigital BPX CoolerMaster Master Liquid 240 windows 10 x64 pro Viewsonic xg2703-gs 
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6700k ASUS ROG STRIX Z270G Nvidia GTX 1060 Corsair Vengeance LPX 16GB DDR4 DRAM 3000MHz 
Hard DriveCoolingOSMonitor
MyDigital BPX CoolerMaster Master Liquid 240 windows 10 x64 pro Viewsonic xg2703-gs 
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post #6 of 17
What OS do you have ? If I remember the win7 home is limited to 8gb so this may be the solution(if you have win7 home).
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MIR[server]
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CPUMotherboardGraphicsGraphics
i7 5820K@4.6Ghz@1.325V 2.05V input Asrock X99 Extreme 4 Sapphire R9 290X [Uber Mode] Nvidia Geforce GT240 GDDR5 512MB [PhysX + analo... 
RAMRAMRAMHard Drive
Crucial Ballistix 2400mhz 4GB 1.3V Crucial 2133@2400mhz 4GB 1.3V Crucial 2133@2400mhz 4GB 1.3V Seagate 4TB 
Hard DriveHard DriveHard DriveCooling
Samsung 840 EVO 120GB[OS] WD Red 1TB Samsung 840EVO 120GB[Arma 3] Koolance 380A [modded for LGA2011v3] 
CoolingCoolingCoolingCooling
Black Water Ultimate 123 [3x Corsair AF120 Perf... MCP655 with Alphacool HF acetal top [5th gear] Feser 10/13 UV Tubing Alphacool CKC clear 
CoolingCoolingCoolingOS
Cooltek 120mm rad [antec tri-speed] Cooltek 120mm Rad [Corsair SP120 High Performan... Alphacool GPX-A 290 [290X waterblock] Windows 7 Ulitimate 64 bit  
MonitorMonitorMonitorMonitor
LG 29EA93 [2560x1080] LG L1715S [1280x1024] Samsung SMB2030N [1600x900] DIY display on V59 controller[1366x768@1440x900] 
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Athlon II X2 250 @2GHZ @1core Gigabyte 870A-USB3 Ati X600 128MB GoodRam 4gb 1333mhz 
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GROM II [Gaming]
(34 items)
 
 
MIR[server]
(16 items)
 
CPUMotherboardGraphicsGraphics
i7 5820K@4.6Ghz@1.325V 2.05V input Asrock X99 Extreme 4 Sapphire R9 290X [Uber Mode] Nvidia Geforce GT240 GDDR5 512MB [PhysX + analo... 
RAMRAMRAMHard Drive
Crucial Ballistix 2400mhz 4GB 1.3V Crucial 2133@2400mhz 4GB 1.3V Crucial 2133@2400mhz 4GB 1.3V Seagate 4TB 
Hard DriveHard DriveHard DriveCooling
Samsung 840 EVO 120GB[OS] WD Red 1TB Samsung 840EVO 120GB[Arma 3] Koolance 380A [modded for LGA2011v3] 
CoolingCoolingCoolingCooling
Black Water Ultimate 123 [3x Corsair AF120 Perf... MCP655 with Alphacool HF acetal top [5th gear] Feser 10/13 UV Tubing Alphacool CKC clear 
CoolingCoolingCoolingOS
Cooltek 120mm rad [antec tri-speed] Cooltek 120mm Rad [Corsair SP120 High Performan... Alphacool GPX-A 290 [290X waterblock] Windows 7 Ulitimate 64 bit  
MonitorMonitorMonitorMonitor
LG 29EA93 [2560x1080] LG L1715S [1280x1024] Samsung SMB2030N [1600x900] DIY display on V59 controller[1366x768@1440x900] 
KeyboardPowerCaseMouse
4Tech X7 G800 Cooler Master Real Power 850w Cooler Master Haf 932 Amd Edition Microsoft Mobile Mouse 4000 
AudioAudioAudioOther
Superlux hd681 FiiO E07K SoundMax Superbeam [bundled with P5B DLX] Scythe Kaze Master Pro 6 chanell 
OtherOther
2x Sharkoon 30cm red cold cathodes 2x Revoltec 10cm UV cold cathodes 
CPUMotherboardGraphicsRAM
Athlon II X2 250 @2GHZ @1core Gigabyte 870A-USB3 Ati X600 128MB GoodRam 4gb 1333mhz 
Hard DriveHard DriveHard DriveHard Drive
Hitachi Ultrastar 1TB Samsung 40gb[OS] 6x Hitachi 2TB (RAID 6) 2x160GB RAID 1 
OSPowerOtherOther
Debian 8.2.0 x64 Pentagram Silent Force 460W Ever Eco Pro 700 CDS [UPS] Edimax EW-7318USg [Access Point] 
CPUCPUMotherboardGraphics
Xeon E5420 Xeon E5420 HP ML350 G5 motherboard HD5450 with HD5770 cooler on passive [PCIE X4] 
RAMHard DriveHard DriveHard Drive
20GB FB-DIMM@800mhz 2x40GB WD RAID0 Sata [11year old as for 2015] 2x73GB HP 15K RPM RAID0 SAS HP 10K RPM 143GB SAS 
Hard DriveHard DriveMonitorPower
HP 10K RPM 143GB SAS HP 10K RPM 143GB SAS Fujitsu W19-1 [1440x900] Delta DPS 800W 
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HP ML350 G5 case Adaptec SATA II RAID 1220SA ADAPTEC SCSI-CARD 29320LP Quantum TC-L32BX LTO 3 [tape drive] 
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post #7 of 17
That just isn't true what so ever. Now 32 bit OSes are limited to 4GB, but a 64 bit OS can handle up to I believe 32 GB, that I will have to look up but I know for a fact its not 8 GB.
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6700k ASUS ROG STRIX Z270G Nvidia GTX 1060 Corsair Vengeance LPX 16GB DDR4 DRAM 3000MHz 
Hard DriveCoolingOSMonitor
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Test Bench
(13 items)
 
  
CPUMotherboardGraphicsRAM
6700k ASUS ROG STRIX Z270G Nvidia GTX 1060 Corsair Vengeance LPX 16GB DDR4 DRAM 3000MHz 
Hard DriveCoolingOSMonitor
MyDigital BPX CoolerMaster Master Liquid 240 windows 10 x64 pro Viewsonic xg2703-gs 
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Logiech G413 Corsair rm650x Test Bench Logitech G403 
Audio
Logitech G533 
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post #8 of 17
Quote:
Originally Posted by Zacotack96 View Post

Hi guys, after getting a hard drive error possibly from installing a new CPU water cooler, I had to re-install windows (Hard Drive error now resolved).
When Re-installing it I noticed this in the system section: It says I have 8Gbs usable of the 16Gbs in total and I have tried several things to resolve the issue including:

What version of Windows did you install? For example, the following two OS only support 8GB maximum, regardless of being x64:

Windows 7 Home Basic
Windows Vista Home Basic

The limit is artificially imposed by Microsoft to get you to buy the Home Premium (16GB) or Professional/Ultimate versions (192GB).
Quote:
I believe 32 GB, that I will have to look up but I know for a fact its not 8 GB.

Sorry, Home Basic versions are definitely "limited" to 8GB on purpose for retail reasons. Not for technical reasons.

Greg
post #9 of 17
Quote:
Originally Posted by Jedson3614 View Post

That just isn't true what so ever. Now 32 bit OSes are limited to 4GB, but a 64 bit OS can handle up to I believe 32 GB, that I will have to look up but I know for a fact its not 8 GB.

http://social.technet.microsoft.com/Forums/windows/en-US/5a518386-27a8-46fa-a85a-678b7c25358e/physical-memory-limits-windows-7
post #10 of 17
Physical Memory Limits: Windows 7

The following table specifies the limits on physical memory for Windows 7.
Version Limit on X86 Limit on X64
Windows 7 Ultimate
4 GB
192 GB
Windows 7 Enterprise
4 GB
192 GB
Windows 7 Professional
4 GB
192 GB
Windows 7 Home Premium
4 GB
16 GB
Windows 7 Home Basic
4 GB
8 GB
Windows 7 Starter
2 GB
N/A
Test Bench
(13 items)
 
  
CPUMotherboardGraphicsRAM
6700k ASUS ROG STRIX Z270G Nvidia GTX 1060 Corsair Vengeance LPX 16GB DDR4 DRAM 3000MHz 
Hard DriveCoolingOSMonitor
MyDigital BPX CoolerMaster Master Liquid 240 windows 10 x64 pro Viewsonic xg2703-gs 
KeyboardPowerCaseMouse
Logiech G413 Corsair rm650x Test Bench Logitech G403 
Audio
Logitech G533 
  hide details  
Reply
Test Bench
(13 items)
 
  
CPUMotherboardGraphicsRAM
6700k ASUS ROG STRIX Z270G Nvidia GTX 1060 Corsair Vengeance LPX 16GB DDR4 DRAM 3000MHz 
Hard DriveCoolingOSMonitor
MyDigital BPX CoolerMaster Master Liquid 240 windows 10 x64 pro Viewsonic xg2703-gs 
KeyboardPowerCaseMouse
Logiech G413 Corsair rm650x Test Bench Logitech G403 
Audio
Logitech G533 
  hide details  
Reply
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