GeForce 830M vs Radeon HD 5870

Intro

Compare that to the Radeon HD 5870, which uses a 40 nm design. AMD has clocked the core frequency at 850 MHz. The GDDR5 RAM works at a frequency of 1200 MHz on this specific model. It features 1600(320x5) SPUs as well as 80 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Radeon HD 5870		188 Watts
	Difference: 163 Watts (652%)

Memory Bandwidth

The Radeon HD 5870, in theory, should be quite a bit faster than the GeForce 830M overall. (explain)

Radeon HD 5870		153600 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 139200 (967%)

Texel Rate

The Radeon HD 5870 should be a lot (more or less 313%) better at AF than the GeForce 830M. (explain)

Radeon HD 5870		68000 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 51536 (313%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 5870 is superior to the GeForce 830M, and very much so. (explain)

Radeon HD 5870		27200 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 18968 (230%)

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 MB per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.