Radeon HD 3470 256MB vs Radeon HD 7750

Intro

Compare those specs to the Radeon HD 7750, which has a core clock speed of 800 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It is comprised of 512 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 7750, in theory, should perform a lot faster than the Radeon HD 3470 256MB overall. (explain)

Radeon HD 7750		72000 MB/sec
Radeon HD 3470 256MB		30400 MB/sec
	Difference: 41600 (137%)

Texel Rate

The Radeon HD 7750 is a lot (approximately 700%) more effective at texture filtering than the Radeon HD 3470 256MB. (explain)

Radeon HD 7750		25600 Mtexels/sec
Radeon HD 3470 256MB		3200 Mtexels/sec
	Difference: 22400 (700%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7750 is a better choice, by far. (explain)

Radeon HD 7750		12800 Mpixels/sec
Radeon HD 3470 256MB		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: Bandwidth is the maximum amount of information (counted in MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better 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 amount of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.