GeForce GT 430 vs Radeon HD 4790

Intro

Compare those specifications to the Radeon HD 4790, which makes use of a 55 nm design. AMD has clocked the core frequency at 600 MHz. The GDDR5 memory runs at a speed of 800 MHz on this card. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 4790 should theoretically be much superior to the GeForce GT 430 overall. (explain)

Radeon HD 4790		102400 MB/sec
GeForce GT 430		28800 MB/sec
	Difference: 73600 (256%)

Texel Rate

The Radeon HD 4790 should be much (about 71%) better at texture filtering than the GeForce GT 430. (explain)

Radeon HD 4790		19200 Mtexels/sec
GeForce GT 430		11200 Mtexels/sec
	Difference: 8000 (71%)

Pixel Rate

The Radeon HD 4790 will be a lot (about 243%) better at full screen anti-aliasing than the GeForce GT 430, and also should be able to handle higher resolutions more effectively. (explain)

Radeon HD 4790		9600 Mpixels/sec
GeForce GT 430		2800 Mpixels/sec
	Difference: 6800 (243%)

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 information (measured in megabytes per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. 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 anti-aliasing, HDR and higher screen resolutions.

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

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