GeForce GT 440 1.5GB vs Radeon HD 4830 1GB

Intro

Compare all that to the Radeon HD 4830 1GB, which uses a 55 nm design. AMD has set the core speed at 575 MHz. The GDDR4 RAM works at a speed of 900 MHz on this specific card. It features 640(128x5) SPUs as well as 32 Texture Address Units 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 4830 1GB		95 Watts
	Difference: 39 Watts (70%)

Memory Bandwidth

The Radeon HD 4830 1GB, in theory, should be much faster than the GeForce GT 440 1.5GB in general. (explain)

Radeon HD 4830 1GB		57600 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 14400 (33%)

Texel Rate

The Radeon HD 4830 1GB should be quite a bit (about 29%) better at anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

Radeon HD 4830 1GB		18400 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 4144 (29%)

Pixel Rate

The GeForce GT 440 1.5GB is much (more or less 55%) better at AA than the Radeon HD 4830 1GB, and also will be capable of handling higher resolutions while still performing well. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 5056 (55%)

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 maximum amount of data (measured in MB per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 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 number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.