GeForce GT 430 1GB vs Radeon HD 4650 512MB

Intro

Compare those specs to the Radeon HD 4650 512MB, which features core speeds of 600 MHz on the GPU, and 500 MHz on the 512 MB of DDR2 RAM. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 512MB		55 Watts
GeForce GT 430 1GB		60 Watts
	Difference: 5 Watts (9%)

Memory Bandwidth

Theoretically, the GeForce GT 430 1GB should be quite a bit faster than the Radeon HD 4650 512MB overall. (explain)

GeForce GT 430 1GB		28800 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 12800 (80%)

Texel Rate

The Radeon HD 4650 512MB will be a lot (about 71%) faster with regards to anisotropic filtering than the GeForce GT 430 1GB. (explain)

Radeon HD 4650 512MB		19200 Mtexels/sec
GeForce GT 430 1GB		11200 Mtexels/sec
	Difference: 8000 (71%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 4650 512MB is the winner, by a large margin. (explain)

Radeon HD 4650 512MB		4800 Mpixels/sec
GeForce GT 430 1GB		2800 Mpixels/sec
	Difference: 2000 (71%)

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 (counted in MB per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 are processed per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many 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.