GeForce GT 440 1.5GB vs Radeon HD 6770 1GB

Intro

Compare all that to the Radeon HD 6770 1GB, which comes with core clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 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 440 1.5GB		56 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 52 Watts (93%)

Memory Bandwidth

In theory, the Radeon HD 6770 1GB will be 56% faster than the GeForce GT 440 1.5GB overall, because of its greater bandwidth. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 24000 (56%)

Texel Rate

The Radeon HD 6770 1GB should be a lot (more or less 153%) faster with regards to anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 21744 (153%)

Pixel Rate

The Radeon HD 6770 1GB should be a little bit (more or less 1%) better at anti-aliasing than the GeForce GT 440 1.5GB, and should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce GT 440 1.5GB		14256 Mpixels/sec
	Difference: 144 (1%)

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 largest amount of data (counted in megabytes per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs 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, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.