GeForce GTX 275 vs Radeon R9 270X

Intro

Compare those specifications to the Radeon R9 270X, which makes use of a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 RAM runs at a speed of 1400 MHz on this model. It features 1280 SPUs as well as 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

In theory, the Radeon R9 270X should perform much faster than 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 will be much (more or less 58%) more effective 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

If running with lots of anti-aliasing is important to you, then the Radeon R9 270X is superior to the GeForce GTX 275, by far. (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 information (counted in megabytes per second) that can be transferred over 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 type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better 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 most pixels that the graphics chip could 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 ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.