GeForce GT 430 vs Radeon HD 4650 512MB

Intro

Compare those specs to the Radeon HD 4650 512MB, which features clock speeds of 600 MHz on the GPU, and 500 MHz on the 512 MB of DDR2 memory. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the GeForce GT 430 should be 80% faster than the Radeon HD 4650 512MB overall, due to its higher bandwidth. (explain)

GeForce GT 430		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. (explain)

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

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4650 512MB is a better choice, and very much so. (explain)

Radeon HD 4650 512MB		4800 Mpixels/sec
GeForce GT 430		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 max amount of information (measured in MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the card will be at 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 the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units 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 fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.