Radeon HD 5750 512MB vs Radeon R9 M275X

Intro

Compare those specs to the Radeon R9 M275X, which comes with GPU clock speed of 900 MHz, and 2048 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also is made up of 640 Stream Processors, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
Radeon HD 5750 512MB		86 Watts
	Difference: 36 Watts (72%)

Memory Bandwidth

In theory, the Radeon HD 5750 512MB is 2% faster than the Radeon R9 M275X overall, due to its greater data rate. (explain)

Radeon HD 5750 512MB		73600 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 1600 (2%)

Texel Rate

The Radeon R9 M275X should be quite a bit (about 43%) better at anisotropic filtering than the Radeon HD 5750 512MB. (explain)

Radeon R9 M275X		36000 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 10800 (43%)

Pixel Rate

The Radeon R9 M275X will be quite a bit (approximately 29%) better at full screen anti-aliasing than the Radeon HD 5750 512MB, and also capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 M275X		14400 Mpixels/sec
Radeon HD 5750 512MB		11200 Mpixels/sec
	Difference: 3200 (29%)

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 MB per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 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 number of texture map elements (texels) that are processed in one second. This figure is calculated 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels 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. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.