Geforce GTX 690 vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which uses a 28 nm design. AMD has clocked the core speed at 750 MHz. The GDDR5 RAM 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 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
Geforce GTX 690		300 Watts
	Difference: 175 Watts (140%)

Memory Bandwidth

In theory, the Geforce GTX 690 will be 118% quicker than the Radeon R9 M295X overall, due to its greater data rate. (explain)

Geforce GTX 690		384512 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 208512 (118%)

Texel Rate

The Geforce GTX 690 is much (about 144%) more effective at AF than the Radeon R9 M295X. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 138240 (144%)

Pixel Rate

The Geforce GTX 690 is a lot (more or less 144%) more effective at AA than the Radeon R9 M295X, and should be able to handle higher resolutions while still performing well. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 34560 (144%)

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 data (measured in MB per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. 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 number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.