Radeon HD 4850 X2 1GB vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which comes with a clock frequency of 750 MHz and a GDDR5 memory frequency of 1375 MHz. It also uses a 256-bit memory bus, and uses a 28 nm design. It features 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 4850 X2 1GB		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M295X should in theory be quite a bit superior to the Radeon HD 4850 X2 1GB overall. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon HD 4850 X2 1GB		127104 MB/sec
	Difference: 48896 (38%)

Texel Rate

The Radeon R9 M295X is a lot (more or less 92%) faster with regards to texture filtering than the Radeon HD 4850 X2 1GB. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon HD 4850 X2 1GB		50000 Mtexels/sec
	Difference: 46000 (92%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 M295X is the winner, but it probably won't make a huge difference. (explain)

Radeon R9 M295X		24000 Mpixels/sec
Radeon HD 4850 X2 1GB		20000 Mpixels/sec
	Difference: 4000 (20%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of information (measured in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 processed in one second. This is worked out by multiplying the total amount of 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 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 the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units 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 fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.