Asus Sabertooth x58 board only posts 8gb instead of 12gb

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hardreset81

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This problem is driving me insane.

Asus Sabertooth x58 board
i7 960 3.20ghz
3x 4gb Corsair Vengence 1600mhz

Tried in triple channel mode and bios posts 4gb, fit Ram in slot A1,A2 + B1 bios posts 8gb, tried changing settings in Ai Tweaker and makes no difference. Any help to save my sanity would be much appreciated
 

My Computer My Computer

At a glance

Windows 7 Ultimate x64Intel i7 960 3.20ghz3X4gb Corsair VengenceAMD Radeon HD
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Build
OS
Windows 7 Ultimate x64
CPU
Intel i7 960 3.20ghz
Motherboard
Asus Sabertooth x58
Memory
3X4gb Corsair Vengence
Graphics Card(s)
AMD Radeon HD
Hard Drives
1tb Seagate
Antivirus
Avast
Browser
Firefox
Have you tested each RAM stick individually to see if you can boot from it? Maybe you have a bad stick.
 

My Computer My Computer

At a glance

Win 7 Pro x64/Win 10 Pro x64 dual bootAMD FX 8350 Vishera @ 420016 GB Mushkin Blackline DDR3-2400 @ 1866 (9-1...XFX Radeon R9 280 Double D Black Edition
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Mellon Labs (custom build)
OS
Win 7 Pro x64/Win 10 Pro x64 dual boot
CPU
AMD FX 8350 Vishera @ 4200
Motherboard
ASUS M5A97 R2.0
Memory
16 GB Mushkin Blackline DDR3-2400 @ 1866 (9-10-10-10-31)
Graphics Card(s)
XFX Radeon R9 280 Double D Black Edition
Sound Card
Realtek HD Audio on MB. Sounds great.
Monitor(s) Displays
Acer 24", Acer 22"
Screen Resolution
3840 x 1080
Hard Drives
1 x Mushkin Chronos 120 GB SSD (Win 10)
1 x Samsung 850 EVO 250 GB SSD (Win 7)
1 x WD 1TB SATA Blue
1 x WD 1TB SATA Green
PSU
Corsair TX-750
Case
CoolerMaster HAF 912+
Cooling
Coolermaster Seidon 240M Liquid AIO. 6 case fans
Keyboard
Logitech G710+
Mouse
Logitech G500s
Internet Speed
Much better since I got fiber, but still way overpriced.
Antivirus
MSE, Malware Bytes for scanning
Browser
Firefox
Other Info
Corsair VOID USB headphones.

A Mellon Labs X-1 - LCD Smartie driven system status display.

Brought to you by the letter E
Yup tried single stick they all post 4gb no problem, also tried removing cpu and reseating it with fresh compound. Also tried loosing heatsink as it was overly tight.
 

My Computer My Computer

At a glance

Windows 7 Ultimate x64Intel i7 960 3.20ghz3X4gb Corsair VengenceAMD Radeon HD
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Build
OS
Windows 7 Ultimate x64
CPU
Intel i7 960 3.20ghz
Motherboard
Asus Sabertooth x58
Memory
3X4gb Corsair Vengence
Graphics Card(s)
AMD Radeon HD
Hard Drives
1tb Seagate
Antivirus
Avast
Browser
Firefox
Try one module in each memory slot and see what happens. I had a (new) ASRock Z77 motherboard and it had a bad memory slot (confirmed by ASRock Tech). It obviously was returned as defective.

A BIOS (CMOS) Reset may help if each slot tests good.
 

My Computer My Computer

At a glance

Windows 10 64 bitIntel i7 6700K16GB Corsair DominatorIntel CPU Graphics
Computer type
PC/Desktop
Computer Manufacturer/Model Number
My Own Build
OS
Windows 10 64 bit
CPU
Intel i7 6700K
Motherboard
ASUS ROG Maximus VIII Hero
Memory
16GB Corsair Dominator
Graphics Card(s)
Intel CPU Graphics
Sound Card
RealTek
Monitor(s) Displays
27" Dell S2719dgf
Screen Resolution
2560X1440
Hard Drives
1 TB Samsung 850 EVO SSD for Win 10 Pro
500GB Samsung 850 EVO SSD for Win 10 Insider
2 TB drive for backup
PSU
EVGA Supernova 750G2
Case
BeQuiet Silent Base 600
Cooling
Deepcool Captain 120EX
Keyboard
Microsoft Wireless 2000
Mouse
Microsoft wireless
Internet Speed
100 MB/sec (Cable)
Antivirus
Microsoft Defender and Malwarebytes
Browser
Edge/Firefox
Other Info
Cakewalk (Sonar) by BandLab and Studio One 4.1 Pro recording studio software. MOTU 896Mk3 Hybrid recording interface, Frontier Tranzport wireless control unit, Behringer X-Touch Control Surface.
Five USB connected optical drives for CD Audio production using Nero BurningROM
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