8 GB RAM only 3.90 GB Usable

ankit360

Honorable
Nov 15, 2013
8
0
10,510
8GB Only 3.90 GB usable
as per mobo manual i install KHX1600C9D3B1/4G RAM on slot A2 and B2
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But BIOS show only 4 GB total RAM
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CPUZ show 8GB But Windows show 8GB 3.90 GB usable
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Same happen if i install RAM on A1 B1 slot
PC won't Boot if i install RAM on B1 B1 slot
If i install RAM on A1 A2 slot
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BIOS show 8GB RAM
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Windows also able to use all 8 GB RAM now
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I Build totally new PC With
2x Kingston HyperX Blu DDR3 4 GB PC RAM (KHX1600C9D3B1/4G)
AMD FX 6300 (no overclock ) none pin bend
Asus M5A97 LE R2.0

Help me guys

 

ankit360

Honorable
Nov 15, 2013
8
0
10,510


if i put it on slot 1 & 3 i get only 4gb ram

windows show me 8GB (3.97GB usable) same with slot 2 & 4

if i put it in slot 1 & 2 is see all 8GB ram usable . but that's only on Single Channel mode
 

ankit360

Honorable
Nov 15, 2013
8
0
10,510


it's already unchecked