Radeon HD 3470 256MB vs Radeon HD 3650

Intro

Compare all that to the Radeon HD 3650, which has GPU core speed of 725 MHz, and 1024 MB of GDDR4 memory running at 800 MHz through a 128-bit bus. It also is comprised of 120(24x5) Stream Processors, 8 Texture Address Units, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 3470 256MB should theoretically perform a little 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 should be a lot (approximately 81%) better at AF 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 will be a little bit (approximately 10%) faster with regards to FSAA than the Radeon HD 3650, and also will be capable of handling higher resolutions while still performing well. (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 maximum amount of information (in units of MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 processed 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 better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.