Radeon HD 5870 vs Radeon R9 M390X

Intro

Compare those specifications to the Radeon R9 M390X, which features core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
Radeon HD 5870		188 Watts
	Difference: 63 Watts (50%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X should be 4% faster than the Radeon HD 5870 in general, due to its higher data rate. (explain)

Radeon R9 M390X		160000 MB/sec
Radeon HD 5870		153600 MB/sec
	Difference: 6400 (4%)

Texel Rate

The Radeon R9 M390X should be much (about 36%) more effective at anisotropic filtering than the Radeon HD 5870. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon HD 5870		68000 Mtexels/sec
	Difference: 24544 (36%)

Pixel Rate

The Radeon HD 5870 is a small bit (more or less 18%) faster with regards to FSAA than the Radeon R9 M390X, and also will be capable of handling higher screen resolutions better. (explain)

Radeon HD 5870		27200 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 4064 (18%)

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 moved over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 texture map elements (texels) that are processed in one second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.