GeForce GT 130 vs Radeon HD 6770

Intro

Compare all that to the Radeon HD 6770, which has core speeds of 900 MHz on the GPU, and 1050 MHz on the 512 MB of GDDR5 RAM. It features 800 SPUs along with 40 Texture Address Units 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

In theory, the Radeon HD 6770 should be a lot faster than the GeForce GT 130 overall. (explain)

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

Texel Rate

The Radeon HD 6770 should be quite a bit (more or less 200%) faster with regards to AF 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 should be much (approximately 80%) faster with regards to anti-aliasing than the GeForce GT 130, and also should be able to handle higher screen resolutions without slowing down too much. (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: Bandwidth is the max amount of information (in units of megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends 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.