GeForce GTX 295 vs Radeon R7 250X 2GB

Intro

Compare that to the Radeon R7 250X 2GB, which uses a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 RAM works at a speed of 1125 MHz on this particular card. 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 295		289 Watts
	Difference: 194 Watts (204%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 295 should be 211% faster than the Radeon R7 250X 2GB overall, because of its greater data rate. (explain)

GeForce GTX 295		223776 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 151776 (211%)

Texel Rate

The GeForce GTX 295 is a lot (more or less 130%) better at anisotropic filtering than the Radeon R7 250X 2GB. (explain)

GeForce GTX 295		92160 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 52160 (130%)

Pixel Rate

The GeForce GTX 295 is much (more or less 102%) faster with regards to anti-aliasing than the Radeon R7 250X 2GB, and also should be able to handle higher resolutions more effectively. (explain)

GeForce GTX 295		32256 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 16256 (102%)

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 information (in units of megabytes per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip 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 core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.