GeForce GT 430 (OEM) vs Radeon HD 4790

Intro

Compare all of that to the Radeon HD 4790, which makes use of a 55 nm design. AMD has set the core speed at 600 MHz. The GDDR5 memory works at a speed of 800 MHz on this particular model. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

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

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

Texel Rate

The Radeon HD 4790 should be a lot (about 71%) better at anisotropic filtering than the GeForce GT 430 (OEM). (explain)

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

Pixel Rate

The Radeon HD 4790 should be much (approximately 243%) more effective at full screen anti-aliasing than the GeForce GT 430 (OEM), and should be able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 4790		9600 Mpixels/sec
GeForce GT 430 (OEM)		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: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.