GeForce GT 430 1GB vs Radeon HD 4650 512MB

Intro

Compare all of that to the Radeon HD 4650 512MB, which has core speeds of 600 MHz on the GPU, and 500 MHz on the 512 MB of DDR2 memory. It features 320(64x5) SPUs as well as 32 TAUs 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

As far as performance goes, the GeForce GT 430 1GB should in theory be quite a bit superior to 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 is much (approximately 71%) better at 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

The Radeon HD 4650 512MB will be a lot (about 71%) more effective at anti-aliasing than the GeForce GT 430 1GB, and will be capable of handling higher resolutions without slowing down too much. (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 transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics 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 can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.