I acquired my new asus m3a78-cm board, the problems were it could not open my game like dirt,cod2,cod4, cod-waw. it will log during the start of the game. I CHANGE MY DDR2 1G TO 2G BUT STILL IT DID NOT WORK. what is the problem?

Mam there is a problem in the graphic card i am suggesting u to install this graphic card Our powerful Asus M3A78-CM AMD780V Socket AMD AM2+/AM2 motherboard puts a world of high-definition entertainment at your command. Now available for an amazingly affordable price, the M3A78-CM works with the latest AMD Phenom Quad-Core processors and supports dual-channel DDR2 1066/800/667/533 memory, Hybrid CrossFireX, and multi-display (DP/DVI/RGB). Based on the AMD 780V/SB700 chipset, the Asus M3A78-CM also supports 64-bit processing, PCIe 2.0, HD-DVD, Blu-Ray playback, SATA 3Gb/s, high-definition audio, Gigabit LAN, ASUS Q-Fan, USB 2.0, ASUS CrashFree BIOS3, ASUS EZ Flash2, C.P.R. (CPU Parameter Recall), and MyLogo2. The AMD 780V Northbridge is the latest AMD chipset designed for both HT1.0 and 5200MT/s HyperTransport™ 3.0 (HT 3.0) interface speed and external graphics in PCI Express™ 2.0 standard. It features the integrated ATI RV610-based graphics and fully DirectX 10.0 compliant. Awesome graphics at an affordable price.

Could be a number of things.try totally different memory, cpu, motherboard. swap things out til you find the one thats the culprit.