GeForce GT 430 (OEM) vs Radeon HD 4870 1GB

Intro

Compare that to the Radeon HD 4870 1GB, which has a GPU core clock speed of 750 MHz, and 1024 MB of GDDR5 memory set to run at 900 MHz through a 256-bit bus. It also features 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 430 (OEM)		60 Watts
Radeon HD 4870 1GB		150 Watts
	Difference: 90 Watts (150%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 1GB is 300% quicker than the GeForce GT 430 (OEM) overall, due to its higher bandwidth. (explain)

Radeon HD 4870 1GB		115200 MB/sec
GeForce GT 430 (OEM)		28800 MB/sec
	Difference: 86400 (300%)

Texel Rate

The Radeon HD 4870 1GB will be quite a bit (more or less 168%) more effective at anisotropic filtering than the GeForce GT 430 (OEM). (explain)

Radeon HD 4870 1GB		30000 Mtexels/sec
GeForce GT 430 (OEM)		11200 Mtexels/sec
	Difference: 18800 (168%)

Pixel Rate

The Radeon HD 4870 1GB is quite a bit (approximately 329%) more effective at AA than the GeForce GT 430 (OEM), and also able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 4870 1GB		12000 Mpixels/sec
GeForce GT 430 (OEM)		2800 Mpixels/sec
	Difference: 9200 (329%)

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 MB per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.