Radeon HD 3470 512MB vs Radeon HD 6770

Intro

Compare those specifications to the Radeon HD 6770, which uses a 40 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 memory runs at a speed of 1050 MHz on this model. It features 800 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 6770 should theoretically be much superior to the Radeon HD 3470 512MB overall. (explain)

Radeon HD 6770		67200 MB/sec
Radeon HD 3470 512MB		30400 MB/sec
	Difference: 36800 (121%)

Texel Rate

The Radeon HD 6770 will be a lot (about 1025%) better at anisotropic filtering than the Radeon HD 3470 512MB. (explain)

Radeon HD 6770		36000 Mtexels/sec
Radeon HD 3470 512MB		3200 Mtexels/sec
	Difference: 32800 (1025%)

Pixel Rate

The Radeon HD 6770 is much (approximately 350%) faster with regards to anti-aliasing than the Radeon HD 3470 512MB, and capable of handling higher screen resolutions better. (explain)

Radeon HD 6770		14400 Mpixels/sec
Radeon HD 3470 512MB		3200 Mpixels/sec
	Difference: 11200 (350%)

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 information (in units of megabytes per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write 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 core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.