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Why do I not see all of my memory when using a 32-bit/64-bit based Windows or Linux OS and an AMD Opteron based motherboard?

April 26, 2017AMD based linux memory motherboard opteron OS Windows

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Why do I not see all of my memory when using a 32-bit/64-bit based Windows or Linux OS and an AMD Opteron based motherboard?

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You need to first determine what stepping of AMD Opteron CPU that you are using. If you find out that you are using a D0 stepping or older then you need to go into the bios and make sure memory hole is set to software. If you determine that you have a Ex stepping CPU or newer then you need to make sure memory hole is set to hardware.