Radeon HD 5750 1GB vs Radeon R9 270

Intro

Compare those specifications to the Radeon R9 270, which features clock speeds of 900 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs along with 80 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB		86 Watts
Radeon R9 270		150 Watts
	Difference: 64 Watts (74%)

Memory Bandwidth

Theoretically, the Radeon R9 270 should be quite a bit faster than the Radeon HD 5750 1GB overall. (explain)

Radeon R9 270		179200 MB/sec
Radeon HD 5750 1GB		73600 MB/sec
	Difference: 105600 (143%)

Texel Rate

The Radeon R9 270 is a lot (approximately 186%) faster with regards to AF than the Radeon HD 5750 1GB. (explain)

Radeon R9 270		72000 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 46800 (186%)

Pixel Rate

The Radeon R9 270 should be quite a bit (more or less 157%) better at anti-aliasing than the Radeon HD 5750 1GB, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 270		28800 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 17600 (157%)

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 largest amount of information (in units of megabytes per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units by the core 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.