Graphics cards can vary in physical size, meaning you should measure the space in your case and compare the area with any graphics cards you’re considering. Graphics cards will list their power requirements in their detailed specifications. Compare this with the capacity of your power supply. This information may be displayed on a sticker on the actual unit, but you may need to check the computer’s documentation instead. Many laptop computers have integrated video cards, which are soldered to the computer’s motherboard and cannot be replaced. Mac laptops in particular are notorious for their difficulty to upgrade. [1] X Research source
GPU (Graphics Processing Unit): This is the processor on your graphics card that manipulates the memory to create images on your screen. They handle graphical processing more efficiently than a computer’s regular CPU. Core clock: This is the a measurement of the speed of the GPU. Higher clock speeds means faster processing. Video RAM (Random Access Memory): VRAM is memory that is used for storing image data. Higher VRAM impacts framerate less than the clock speed, but does help with rendering at higher resolutions. [2] X Research source Memory bandwidth: The memory bandwidth is a measurement of the speed of the video RAM. This helps determine how quickly objects can be rendered and can greatly impact performance. Interface: This is the type of connection used by the graphics card to connect to the motherboard. Most modern graphics cards will use the PCI Express 3. 0 interface. Power Requirement: This is the amount of power required by your computer’s power supply, measured in watts.
A faster clock speed is necessary for fast, on-the-fly processing used in gaming. For something like graphic design/3D rendering, a larger bank of memory for rendering lots of textures will be more useful.
For gaming, you should focus more on bandwidth (the speed with which data is read and stored) than RAM. Bandwidth is typically measured in megahertz or gigahertz (MHz, GHz) while RAM is measured in Gigabytes (GB). [4] X Research source
Hardware and software evolve quickly. A very cheap card may become obsolete very fast, while a top-of-the-line card may drop in price by the time that level of processing power is necessary to run software. All but especially active gamers or designers should be able to find a very good graphics card for less than $400 USD. High-end graphics cards can reach in the thousands of USD. For the majority of people, spending this much is not necessary.
Extra cooling will also draw from your power supply. If you’re already pushing the limits with the card, then you may want to consider upgrading the power supply as well.
