Radeon HD 3650 vs Radeon HD 6750 1GB

Intro

Compare those specs to the Radeon HD 6750 1GB, which features core speeds of 725 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 720 SPUs as well as 36 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650		78 Watts
Radeon HD 6750 1GB		86 Watts
	Difference: 8 Watts (10%)

Memory Bandwidth

In theory, the Radeon HD 6750 1GB will be 150% quicker than the Radeon HD 3650 overall, because of its higher bandwidth. (explain)

Radeon HD 6750 1GB		64000 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 38400 (150%)

Texel Rate

The Radeon HD 6750 1GB should be a lot (about 350%) more effective at texture filtering than the Radeon HD 3650. (explain)

Radeon HD 6750 1GB		26100 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 20300 (350%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 6750 1GB is superior to the Radeon HD 3650, by a large margin. (explain)

Radeon HD 6750 1GB		11600 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 8700 (300%)

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 max amount of data (counted in megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 processed in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.