Radeon R9 390 8G vs Radeon R9 M280X

Intro

Compare all of that to the Radeon R9 M280X, which makes use of a 28 nm design. AMD has set the core speed at 900 MHz. The GDDR5 memory runs at a speed of 1375 MHz on this specific card. It features 896 SPUs along with 56 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
Radeon R9 390 8G		275 Watts
	Difference: 200 Watts (267%)

Memory Bandwidth

The Radeon R9 390 8G should theoretically perform much faster than the Radeon R9 M280X in general. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 296000 (336%)

Texel Rate

The Radeon R9 390 8G is quite a bit (approximately 217%) more effective at anisotropic filtering than the Radeon R9 M280X. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 109600 (217%)

Pixel Rate

The Radeon R9 390 8G should be a lot (about 344%) more effective at full screen anti-aliasing than the Radeon R9 M280X, and capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 49600 (344%)

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 maximum amount of data (counted in 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 clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.