GeForce GT 440 3GB vs Radeon HD 6770 1GB

Intro

Compare all that to the Radeon HD 6770 1GB, which features core clock 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 Rasterization Operator Units.

Display Graphs

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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

Theoretically speaking, the Radeon HD 6770 1GB should be 56% faster than the GeForce GT 440 3GB overall, because of its higher bandwidth. (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 is quite a bit (about 153%) faster with regards to texture filtering 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 should be a little bit (more or less 1%) more effective at anti-aliasing than the GeForce GT 440 3GB, and should be able to handle higher resolutions without losing too much performance. (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 (in units of MB per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the 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 the core 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.