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3.95 RAM usable of the 8GB

Last response: in Components
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October 27, 2012 8:09:42 PM

Hello people,

I just builded my new pc, and I found a problem about my RAM. I have installed 8GB of RAM, but my pc shows that only 3.95 is usable. When checking at CPU-Z it's telling me it is running in Single-Channel, but it's Dual-Channel RAM. I only have 2 RAM slots on my mobo so I don't know what's the problem. I already unchecked the Maximum Memory thing at msconfig. Somebody help?


PC specs:
Motherboard :: ASRock FM2A75M-DGS
Processor :: AMD A10-5800K QUAD (4 CPUs), ~3.8GHz
Memory :: G-Skill RipjawsX 8192MB - 1600MHz
Video Card :: EVGA Nvidia GeForce GTX 460
Hard Disk :: Seagate 500GB 7200RPM
Power Supply :: OCZ Fatal1ty 550W

More about : ram usable 8gb

October 27, 2012 8:31:57 PM

Try one memory stick at a time. I'm pretty sure on of them is faulty.
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October 27, 2012 8:33:13 PM

You did not say so I will ask are you using a 64bit OS like Windows 7 x64? Windows 7 32bit can only use a max of 4gig of ram.
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October 27, 2012 9:09:56 PM

What version of windows are you using?

If you are using 32bit windows, then you won't be able to utilize more than 4GB of memory.
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October 28, 2012 3:30:18 PM

Oh yeah, forgot to say, I have windows 64-bits..
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October 28, 2012 3:33:42 PM

noidea_77 said:
Try one memory stick at a time. I'm pretty sure on of them is faulty.


Already tried that, they both work.
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October 28, 2012 3:58:57 PM

Are they the same kind of RAM?

Have you tried each stick in each slot individually (four possible combinations)? Could be a faulty slot on the mobo.

If so, have you tried any other sticks of RAM in both slots at the same time? Could be a faulty controller/north bridge/whatever it is that controls those things on a mobo.
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October 28, 2012 4:16:16 PM

thuggish said:
Are they the same kind of RAM?

Have you tried each stick in each slot individually (four possible combinations)? Could be a faulty slot on the mobo.

If so, have you tried any other sticks of RAM in both slots at the same time? Could be a faulty controller/north bridge/whatever it is that controls those things on a mobo.


Yep, it are two sticks of G-Skill RipjawsX 4GB. I only got two slots on my mobo, so that won't be the problem. I got some old RAM here but it's 2x 2GB, I can try that. I only got no time to try it now, so I will let you know later.
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