Radeon HD 3650 vs Radeon HD 6970

Intro

Compare those specifications to the Radeon HD 6970, which comes with a clock frequency of 880 MHz and a GDDR5 memory frequency of 1375 MHz. It also features a 256-bit bus, and uses a 40 nm design. It features 1536 SPUs, 96 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650		78 Watts
Radeon HD 6970		250 Watts
	Difference: 172 Watts (221%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6970 should be quite a bit faster than the Radeon HD 3650 in general. (explain)

Radeon HD 6970		176000 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 150400 (588%)

Texel Rate

The Radeon HD 6970 is quite a bit (more or less 1357%) better at anisotropic filtering than the Radeon HD 3650. (explain)

Radeon HD 6970		84480 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 78680 (1357%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6970 is a better choice, by far. (explain)

Radeon HD 6970		28160 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 25260 (871%)

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 (counted in MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card by the core 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write 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 - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.