Radeon HD 3470 256MB vs Radeon HD 3650

Intro

Compare those specs to the Radeon HD 3650, which has GPU core speed of 725 MHz, and 1024 MB of GDDR4 RAM set to run at 800 MHz through a 128-bit bus. It also features 120(24x5) SPUs, 8 Texture Address Units, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 3470 256MB should be a small bit faster than the Radeon HD 3650 overall. (explain)

Radeon HD 3470 256MB		30400 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 4800 (19%)

Texel Rate

The Radeon HD 3650 is much (approximately 81%) faster with regards to texture filtering than the Radeon HD 3470 256MB. (explain)

Radeon HD 3650		5800 Mtexels/sec
Radeon HD 3470 256MB		3200 Mtexels/sec
	Difference: 2600 (81%)

Pixel Rate

The Radeon HD 3470 256MB is just a bit (about 10%) more effective at AA than the Radeon HD 3650, and will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 3470 256MB		3200 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 300 (10%)

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 largest amount of information (counted in megabytes per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video 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 most pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.