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Memory not showing as usable in windows 7

Last response: in Motherboards
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September 13, 2011 5:42:38 PM

Hi i recently made my new computer with 16gb of memory. I am using a M4N75TD motherboard and 16gb of corsair memory. When i start up my computer the memok! light comes on as red but eventually turns off. In windows 7 it shows 16 gb installed but only 3.5gb useable. Any ideas on what i can do??
a b Ĉ ASUS
a b $ Windows 7
a b } Memory
a c 121 V Motherboard
September 13, 2011 5:46:16 PM

Are you using Windows 7 32-bit?
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September 13, 2011 5:49:18 PM

The only thing you can do is to install the 64 bit version of Windows 7 after determining yo have the 64 bit drivers for you hardware.
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a c 207 Ĉ ASUS
a b $ Windows 7
a c 347 } Memory
a c 716 V Motherboard
September 13, 2011 5:54:25 PM

Yep, chances are you have a 32-bit version of Windows 7; before buying see -> http://msdn.microsoft.com/en-us/library/aa366778(v=vs.85).aspx#physical_memory_limits_windows_7
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September 13, 2011 5:55:15 PM

You are using Win 7 32 bit which can only address 4GB of memory. I bet 512MB is in your video card, so that leaves 3.5GB of system RAM to address. Reinstall the 64-bit software and you will see all 16GB AND access the 512 on your video card.
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a b V Motherboard
September 13, 2011 6:18:11 PM

And in case you are wondering, yes a 32 bits Windows 7 license key is valid for the 64 bits as well.
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a b Ĉ ASUS
a b $ Windows 7
a b } Memory
a c 121 V Motherboard
September 13, 2011 6:35:10 PM

With the problem that you explained that is really the only logical conclusion.
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September 13, 2011 6:42:43 PM

Is there an easy way to see which version u have installed
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a b Ĉ ASUS
a b $ Windows 7
a b } Memory
a c 121 V Motherboard
September 13, 2011 6:48:08 PM

Go to start
Right click "My Computer"
Choose "Properties"

under system it will say "xx-bit operating system"
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September 13, 2011 6:50:31 PM

Thank guys I will do that after work and fill u in
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September 15, 2011 12:52:51 AM

Ok so apparently i did install the 32 bit version thanks for all the help. probably no easy way to switch right|
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a b V Motherboard
September 15, 2011 1:17:44 AM

No, you cannot switch or upgrade from 32 to 64 bits, it is always a full install.
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