Radeon HD 5670 vs Radeon R9 M270X

Intro

Compare those specifications to the Radeon R9 M270X, which makes use of a 28 nm design. AMD has set the core speed at 725 MHz. The GDDR5 memory is set to run at a speed of 1125 MHz on this particular card. It features 640 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R9 M270X should theoretically be a little bit better than the Radeon HD 5670 in general. (explain)

Radeon R9 M270X		72000 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 8000 (13%)

Texel Rate

The Radeon R9 M270X should be quite a bit (approximately 87%) better at anisotropic filtering than the Radeon HD 5670. (explain)

Radeon R9 M270X		29000 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 13500 (87%)

Pixel Rate

The Radeon R9 M270X should be much (more or less 87%) more effective at anti-aliasing than the Radeon HD 5670, and should be able to handle higher resolutions while still performing well. (explain)

Radeon R9 M270X		11600 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 5400 (87%)

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 (measured in megabytes per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, 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 anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one 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 worked out by multiplying the number of colour ROPs 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 rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.