GeForce GTX 295 vs Radeon R9 390X 8G

Intro

Compare that to the Radeon R9 390X 8G, which comes with a clock frequency of 1050 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 512-bit memory bus, and makes use of a 28 nm design. It is made up of 2816 SPUs, 176 TAUs, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 390X 8G		275 Watts
GeForce GTX 295		289 Watts
	Difference: 14 Watts (5%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G is 72% quicker than the GeForce GTX 295 overall, due to its higher data rate. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce GTX 295		223776 MB/sec
	Difference: 160224 (72%)

Texel Rate

The Radeon R9 390X 8G should be quite a bit (about 101%) faster with regards to anisotropic filtering than the GeForce GTX 295. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce GTX 295		92160 Mtexels/sec
	Difference: 92640 (101%)

Pixel Rate

The Radeon R9 390X 8G is a lot (more or less 108%) better at full screen anti-aliasing than the GeForce GTX 295, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce GTX 295		32256 Mpixels/sec
	Difference: 34944 (108%)

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 (in units of MB per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, 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 amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.