Radeon HD 3650 512MB vs Radeon HD 5830

Intro

Compare all that to the Radeon HD 5830, which makes use of a 40 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 RAM works at a speed of 1000 MHz on this specific model. It features 1120(224x5) SPUs along with 56 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 512MB		78 Watts
Radeon HD 5830		175 Watts
	Difference: 97 Watts (124%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5830 should be 400% quicker than the Radeon HD 3650 512MB overall, because of its higher bandwidth. (explain)

Radeon HD 5830		128000 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 102400 (400%)

Texel Rate

The Radeon HD 5830 will be much (more or less 672%) better at AF than the Radeon HD 3650 512MB. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 39000 (672%)

Pixel Rate

The Radeon HD 5830 will be a lot (approximately 341%) better at AA than the Radeon HD 3650 512MB, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 5830		12800 Mpixels/sec
Radeon HD 3650 512MB		2900 Mpixels/sec
	Difference: 9900 (341%)

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 data (in units of MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends 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.