GeForce GT 440 3GB vs Radeon HD 4770

Intro

Compare those specifications to the Radeon HD 4770, which makes use of a 40 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR5 memory is set to run at a speed of 800 MHz on this particular model. It features 640(128x5) SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

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

As far as performance goes, the Radeon HD 4770 should in theory be a little bit better 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 will be a lot (more or less 68%) faster with regards to 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

The GeForce GT 440 3GB is just a bit (more or less 19%) faster with regards to AA than the Radeon HD 4770, and also will be capable of handling higher resolutions without losing too much performance. (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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs 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 rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.