GeForce GTX Titan Black vs Radeon R7 250X 2GB

Intro

Compare those specs to the Radeon R7 250X 2GB, which features a clock speed of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB		95 Watts
GeForce GTX Titan Black		250 Watts
	Difference: 155 Watts (163%)

Memory Bandwidth

In theory, the GeForce GTX Titan Black should be 367% faster than the Radeon R7 250X 2GB overall, because of its higher bandwidth. (explain)

GeForce GTX Titan Black		336000 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 264000 (367%)

Texel Rate

The GeForce GTX Titan Black will be a lot (more or less 433%) faster with regards to texture filtering than the Radeon R7 250X 2GB. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 173360 (433%)

Pixel Rate

The GeForce GTX Titan Black will be a lot (about 167%) better at AA than the Radeon R7 250X 2GB, and should be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 26672 (167%)

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 largest amount of information (in units of MB per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling 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 record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated 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 filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.