Overclock.net › Forums › Components › Memory › 16gb shows up as 15.6gb
New Posts  All Forums:Forum Nav:

16gb shows up as 15.6gb

post #1 of 4
Thread Starter 
Running 4 unmatched sticks of 4gb ddr3 1600mhz Samsung ram and it shows up as 15.6gb rather than the full 16. I'm running 64 bit versions of Windows 8 and Windows 7 and both of them show the same thing.

Any thoughts?
post #2 of 4
Disable any onboard video RAM via BIOS. Also, you can cross reference detailed stats via CPUz. Try rearranging sticks and applying voltages of the highest mixed ram.
 
Alienware 13
(10 items)
 
Alienware Alpha
(6 items)
 
CPUMotherboardGraphicsRAM
Intel i7 4770k @4.0Ghz MSI Z87 G65 EVGA 980Ti Classified+EVGA 660SC PhysX G.Skill Trident X 16GB @2400Mhz 
Hard DriveCoolingOSMonitor
Corsair 480GB+1TB WD Black Corsair H100 W10 Pro|Start10 U2713HM+U22 LED+ACz1 Mount 
KeyboardPowerCaseMouse
RealForce 87U 55g  Corsair HX1050 Corsair 650D Razer DeathAdder+Firefly 
Audio
STX+SP2500, Asgard 2+HD650 
CPUGraphicsRAMHard Drive
Intel i7 6500U nVidia GTX 960m OC Samsung 16GB 1.35v M.2 850 EVO 500GB+1TB WD 
OSMonitorKeyboard
W10|Start 10 IPS 4k, Touch Alienware FX 
CPUGraphicsRAMHard Drive
Intel i7 4785T @3.2Ghz 8MB nVidia 860m OC vBIOS mod HyperX Impact 16GB DDR3 256GB Samsung SSD+1TB HDD 
OSAudio
W10|Start 10 DragonFly v1.2 
  hide details  
Reply
 
Alienware 13
(10 items)
 
Alienware Alpha
(6 items)
 
CPUMotherboardGraphicsRAM
Intel i7 4770k @4.0Ghz MSI Z87 G65 EVGA 980Ti Classified+EVGA 660SC PhysX G.Skill Trident X 16GB @2400Mhz 
Hard DriveCoolingOSMonitor
Corsair 480GB+1TB WD Black Corsair H100 W10 Pro|Start10 U2713HM+U22 LED+ACz1 Mount 
KeyboardPowerCaseMouse
RealForce 87U 55g  Corsair HX1050 Corsair 650D Razer DeathAdder+Firefly 
Audio
STX+SP2500, Asgard 2+HD650 
CPUGraphicsRAMHard Drive
Intel i7 6500U nVidia GTX 960m OC Samsung 16GB 1.35v M.2 850 EVO 500GB+1TB WD 
OSMonitorKeyboard
W10|Start 10 IPS 4k, Touch Alienware FX 
CPUGraphicsRAMHard Drive
Intel i7 4785T @3.2Ghz 8MB nVidia 860m OC vBIOS mod HyperX Impact 16GB DDR3 256GB Samsung SSD+1TB HDD 
OSAudio
W10|Start 10 DragonFly v1.2 
  hide details  
Reply
post #3 of 4
Search if your BIOS has an Option called Memory Remapping.

What may be the cause here there is a space from 3.5-4GB where PCI Devices map their Adresses, to make this memmap space visible to the OS.

So if the PCI space overlaps your ram mappings only the PCI space is useable and the RAM addresses are just discarded, with Memory remapping the space from 3-4GB i put in the space from 4-5 GB.

SO the bios would report 0-3GB + 4-17GB to the system and make the hole 16GB available.
post #4 of 4
Yeah sounds like memory mapping with some device... or NT is marking sections of physical memory as bad. Get memtest86+ on it.
Ol' Sandy
(28 items)
 
"Zeus"
(12 items)
 
Elite Preview
(6 items)
 
CPUMotherboardGraphicsRAM
Intel Xeon E3-1230v3 Gigabyte GA-Z97X-UD5H-BK MSI Gaming GTX 980 Kingston 32GB (4x8) 
Hard DriveHard DriveHard DriveHard Drive
Plextor PX-256M5S 256GB Samsung EVO 1TB Hitachi HDS721010CLA332 Hitachi HDS723020BLA642 
Hard DriveHard DriveHard DriveOptical Drive
Hitachi HDS723020BLA642 Hitachi HUA722010CLA330 WDC WD10EARS-00Z5B1 TSSTcorp CDDVDW SH-S223B 
CoolingCoolingOSMonitor
Phanteks PH-TC14PE with TY-140's Lamptron FCv5 (x2) Windows 8 Pro 64-bit Dell U2412M 
MonitorMonitorMonitorKeyboard
Dell U2412M Dell U2212HM Dell U2713HM Topre Realforce 87UB | Ducky DK9087 G2 Pro 
PowerCaseMouseMouse Pad
Corsair AX-750 Corsair Obsidian 650D Logitech G700 XTRAC Ripper XXL 
AudioAudioAudioAudio
Beyerdynamic DT-770 Pro 250ohm Schiit Bifrost DAC Schiit Asgard 2 HiVi Swan M50W 2.1 
CPUMotherboardRAMHard Drive
Intel Xeon E5-2620 Super Micro X9SRL-F-B 128GB 1333MHz LSI 9271-8i 
OSPowerCase
VMware ESXi 5.5 SeaSonic SS-400FL2 Fractal Define R3 
CPUMotherboardGraphicsRAM
Intel Core i5-3437U HP EliteBook Folio 9470m  Intel HD Graphics 4000  16GB DDR3 SDRAM 
Hard DriveOS
256GB SSD Windows 10 Insider Preview 
  hide details  
Reply
Ol' Sandy
(28 items)
 
"Zeus"
(12 items)
 
Elite Preview
(6 items)
 
CPUMotherboardGraphicsRAM
Intel Xeon E3-1230v3 Gigabyte GA-Z97X-UD5H-BK MSI Gaming GTX 980 Kingston 32GB (4x8) 
Hard DriveHard DriveHard DriveHard Drive
Plextor PX-256M5S 256GB Samsung EVO 1TB Hitachi HDS721010CLA332 Hitachi HDS723020BLA642 
Hard DriveHard DriveHard DriveOptical Drive
Hitachi HDS723020BLA642 Hitachi HUA722010CLA330 WDC WD10EARS-00Z5B1 TSSTcorp CDDVDW SH-S223B 
CoolingCoolingOSMonitor
Phanteks PH-TC14PE with TY-140's Lamptron FCv5 (x2) Windows 8 Pro 64-bit Dell U2412M 
MonitorMonitorMonitorKeyboard
Dell U2412M Dell U2212HM Dell U2713HM Topre Realforce 87UB | Ducky DK9087 G2 Pro 
PowerCaseMouseMouse Pad
Corsair AX-750 Corsair Obsidian 650D Logitech G700 XTRAC Ripper XXL 
AudioAudioAudioAudio
Beyerdynamic DT-770 Pro 250ohm Schiit Bifrost DAC Schiit Asgard 2 HiVi Swan M50W 2.1 
CPUMotherboardRAMHard Drive
Intel Xeon E5-2620 Super Micro X9SRL-F-B 128GB 1333MHz LSI 9271-8i 
OSPowerCase
VMware ESXi 5.5 SeaSonic SS-400FL2 Fractal Define R3 
CPUMotherboardGraphicsRAM
Intel Core i5-3437U HP EliteBook Folio 9470m  Intel HD Graphics 4000  16GB DDR3 SDRAM 
Hard DriveOS
256GB SSD Windows 10 Insider Preview 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Memory
Overclock.net › Forums › Components › Memory › 16gb shows up as 15.6gb