GeForce GT 130 vs Radeon HD 7870

Intro

Compare all of that to the Radeon HD 7870, which makes use of a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 memory works at a speed of 1200 MHz on this model. It features 1280 SPUs along with 80 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 130		75 Watts
Radeon HD 7870		175 Watts
	Difference: 100 Watts (133%)

Memory Bandwidth

In theory, the Radeon HD 7870 is 1180% quicker than the GeForce GT 130 overall, because of its higher bandwidth. (explain)

Radeon HD 7870		153600 MB/sec
GeForce GT 130		12000 MB/sec
	Difference: 141600 (1180%)

Texel Rate

The Radeon HD 7870 will be much (about 567%) faster with regards to anisotropic filtering than the GeForce GT 130. (explain)

Radeon HD 7870		80000 Mtexels/sec
GeForce GT 130		12000 Mtexels/sec
	Difference: 68000 (567%)

Pixel Rate

The Radeon HD 7870 will be quite a bit (about 300%) better at anti-aliasing than the GeForce GT 130, and should be able to handle higher resolutions more effectively. (explain)

Radeon HD 7870		32000 Mpixels/sec
GeForce GT 130		8000 Mpixels/sec
	Difference: 24000 (300%)

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 (in units of MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the card will be at 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 graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called 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.