Geforce GTX 690 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 RAM is set to run at a speed of 1375 MHz on this model. It features 2048 SPUs as well as 128 TAUs 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

The Geforce GTX 690 should in theory be much faster than the Radeon R9 M295X overall. (explain)

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

Texel Rate

The Geforce GTX 690 will be quite a bit (about 144%) more effective at texture filtering 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 should be quite a bit (more or less 144%) faster with regards to anti-aliasing than the Radeon R9 M295X, and also will be capable of handling higher resolutions better. (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 maximum amount of data (in units of megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.