GeForce GTX 275 vs Radeon R7 250X

Intro

Compare all that to the Radeon R7 250X, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 memory is set to run at a frequency of 1125 MHz on this specific card. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X		95 Watts
GeForce GTX 275		219 Watts
	Difference: 124 Watts (131%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 275 should in theory be quite a bit better than the Radeon R7 250X overall. (explain)

GeForce GTX 275		127008 MB/sec
Radeon R7 250X		72000 MB/sec
	Difference: 55008 (76%)

Texel Rate

The GeForce GTX 275 is a lot (approximately 27%) more effective at anisotropic filtering than the Radeon R7 250X. (explain)

GeForce GTX 275		50640 Mtexels/sec
Radeon R7 250X		40000 Mtexels/sec
	Difference: 10640 (27%)

Pixel Rate

The GeForce GTX 275 is just a bit (approximately 11%) better at FSAA than the Radeon R7 250X, and also should be able to handle higher resolutions more effectively. (explain)

GeForce GTX 275		17724 Mpixels/sec
Radeon R7 250X		16000 Mpixels/sec
	Difference: 1724 (11%)

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: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 are processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at 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 video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.