Radeon HD 3470 512MB vs Radeon HD 7750

Intro

Compare all of that to the Radeon HD 7750, which makes use of a 28 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 memory works at a speed of 1125 MHz on this specific card. It features 512 SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 7750 should perform a lot faster than the Radeon HD 3470 512MB overall. (explain)

Radeon HD 7750		72000 MB/sec
Radeon HD 3470 512MB		30400 MB/sec
	Difference: 41600 (137%)

Texel Rate

The Radeon HD 7750 will be much (approximately 700%) faster with regards to texture filtering than the Radeon HD 3470 512MB. (explain)

Radeon HD 7750		25600 Mtexels/sec
Radeon HD 3470 512MB		3200 Mtexels/sec
	Difference: 22400 (700%)

Pixel Rate

The Radeon HD 7750 is much (about 300%) faster with regards to AA than the Radeon HD 3470 512MB, and also able to handle higher resolutions more effectively. (explain)

Radeon HD 7750		12800 Mpixels/sec
Radeon HD 3470 512MB		3200 Mpixels/sec
	Difference: 9600 (300%)

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 MB per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, the result 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the 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 clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.