GeForce 830M vs Radeon HD 5870

Intro

Compare all of that to the Radeon HD 5870, which features GPU core speed of 850 MHz, and 1024 MB of GDDR5 memory running at 1200 MHz through a 256-bit bus. It also features 1600(320x5) SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

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 should theoretically perform quite a bit faster than the GeForce 830M in general. (explain)

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

Texel Rate

The Radeon HD 5870 is a lot (about 313%) more effective at anisotropic filtering than the GeForce 830M. (explain)

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

Pixel Rate

The Radeon HD 5870 is quite a bit (approximately 230%) better at full screen anti-aliasing than the GeForce 830M, and capable of handling higher resolutions better. (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: Bandwidth is the max amount of information (counted in MB per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.