Radeon HD 7790 vs Radeon R9 M280X

Intro

Compare those specs to the Radeon R9 M280X, which has a GPU core clock speed of 900 MHz, and 4096 MB of GDDR5 RAM set to run at 1375 MHz through a 128-bit bus. It also features 896 SPUs, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
Radeon HD 7790		85 Watts
	Difference: 10 Watts (13%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7790 should perform a small bit faster than the Radeon R9 M280X overall. (explain)

Radeon HD 7790		96000 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 8000 (9%)

Texel Rate

The Radeon HD 7790 should be a bit (approximately 11%) better at texture filtering than the Radeon R9 M280X. (explain)

Radeon HD 7790		56000 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 5600 (11%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7790 is the winner, though not by far. (explain)

Radeon HD 7790		16000 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 1600 (11%)

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 data (measured in MB per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.