GeForce GTX 275 vs Radeon RX 480

Intro

Compare those specifications to the Radeon RX 480, which has core clock speeds of 1120 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 memory. It features 2304 SPUs along with 144 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480		150 Watts
GeForce GTX 275		219 Watts
	Difference: 69 Watts (46%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 480 should be 106% quicker than the GeForce GTX 275 overall, because of its greater bandwidth. (explain)

Radeon RX 480		262144 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 135136 (106%)

Texel Rate

The Radeon RX 480 is quite a bit (about 218%) faster with regards to AF than the GeForce GTX 275. (explain)

Radeon RX 480		161280 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 110640 (218%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 480 is a better choice, and very much so. (explain)

Radeon RX 480		35840 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 18116 (102%)

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 largest amount of data (in units of MB per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the 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 can possibly record to the local memory in a 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 - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.