Radeon HD 5870 vs Radeon R9 M295X

Intro

Compare those specifications to the Radeon R9 M295X, which has core speeds of 750 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
Radeon HD 5870		188 Watts
	Difference: 63 Watts (50%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M295X should theoretically be a small bit superior to the Radeon HD 5870 overall. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon HD 5870		153600 MB/sec
	Difference: 22400 (15%)

Texel Rate

The Radeon R9 M295X should be quite a bit (approximately 41%) faster with regards to AF than the Radeon HD 5870. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon HD 5870		68000 Mtexels/sec
	Difference: 28000 (41%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 5870 is the winner, but only just. (explain)

Radeon HD 5870		27200 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 3200 (13%)

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 MB per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.