When the ATI Radeon graphics cards are configured properly in a fast laptop computer it can take advantage of the 1917MB of video memory it can make available to the system. The really interesting aspect of this is that the memory is only used when needed and this in conjunction with the actual system memory means that laptops with this are going to be slightly faster even under heavy gaming. Most of the cheap fast laptops are going to also have video cards that do indeed supply a great amount of their own memory otherwise they would pull too many of the actual system resources for themselves.
It used to be that the memory would not be shared very equally and some computers would slow down considerably when the additional video requirements were needed. This could come from certain applications or other very basic needs, yet it would be especially true if it was concerning computer games which were graphic intensive.
The same is true today however with the higher end video capabilities that you can find within a variety of cheap laptop computers today, like the aforementioned Radeon card you will not see any notable lag or loss of system performance under most of the demanding situations which the games can require. There are other benefits too like the intensive details and clarity that you can receive by employing the HDMI ports for even more clarity in your high definition applications. The ability to go out into other devices through these ports, for instance into large LCD TV sets can improve the viewing experience of any environment and one of the most commonly used methods is in homes where people can simply enjoy the technology and the quality it brings to the viewing experience.
The video capabilities are not the only thing that really makes many of the cheapest laptops fast in their performance but they do keep the system from being too bogged down by other tasks which the computer needs to address. The amount of memory which new, used and refurbished laptops under £200 can handle (even those several years old), is far greater than what it once was so the sharing of resources is nowhere near the concern which it had been either. Also, since technology keeps progressing in mobile computing devices so constantly we are seeing even more features that bring more speed and versatility to laptops. Look at the high speed USB ports which fast affordable laptops come with currently. These allow for fast digital video and audio transfers in addition to fast data transfers. This all adds up to great performance in a multimedia situation and responsive, fast performance from the laptop in nearly any circumstance.