Radeon R9 M295X vs Radeon RX 580

Intro

Compare all of that to the Radeon RX 580, which comes with core clock speeds of 1257 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 memory. It features 2304 SPUs as well as 144 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
Radeon RX 580		185 Watts
	Difference: 60 Watts (48%)

Memory Bandwidth

In theory, the Radeon RX 580 should perform quite a bit faster than the Radeon R9 M295X in general. (explain)

Radeon RX 580		262144 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 86144 (49%)

Texel Rate

The Radeon RX 580 is quite a bit (approximately 89%) better at AF than the Radeon R9 M295X. (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 85008 (89%)

Pixel Rate

The Radeon RX 580 will be much (approximately 68%) more effective at AA than the Radeon R9 M295X, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon RX 580		40224 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 16224 (68%)

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 (measured in megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

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