GeForce GT 440 3GB vs Radeon HD 6770 1GB

Intro

Compare all of that to the Radeon HD 6770 1GB, which comes with core speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 800 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 3GB		56 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 52 Watts (93%)

Memory Bandwidth

The Radeon HD 6770 1GB, in theory, should perform much faster than the GeForce GT 440 3GB overall. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 24000 (56%)

Texel Rate

The Radeon HD 6770 1GB should be quite a bit (about 153%) more effective at AF than the GeForce GT 440 3GB. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 21744 (153%)

Pixel Rate

The Radeon HD 6770 1GB is a bit (approximately 1%) better at full screen anti-aliasing than the GeForce GT 440 3GB, and also should be able to handle higher resolutions more effectively. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce GT 440 3GB		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 max amount of data (counted in megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units by the core 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.