GeForce GTX 275 vs Radeon R9 270X

Intro

Compare that to the Radeon R9 270X, which has core speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 memory. 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

The Radeon R9 270X should in theory be quite a bit 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 is much (more or less 58%) more effective at texture filtering 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 (about 81%) more effective at full screen anti-aliasing than the GeForce GTX 275, and also capable of handling higher resolutions without losing too much performance. (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 max amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total number of 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.