There is nothing wrong with your RAM. The apparent missing RAM is because the video card used physical RAM to work. It is an "integrated" video card.
From
http://exactchoice.cnet.com/ProductProfile.aspx?id=5282:
Integrated Intel Graphics Media Accelerator 950
"Integrated graphics" is a relatively low-cost approach to graphics, designed for the majority of computer users who mainly use email, surf the Internet, or work with productivity programs. In fact, the Graphics Media Accelerator (GMA) 950 has enough horsepower to do these things across two displays. Where high-performance graphics matter is 3D gaming and other graphics-intensive applications. In these areas, the GMA 950 will pale in comparison to even a $100 add-in graphics card.
From
http://en.wikipedia.org/wiki/Graphics_card:
Integrated
In today's OEM computer market, graphics cards are often substituted for an integrated graphics chip on a section of the motherboard. Sometimes the graphics chip is located on the Northbridge chip, if present, and uses either its own dedicated memory or, more commonly, a portion of the system memory (shared memory). Increasingly, it is possible to select the amount of shared memory to be used via the BIOS. Integrated-graphics-displays typically have inferior 3D performance compared to dedicated graphics cards due to the use of cheaper chipsets and sharing system memory rather than using dedicated memory. This is not always the case, as evidenced in higher-end integrated solutions, such as game-oriented laptop architectures. Those who require high performance still prefer non-integrated solutions.
Integrated graphics displays have gradually become more common in pre-built computer systems since the mid 1990s as computer manufacturers such as Hewlett-Packard and Dell look for ways to cut costs while still providing basic video support. In terms of office tasks, web-browsing, email and similar computer activities, integrated graphics displays are a more practical solution than high-powered 3D graphics cards. First person shooter games like DOOM relied on high-performance cards at the time the game was introduced.