GeForce GT 130 vs Radeon HD 7770

Intro

Compare those specifications to the Radeon HD 7770, which comes with core speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 memory. It features 640 SPUs along with 40 TAUs and 16 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 7770		80 Watts
	Difference: 5 Watts (7%)

Memory Bandwidth

In theory, the Radeon HD 7770 should perform much faster than the GeForce GT 130 in general. (explain)

Radeon HD 7770		72000 MB/sec
GeForce GT 130		12000 MB/sec
	Difference: 60000 (500%)

Texel Rate

The Radeon HD 7770 will be much (about 233%) more effective at AF than the GeForce GT 130. (explain)

Radeon HD 7770		40000 Mtexels/sec
GeForce GT 130		12000 Mtexels/sec
	Difference: 28000 (233%)

Pixel Rate

The Radeon HD 7770 should be quite a bit (more or less 100%) better at AA than the GeForce GT 130, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 7770		16000 Mpixels/sec
GeForce GT 130		8000 Mpixels/sec
	Difference: 8000 (100%)

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 megabytes per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, 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 that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number 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 filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.