GeForce GTX 275 vs Radeon R9 270X

Intro

Compare that to the Radeon R9 270X, which comes with clock speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs along with 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270X		180 Watts
GeForce GTX 275		219 Watts
	Difference: 39 Watts (22%)

Memory Bandwidth

Performance-wise, the Radeon R9 270X should theoretically be much superior to the GeForce GTX 275 in general. (explain)

Radeon R9 270X		179200 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 52192 (41%)

Texel Rate

The Radeon R9 270X is a lot (approximately 58%) better at AF than the GeForce GTX 275. (explain)

Radeon R9 270X		80000 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 29360 (58%)

Pixel Rate

The Radeon R9 270X is much (approximately 81%) faster with regards to AA than the GeForce GTX 275, and also should be able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 270X		32000 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 14276 (81%)

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 data (counted in megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 are processed in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the graphics 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 maximum amount of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.