GeForce GTX 860M vs Radeon HD 4830 1GB

Intro

Compare those specifications to the Radeon HD 4830 1GB, which comes with core speeds of 575 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR4 memory. It features 640(128x5) SPUs as well as 32 TAUs 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

The GeForce GTX 860M, in theory, should perform just a bit faster than the Radeon HD 4830 1GB overall. (explain)

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

Texel Rate

The GeForce GTX 860M is a lot (about 316%) faster with regards to 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

If using lots of anti-aliasing is important to you, then the GeForce GTX 860M is the winner, by far. (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 transported past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.