GeForce GTS 150 vs Radeon R7 250X 2GB

Intro

Compare those specs to the Radeon R7 250X 2GB, which has core clock speeds of 1000 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs as well as 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 GTS 150		141 Watts
	Difference: 46 Watts (48%)

Memory Bandwidth

In theory, the Radeon R7 250X 2GB will be 125% faster than the GeForce GTS 150 in general, due to its higher bandwidth. (explain)

Radeon R7 250X 2GB		72000 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 40000 (125%)

Texel Rate

The GeForce GTS 150 will be a bit (approximately 18%) more effective at anisotropic filtering than the Radeon R7 250X 2GB. (explain)

GeForce GTS 150		47360 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 7360 (18%)

Pixel Rate

The Radeon R7 250X 2GB is much (approximately 35%) more effective at FSAA than the GeForce GTS 150, and will be able to handle higher screen resolutions while still performing well. (explain)

Radeon R7 250X 2GB		16000 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 4160 (35%)

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.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's 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 number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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