I have just addes a 2 Go memory to the 2go I had so far. they're exactly the same kind, but the new one is not recognized, neither by the bios, not by Windows. "Physical address extension3 is now visible in My Computer/System. Who could give me explanations? Thank you.
Windows XP SP3
Motherboard: Asus P5N-E
Intel Quadcore Q6600 2.40 Ghz
Memory Transcend JM800 DDR2