GeForce GT 440 1.5GB vs Radeon HD 4770

Intro

Compare that to the Radeon HD 4770, which makes use of a 40 nm design. AMD has clocked the core speed at 750 MHz. The GDDR5 memory is set to run at a frequency of 800 MHz on this specific card. It features 640(128x5) SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
Radeon HD 4770		80 Watts
	Difference: 24 Watts (43%)

Memory Bandwidth

Theoretically, the Radeon HD 4770 should be a small bit faster than the GeForce GT 440 1.5GB in general. (explain)

Radeon HD 4770		51200 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 8000 (19%)

Texel Rate

The Radeon HD 4770 should be much (about 68%) faster with regards to anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

Radeon HD 4770		24000 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 9744 (68%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GT 440 1.5GB is the winner, but not by far. (explain)

GeForce GT 440 1.5GB		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 maximum amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 are applied per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

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