GeForce GTS 250 512MB vs Radeon R7 250X

Intro

Compare all of that to the Radeon R7 250X, which comes with core clock speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X		95 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 50 Watts (53%)

Memory Bandwidth

As far as performance goes, the Radeon R7 250X should theoretically be a small bit better than the GeForce GTS 250 512MB in general. (explain)

Radeon R7 250X		72000 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 1600 (2%)

Texel Rate

The GeForce GTS 250 512MB is a small bit (more or less 18%) faster with regards to texture filtering than the Radeon R7 250X. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
Radeon R7 250X		40000 Mtexels/sec
	Difference: 7232 (18%)

Pixel Rate

The Radeon R7 250X will be quite a bit (approximately 36%) better at AA than the GeForce GTS 250 512MB, and also will be able to handle higher resolutions while still performing well. (explain)

Radeon R7 250X		16000 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 4192 (36%)

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 data (measured in MB per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip 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 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 is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.