Radeon HD 5750 512MB vs Radeon R9 M265X

Intro

Compare all that to the Radeon R9 M265X, which features a clock frequency of 575 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit bus, and uses a 28 nm design. It features 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 5750 512MB should in theory perform a little bit faster than the Radeon R9 M265X overall. (explain)

Radeon HD 5750 512MB		73600 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 1600 (2%)

Texel Rate

The Radeon HD 5750 512MB will be a small bit (about 10%) faster with regards to AF than the Radeon R9 M265X. (explain)

Radeon HD 5750 512MB		25200 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 2200 (10%)

Pixel Rate

The Radeon HD 5750 512MB will be a lot (about 22%) faster with regards to anti-aliasing than the Radeon R9 M265X, and also should be able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 5750 512MB		11200 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 2000 (22%)

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 (counted in megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka 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 potential to get to the maximum fill rate.