Radeon HD 3470 512MB vs Radeon HD 4670 512MB

Intro

Compare all that to the Radeon HD 4670 512MB, which features core 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 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 4670 512MB should in theory be a little bit superior to the Radeon HD 3470 512MB overall. (explain)

Radeon HD 4670 512MB		32000 MB/sec
Radeon HD 3470 512MB		30400 MB/sec
	Difference: 1600 (5%)

Texel Rate

The Radeon HD 4670 512MB should be a lot (approximately 650%) more effective at texture filtering than the Radeon HD 3470 512MB. (explain)

Radeon HD 4670 512MB		24000 Mtexels/sec
Radeon HD 3470 512MB		3200 Mtexels/sec
	Difference: 20800 (650%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 4670 512MB is a better choice, by far. (explain)

Radeon HD 4670 512MB		6000 Mpixels/sec
Radeon HD 3470 512MB		3200 Mpixels/sec
	Difference: 2800 (88%)

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 data (measured in MB per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 amount of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total amount of 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 in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.