GeForce GT 130 vs Radeon HD 6770

Intro

Compare those specs to the Radeon HD 6770, which has core speeds of 900 MHz on the GPU, and 1050 MHz on the 512 MB of GDDR5 memory. It features 800 SPUs as well as 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 6770		108 Watts
	Difference: 33 Watts (44%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6770 should be 460% quicker than the GeForce GT 130 overall, because of its greater bandwidth. (explain)

Radeon HD 6770		67200 MB/sec
GeForce GT 130		12000 MB/sec
	Difference: 55200 (460%)

Texel Rate

The Radeon HD 6770 is much (more or less 200%) more effective at texture filtering than the GeForce GT 130. (explain)

Radeon HD 6770		36000 Mtexels/sec
GeForce GT 130		12000 Mtexels/sec
	Difference: 24000 (200%)

Pixel Rate

The Radeon HD 6770 is much (approximately 80%) faster with regards to full screen anti-aliasing than the GeForce GT 130, and also should be capable of handling higher screen resolutions better. (explain)

Radeon HD 6770		14400 Mpixels/sec
GeForce GT 130		8000 Mpixels/sec
	Difference: 6400 (80%)

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 max amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.