Radeon HD 3470 512MB vs Radeon HD 4670 512MB

Intro

Compare all that to the Radeon HD 4670 512MB, which features GPU clock speed of 750 MHz, and 512 MB of GDDR4/GDDR3/DDR3/DDR2 memory running at 1000 MHz through a 128-bit bus. It also features 320(64x5) Stream Processors, 32 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4670 512MB should in theory perform a little bit faster than 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%) better at anisotropic 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

The Radeon HD 4670 512MB should be quite a bit (about 88%) faster with regards to AA than the Radeon HD 3470 512MB, and should be able to handle higher resolutions more effectively. (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 largest amount of data (counted in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.