Radeon HD 7850 vs Radeon R9 M295X

Intro

Compare those specs to the Radeon R9 M295X, which makes use of a 28 nm design. AMD has clocked the core speed at 750 MHz. The GDDR5 memory is set to run at a speed of 1375 MHz on this model. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
Radeon HD 7850		130 Watts
	Difference: 5 Watts (4%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M295X will be 15% faster than the Radeon HD 7850 overall, because of its higher bandwidth. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon HD 7850		153600 MB/sec
	Difference: 22400 (15%)

Texel Rate

The Radeon R9 M295X should be much (approximately 74%) better at anisotropic filtering than the Radeon HD 7850. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon HD 7850		55040 Mtexels/sec
	Difference: 40960 (74%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7850 is the winner, but not by far. (explain)

Radeon HD 7850		27520 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 3520 (15%)

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 (in units of MB per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.