GeForce GTX 860M vs Radeon HD 4830 1GB

Intro

Compare those specs to the Radeon HD 4830 1GB, which has core clock 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

Theoretically, the GeForce GTX 860M should be a small 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 will be 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

The GeForce GTX 860M will be much (more or less 39%) better at anti-aliasing than the Radeon HD 4830 1GB, and should be capable of handling higher resolutions without losing too much performance. (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: Bandwidth is the maximum amount of data (counted in MB per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.