GeForce GTX 860M vs Radeon HD 4830 512MB

Intro

Compare that to the Radeon HD 4830 512MB, which comes with clock speeds of 575 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 RAM. 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 512MB		95 Watts
	Difference: 50 Watts (111%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 860M should theoretically be a little bit superior to the Radeon HD 4830 512MB overall. (explain)

GeForce GTX 860M		64000 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 6400 (11%)

Texel Rate

The GeForce GTX 860M is a lot (about 316%) faster with regards to AF than the Radeon HD 4830 512MB. (explain)

GeForce GTX 860M		76512 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 58112 (316%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 860M is a better choice, and very much so. (explain)

GeForce GTX 860M		12752 Mpixels/sec
Radeon HD 4830 512MB		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: Bandwidth is the max amount of data (measured in MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the 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 video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.