Radeon HD 5770 vs Radeon R9 M270X

Intro

Compare those specifications to the Radeon R9 M270X, which comes with core clock speeds of 725 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 5770 should in theory be a little bit superior to the Radeon R9 M270X in general. (explain)

Radeon HD 5770		76800 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 4800 (7%)

Texel Rate

The Radeon HD 5770 should be a small bit (approximately 17%) better at anisotropic filtering than the Radeon R9 M270X. (explain)

Radeon HD 5770		34000 Mtexels/sec
Radeon R9 M270X		29000 Mtexels/sec
	Difference: 5000 (17%)

Pixel Rate

The Radeon HD 5770 will be a little bit (approximately 17%) more effective at anti-aliasing than the Radeon R9 M270X, and also should be able to handle higher resolutions better. (explain)

Radeon HD 5770		13600 Mpixels/sec
Radeon R9 M270X		11600 Mpixels/sec
	Difference: 2000 (17%)

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 information (counted in megabytes per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units of the card 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. 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 is also dependant 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 max fill rate.