GeForce GTX 275 vs Radeon R7 250X

Intro

Compare those specs to the Radeon R7 250X, which uses a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 RAM works at a speed of 1125 MHz on this model. 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		95 Watts
GeForce GTX 275		219 Watts
	Difference: 124 Watts (131%)

Memory Bandwidth

In theory, the GeForce GTX 275 should be 76% quicker than the Radeon R7 250X overall, because of its greater data rate. (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%) better at texture 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 anti-aliasing than the Radeon R7 250X, and will be able to handle higher screen resolutions while still performing well. (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 max amount of data (counted in MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, the result 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be 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 this number, the better the video 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 write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.