Radeon HD 3650 512MB vs Radeon HD 6750

Intro

Compare those specifications to the Radeon HD 6750, which features a clock frequency of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It features 720 SPUs, 36 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 6750		86 Watts
	Difference: 8 Watts (10%)

Memory Bandwidth

In theory, the Radeon HD 6750 should be much faster than the Radeon HD 3650 512MB overall. (explain)

Radeon HD 6750		64000 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 38400 (150%)

Texel Rate

The Radeon HD 6750 is much (more or less 350%) more effective at AF than the Radeon HD 3650 512MB. (explain)

Radeon HD 6750		26100 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 20300 (350%)

Pixel Rate

The Radeon HD 6750 will be a lot (more or less 300%) more effective at full screen anti-aliasing than the Radeon HD 3650 512MB, and should be capable of handling higher resolutions better. (explain)

Radeon HD 6750		11600 Mpixels/sec
Radeon HD 3650 512MB		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 maximum amount of information (measured in MB per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.