Radeon HD 3470 256MB vs Radeon HD 4670 1GB

Intro

Compare those specs to the Radeon HD 4670 1GB, which comes with GPU core speed of 750 MHz, and 1024 MB of GDDR4/GDDR3/DDR3/DDR2 RAM running at 1100 MHz through a 128-bit bus. It also is comprised of 320(64x5) Stream Processors, 32 TAUs, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4670 1GB, in theory, should perform a little bit faster than the Radeon HD 3470 256MB overall. (explain)

Radeon HD 4670 1GB		35200 MB/sec
Radeon HD 3470 256MB		30400 MB/sec
	Difference: 4800 (16%)

Texel Rate

The Radeon HD 4670 1GB should be much (about 650%) faster with regards to anisotropic filtering than the Radeon HD 3470 256MB. (explain)

Radeon HD 4670 1GB		24000 Mtexels/sec
Radeon HD 3470 256MB		3200 Mtexels/sec
	Difference: 20800 (650%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 4670 1GB is a better choice, by far. (explain)

Radeon HD 4670 1GB		6000 Mpixels/sec
Radeon HD 3470 256MB		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: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the 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 amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's 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 rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.