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In computing, hardware overlay, a type of video overlay, provides a method of rendering an image to a display screen with a dedicated memory buffer inside computer video hardware. The technique aims to improve the display of a fast-moving video image — such as a computer game , a DVD , or the signal from a TV card .
Most early personal computers used a shared memory design with graphics hardware sharing memory with the CPU. Such designs saved money as a single bank of DRAM could be used for both display and program. Examples of this include the Apple II computer, the Commodore 64, the Radio Shack Color Computer, the Atari ST, and the Apple Macintosh.
The laptop also featured a physical switch that could disable or enable the discrete graphics card at will and make the computer use the integrated processor GPU to increase battery life. It had 4 GB of DDR3-1333 memory soldered to the motherboard, and one open RAM slot which was customer-accessible and supported an additional 4 GB of RAM.
Unlike the D630, the D630c model laptop could not be ordered with Intel graphics; it shipped only with the Nvidia graphics chip. As a result, all of the Latitude D630c laptops eventually fail. It also could only be ordered with the Intel 4965AGN wireless card; it couldn't be configured with Dell's wireless options or lower end Intel wireless cards.
Intel HD Graphics, featuring minimal power consumption that is important in laptops, was capable enough that PC manufacturers often stopped offering discrete graphics options in both low-end and high-end laptop lines, where reduced dimensions and low power consumption are important.
Nvidia Optimus is a computer GPU switching technology created by Nvidia which, depending on the resource load generated by client software applications, will seamlessly switch between two graphics adapters within a computer system in order to provide either maximum performance or minimum power draw from the system's graphics rendering hardware.
For laptops that have NVIDIA Optimus on as well as rendering through the CPU's integrated graphics framebuffer as opposed to its own, the passthrough is more complicated, requiring a remote rendering display or service, the use of Intel GVT-g, as well as integrating the VBIOS into the boot configuration due to the VBIOS being present in the ...
The price of graphics hardware varies with its power and speed. Most high-end gaming hardware are dedicated graphics cards that cost from $200 up to the price of a new computer. In the graphics cards department, using integrated chips is much cheaper than buying a dedicated card, however the performance conforms to the price.