Radeon HD 7790 vs Radeon R9 M280X

Intro

Compare that to the Radeon R9 M280X, which comes with a core clock speed of 900 MHz and a GDDR5 memory speed of 1375 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It 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 just a bit (about 11%) better at anisotropic 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 using a high resolution is important to you, then the Radeon HD 7790 is a better choice, but 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: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.