GeForce GTX 650 Ti 2GB vs Radeon R9 270

Intro

Compare that to the Radeon R9 270, which makes use of a 28 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 memory runs at a speed of 1400 MHz on this particular model. It features 1280 SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 2GB		110 Watts
Radeon R9 270		150 Watts
	Difference: 40 Watts (36%)

Memory Bandwidth

In theory, the Radeon R9 270 is 107% quicker than the GeForce GTX 650 Ti 2GB overall, due to its greater bandwidth. (explain)

Radeon R9 270		179200 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 92800 (107%)

Texel Rate

The Radeon R9 270 will be much (more or less 21%) faster with regards to anisotropic filtering than the GeForce GTX 650 Ti 2GB. (explain)

Radeon R9 270		72000 Mtexels/sec
GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
	Difference: 12608 (21%)

Pixel Rate

The Radeon R9 270 will be much (more or less 94%) better at AA than the GeForce GTX 650 Ti 2GB, and should be capable of handling higher screen resolutions better. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 13952 (94%)

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 maximum amount of information (in units of MB per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen 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 amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 most pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.