Geforce GTX 690 vs Radeon R7 250X 2GB

Intro

Compare all of that to the Radeon R7 250X 2GB, which makes use of a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 memory works at a frequency of 1125 MHz on this model. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB		95 Watts
Geforce GTX 690		300 Watts
	Difference: 205 Watts (216%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 690 should be quite a bit faster than the Radeon R7 250X 2GB in general. (explain)

Geforce GTX 690		384512 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 312512 (434%)

Texel Rate

The Geforce GTX 690 will be a lot (more or less 486%) more effective at texture filtering than the Radeon R7 250X 2GB. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 194240 (486%)

Pixel Rate

The Geforce GTX 690 will be quite a bit (about 266%) better at full screen anti-aliasing than the Radeon R7 250X 2GB, and also should be capable of handling higher resolutions better. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 42560 (266%)

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 max amount of data (measured in megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units 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 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. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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 potential to get to the maximum fill rate.