Radeon HD 5670 vs Radeon R9 270X

Intro

Compare all that to the Radeon R9 270X, which has clock speeds of 1000 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 5670		61 Watts
Radeon R9 270X		180 Watts
	Difference: 119 Watts (195%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270X is 180% faster than the Radeon HD 5670 overall, because of its higher bandwidth. (explain)

Radeon R9 270X		179200 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 115200 (180%)

Texel Rate

The Radeon R9 270X should be a lot (about 416%) better at texture filtering than the Radeon HD 5670. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 64500 (416%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 270X is a better choice, by a large margin. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 25800 (416%)

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 (in units of MB per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics 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 maximum amount of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.