Radeon HD 5550 vs Radeon HD 6750 1GB

Intro

Compare all that to the Radeon HD 6750 1GB, which uses a 40 nm design. AMD has clocked the core speed at 725 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this particular model. It features 720 SPUs along with 36 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 6750 1GB will be 400% faster than the Radeon HD 5550 in general, due to its greater data rate. (explain)

Radeon HD 6750 1GB		64000 MB/sec
Radeon HD 5550		12800 MB/sec
	Difference: 51200 (400%)

Texel Rate

The Radeon HD 6750 1GB is much (about 197%) faster with regards to anisotropic filtering than the Radeon HD 5550. (explain)

Radeon HD 6750 1GB		26100 Mtexels/sec
Radeon HD 5550		8800 Mtexels/sec
	Difference: 17300 (197%)

Pixel Rate

The Radeon HD 6750 1GB will be much (more or less 164%) faster with regards to AA than the Radeon HD 5550, and will be capable of handling higher resolutions while still performing well. (explain)

Radeon HD 6750 1GB		11600 Mpixels/sec
Radeon HD 5550		4400 Mpixels/sec
	Difference: 7200 (164%)

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 (counted in MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video 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 most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. 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 fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.