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12GB only 9.99gb usable in Windows problem

post #1 of 6
Thread Starter 
I just recently bought another 3x2gb set of G.SKILL DDR3 1600 RAM. It's the same exact set of memory as the set I already have installed on my mobo. The problem is that when I booted into windows, I saw that it recognizes the full 12gb of ram, but it says that only 9.99gb of Ram is usable.

I went into CPU-Z to confirm that all of my sticks were being read and they indeed were, all being read as the same specs as well mind you. So for some reason the total amount of RAM that is addressable is only 9.99gb and the last 2gb of RAM is just sitting there unused.

Does anyone have any idea as to what could be the cause of this?
 
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980X Build
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post #2 of 6
One of the new 2GB modules may be bad. Someone on another forum just had a similar issue and when he had the module replaced, it fixed it. His was failing tests though, so if yours isn't, then I don't know other than perhaps an unstable setup if you're using manual settings? Your voltages for 6GB might not be enough anymore for 12GB. Did you set it all to stock and try? Did you try with just one module at a time from the new three?
post #3 of 6
Windows 7 Home Premium supports 16Gb Max if you have that.
It could be a dead Stick.
For me when i had this problem was because my CPU socked was a bit dirty. Take out the CPU and clean the bottom and see if there is any dust or thermal paste in the socket.
To check for Bad RAM just test them one by one and then test the RAM slots.
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Ishimura
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post #4 of 6
Thread Starter 
Quote:
Originally Posted by Princess Garnet View Post

One of the new 2GB modules may be bad. Someone on another forum just had a similar issue and when he had the module replaced, it fixed it. His was failing tests though, so if yours isn't, then I don't know other than perhaps an unstable setup if you're using manual settings? Your voltages for 6GB might not be enough anymore for 12GB. Did you set it all to stock and try? Did you try with just one module at a time from the new three?

I have not had a chance to test the sticks to be honest, although I do have manual settings on for the RAM from before as well as the multiplier upped for the CPU. I could try putting it back to AUTO for everything and see if that clears it up. The problem is with testing these sticks it will be extremely hard to get one of them out due to the immense size of the Noctua DH-14 frown.gif. One of the sticks is basically underneath the cooler and it took me a while to properly seat that new stick.
Quote:
Originally Posted by ZealotKi11er View Post

Windows 7 Home Premium supports 16Gb Max if you have that.
It could be a dead Stick.
For me when i had this problem was because my CPU socked was a bit dirty. Take out the CPU and clean the bottom and see if there is any dust or thermal paste in the socket.
To check for Bad RAM just test them one by one and then test the RAM slots.

I have windows 7 professional 64-bit. I could try to check the CPU socket, although I probably don't have the time this weekend.

I guess for right now I'll try going stock for everything and see what happens.
 
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Intel Ivy Bridge Core i7-3770K 4.5GHz @ 1.255V ASUS Sabertooth Z77 EVGA GeForce GTX 780ti G. Skill Ripjaws Z Series DDR3 2400 8GB (2 x 4GB) 
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980X Build
(17 items)
 
 
CPUMotherboardGraphicsRAM
Intel Ivy Bridge Core i7-3770K 4.5GHz @ 1.255V ASUS Sabertooth Z77 EVGA GeForce GTX 780ti G. Skill Ripjaws Z Series DDR3 2400 8GB (2 x 4GB) 
RAMHard DriveHard DriveHard Drive
G. Skill Ripjaws Z Series DDR3 2400 8gb (2 x 4gb) Samsung 850 Pro 256GB Western Digital Caviar Black 1TB Western Digital Caviar Blue 1TB 
Hard DriveOptical DriveCoolingOS
Seagate 5TB LG Blu-Ray Drive Noctua DH-14 Windows 10 x64 Professional 
MonitorMonitorKeyboardPower
Gateway 24.5" HD Acer 23.5" 120Hz Razer Blackwidow Corsair AX1200 
CaseMouseAudio
LDCooling LD PC-V8 White on Black Razer Lachesis Onboard 
CPUMotherboardGraphicsRAM
Intel Core i7 980X Extreme EVGA E760 X58 3xSLI Classified EVGA GTX 680 12gb G. Skill Ripjaw 
Hard DriveHard DriveHard DriveOptical Drive
WD Caviar Black 640GB Intel SSD X25M WD Caviar Black/Blue 1TB LITE ON 24x DVD Writer 
CoolingOSMonitorKeyboard
Noctua NH-D14 Windows 7 Professional 64-bit 24" Gateway HD Razer Lycosa 
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post #5 of 6
Thread Starter 
I set everything back to default mainly including all of the DRAM timings I put in as well as the CPU increase multiplier, but I left the DIMM voltage in there. Voila! 12gb installed and all usable in windows.

It was showing in the BIOS before that only 10gb of RAM was installed and now its showing 12gb. So, I'm guessing that my OC on the CPU (just increased multiplier) and manual timings on the RAM, caused this wierd issue?


Thanks again for the help!!
 
980X Build
(17 items)
 
 
CPUMotherboardGraphicsRAM
Intel Ivy Bridge Core i7-3770K 4.5GHz @ 1.255V ASUS Sabertooth Z77 EVGA GeForce GTX 780ti G. Skill Ripjaws Z Series DDR3 2400 8GB (2 x 4GB) 
RAMHard DriveHard DriveHard Drive
G. Skill Ripjaws Z Series DDR3 2400 8gb (2 x 4gb) Samsung 850 Pro 256GB Western Digital Caviar Black 1TB Western Digital Caviar Blue 1TB 
Hard DriveOptical DriveCoolingOS
Seagate 5TB LG Blu-Ray Drive Noctua DH-14 Windows 10 x64 Professional 
MonitorMonitorKeyboardPower
Gateway 24.5" HD Acer 23.5" 120Hz Razer Blackwidow Corsair AX1200 
CaseMouseAudio
LDCooling LD PC-V8 White on Black Razer Lachesis Onboard 
CPUMotherboardGraphicsRAM
Intel Core i7 980X Extreme EVGA E760 X58 3xSLI Classified EVGA GTX 680 12gb G. Skill Ripjaw 
Hard DriveHard DriveHard DriveOptical Drive
WD Caviar Black 640GB Intel SSD X25M WD Caviar Black/Blue 1TB LITE ON 24x DVD Writer 
CoolingOSMonitorKeyboard
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Reply
 
980X Build
(17 items)
 
 
CPUMotherboardGraphicsRAM
Intel Ivy Bridge Core i7-3770K 4.5GHz @ 1.255V ASUS Sabertooth Z77 EVGA GeForce GTX 780ti G. Skill Ripjaws Z Series DDR3 2400 8GB (2 x 4GB) 
RAMHard DriveHard DriveHard Drive
G. Skill Ripjaws Z Series DDR3 2400 8gb (2 x 4gb) Samsung 850 Pro 256GB Western Digital Caviar Black 1TB Western Digital Caviar Blue 1TB 
Hard DriveOptical DriveCoolingOS
Seagate 5TB LG Blu-Ray Drive Noctua DH-14 Windows 10 x64 Professional 
MonitorMonitorKeyboardPower
Gateway 24.5" HD Acer 23.5" 120Hz Razer Blackwidow Corsair AX1200 
CaseMouseAudio
LDCooling LD PC-V8 White on Black Razer Lachesis Onboard 
CPUMotherboardGraphicsRAM
Intel Core i7 980X Extreme EVGA E760 X58 3xSLI Classified EVGA GTX 680 12gb G. Skill Ripjaw 
Hard DriveHard DriveHard DriveOptical Drive
WD Caviar Black 640GB Intel SSD X25M WD Caviar Black/Blue 1TB LITE ON 24x DVD Writer 
CoolingOSMonitorKeyboard
Noctua NH-D14 Windows 7 Professional 64-bit 24" Gateway HD Razer Lycosa 
PowerCaseMouseAudio
Corsair AX1200 Coolermaster HAF X Razer Lachesis Onboard Audio 
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post #6 of 6
When you tweak your voltages like for the CPU IMC and all that for 6GB, it might be borderline stable, and when you add more RAM, it has issues. That's my guess. I've seen it reported on more Nehalem setups especially than I can count. People's systems are usually just barely stable (though that's what they strive for). I always give mine a bit of extra voltage and let it go with that.

Glad it was sorted though.
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