GeForce GT 440 3GB vs Radeon HD 4770

Intro

Compare all of that to the Radeon HD 4770, which features core clock speeds of 750 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs along with 32 TAUs 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 4770		80 Watts
	Difference: 24 Watts (43%)

Memory Bandwidth

The Radeon HD 4770, in theory, should be a little bit faster than the GeForce GT 440 3GB in general. (explain)

Radeon HD 4770		51200 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 8000 (19%)

Texel Rate

The Radeon HD 4770 is quite a bit (approximately 68%) more effective at AF than the GeForce GT 440 3GB. (explain)

Radeon HD 4770		24000 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 9744 (68%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GT 440 3GB is a better choice, though not by far. (explain)

GeForce GT 440 3GB		14256 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 2256 (19%)

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 largest amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR type 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 anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes 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 bandwidth is, the lower the potential to get to the max fill rate.