WD green disk is weak in hard disk. If the budget is limited and large storage space is needed, WD Blu-ray Disc is recommended. WD Green Disk is suitable for hanging and storing high-definition movies or materials. WD black disk has good performance but the most expensive price. If there are requirements for disk performance, you may wish to use WD black disk.
Asus is not recommended for graphics cards, and the same performance is nearly 20% more expensive. In fact, the quality of cards like ZOTAC and Zhong Ying is also good, and they are all made by Baineng Factory (the factory that makes AMD original cards), and the price is much more affordable than ASUS. Most of Ingchi's cards are now made in Tongde, and the quality is good. For example, Sotai GTX550Ti- 1GD5 Thunder Edition and Galaxy GTX550Ti Black General.
4GX2 memory is very necessary if you plan to use a 64-bit system and run software such as 3DS MAX or MAYA. However, if you only run a 32-bit system or just play games, in fact, 4G memory is enough. Because the 32-bit VISTA/WIN7 system actually only supports 4G memory, and almost no games on the market can occupy all 4G memory.