Radeon HD 5870 vs Radeon R9 M295X

Intro

Compare that to the Radeon R9 M295X, which features a core clock frequency of 750 MHz and a GDDR5 memory frequency of 1375 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is comprised of 2048 SPUs, 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

Performance-wise, the Radeon R9 M295X should in theory be a bit better than 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 will be quite a bit (about 41%) better at texture filtering 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 a high resolution is important to you, then the Radeon HD 5870 is superior to the Radeon R9 M295X, though not by far. (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 maximum amount of data (measured in MB per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output 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 get to the maximum fill rate.