hi friends, this is a weird observation..i dont know why. please explain. i have 2 GB of RAM in 2 slots = 4GB total ( 3.85 to 3.9 GB) in bios i set shared by gpu = 256MB so logically the system should show nearly 3750MB or near 3650MB (i know it is never round figures) please see the screen shots of system properties, GPUZ and dxdiag .. all showing different values --------------- Processor Model : AMD Phenom(tm) 8650 Triple-Core Processor Speed : 2.3GHz Cores per Processor : 3 Unit(s) Mainboard : Asus M3N78-EM Chipset Model : AMD F10h Athlon 64/Opteron/Sempron HT Hub Front Side Bus Speed : 2x 1.8GHz (3.6GHz) Total Memory : 4GB DIMM DDR2 Memory Bus Speed : 2x 333MHz (666MHz) Memory Module(s) Memory Module : Transcend JM800QLU-2G 2GB DIMM DDR2 PC2-6400U DDR2-800 (5-5-5-18 3-23-6-3) Memory Module : Transcend JM800QLU-2G 2GB DIMM DDR2 PC2-6400U DDR2-800 (5-6-6-18 3-24-6-3) Video System Video Adapter : NVIDIA GeForce 8300 (24 SP 1.5GHz, 256MB DDR2, Integrated Graphics) Graphics Processor Adapter : NVIDIA GeForce 8300 (8SP 1C 1.5GHz, 253.7MB, Integrated Graphics)