Radeon HD 3470 512MB vs Radeon HD 6570 (OEM) 1GB

Intro

Compare those specifications to the Radeon HD 6570 (OEM) 1GB, which features GPU core speed of 650 MHz, and 1024 MB of GDDR3 memory set to run at 900 MHz through a 128-bit bus. It also features 480 SPUs, 24 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 3470 512MB should theoretically be a bit faster than the Radeon HD 6570 (OEM) 1GB overall. (explain)

Radeon HD 3470 512MB		30400 MB/sec
Radeon HD 6570 (OEM) 1GB		28800 MB/sec
	Difference: 1600 (6%)

Texel Rate

The Radeon HD 6570 (OEM) 1GB is a lot (approximately 388%) more effective at AF than the Radeon HD 3470 512MB. (explain)

Radeon HD 6570 (OEM) 1GB		15600 Mtexels/sec
Radeon HD 3470 512MB		3200 Mtexels/sec
	Difference: 12400 (388%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6570 (OEM) 1GB is the winner, by far. (explain)

Radeon HD 6570 (OEM) 1GB		5200 Mpixels/sec
Radeon HD 3470 512MB		3200 Mpixels/sec
	Difference: 2000 (63%)

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 data (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. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.