Radeon HD 7750 vs Radeon R9 M280X

Intro

Compare those specifications to the Radeon R9 M280X, which features GPU clock speed of 900 MHz, and 4096 MB of GDDR5 RAM running at 1375 MHz through a 128-bit bus. It also is made up of 896 SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon R9 M280X		75 Watts
	Difference: 20 Watts (36%)

Memory Bandwidth

The Radeon R9 M280X, in theory, should perform quite a bit faster than the Radeon HD 7750 overall. (explain)

Radeon R9 M280X		88000 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 16000 (22%)

Texel Rate

The Radeon R9 M280X is a lot (about 97%) better at anisotropic filtering than the Radeon HD 7750. (explain)

Radeon R9 M280X		50400 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 24800 (97%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M280X is a better choice, but not by far. (explain)

Radeon R9 M280X		14400 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 1600 (13%)

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 max amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the 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 that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's 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 many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.