GeForce GT 430 1GB vs Radeon HD 4670 512MB

Intro

Compare those specs to the Radeon HD 4670 512MB, which comes with clock speeds of 750 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR4/GDDR3/DDR3/DDR2 memory. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 430 1GB		60 Watts
Radeon HD 4670 512MB		70 Watts
	Difference: 10 Watts (17%)

Memory Bandwidth

Theoretically, the Radeon HD 4670 512MB should perform just a bit faster than the GeForce GT 430 1GB overall. (explain)

Radeon HD 4670 512MB		32000 MB/sec
GeForce GT 430 1GB		28800 MB/sec
	Difference: 3200 (11%)

Texel Rate

The Radeon HD 4670 512MB should be quite a bit (approximately 114%) more effective at anisotropic filtering than the GeForce GT 430 1GB. (explain)

Radeon HD 4670 512MB		24000 Mtexels/sec
GeForce GT 430 1GB		11200 Mtexels/sec
	Difference: 12800 (114%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4670 512MB is superior to the GeForce GT 430 1GB, by a large margin. (explain)

Radeon HD 4670 512MB		6000 Mpixels/sec
GeForce GT 430 1GB		2800 Mpixels/sec
	Difference: 3200 (114%)

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: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 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, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs 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 rate is also dependant on lots of 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.