If user try to insert a PCI-E VGA card + H55 series motherboards + Clarkdale CPU + 4GB Memory module, then Win7 64Bit O.S will only recognize 3.87GB.
This is because Intel define two block area to reserve as EP-UMA (1-64MB) + 0MB-64MB wasted. So system will not be able to recognize full 4GB OS due to chipset limitation.
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