GeForce GTX 860M vs Radeon HD 4830 1GB

Intro

Compare that to the Radeon HD 4830 1GB, which makes use of a 55 nm design. AMD has set the core frequency at 575 MHz. The GDDR4 memory is set to run at a speed of 900 MHz on this model. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M		45 Watts
Radeon HD 4830 1GB		95 Watts
	Difference: 50 Watts (111%)

Memory Bandwidth

In theory, the GeForce GTX 860M should be a small bit faster than the Radeon HD 4830 1GB in general. (explain)

GeForce GTX 860M		64000 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 6400 (11%)

Texel Rate

The GeForce GTX 860M will be much (about 316%) better at texture filtering than the Radeon HD 4830 1GB. (explain)

GeForce GTX 860M		76512 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 58112 (316%)

Pixel Rate

The GeForce GTX 860M will be quite a bit (about 39%) better at full screen anti-aliasing than the Radeon HD 4830 1GB, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 860M		12752 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 3552 (39%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.