Radeon HD 4850 1GB vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which comes with clock speeds of 750 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 1GB		110 Watts
Radeon R9 M295X		125 Watts
	Difference: 15 Watts (14%)

Memory Bandwidth

The Radeon R9 M295X, in theory, should be a lot faster than the Radeon HD 4850 1GB in general. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon HD 4850 1GB		63552 MB/sec
	Difference: 112448 (177%)

Texel Rate

The Radeon R9 M295X will be quite a bit (more or less 284%) more effective at anisotropic filtering than the Radeon HD 4850 1GB. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon HD 4850 1GB		25000 Mtexels/sec
	Difference: 71000 (284%)

Pixel Rate

The Radeon R9 M295X is much (approximately 140%) more effective at AA than the Radeon HD 4850 1GB, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 M295X		24000 Mpixels/sec
Radeon HD 4850 1GB		10000 Mpixels/sec
	Difference: 14000 (140%)

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 max amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 can be applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics 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 maximum number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. 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 get to the maximum fill rate.