GeForce GTX 650 Ti vs Radeon R9 M280X

Intro

Compare those specs to the Radeon R9 M280X, which has core speeds of 900 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 RAM. It features 896 SPUs as well as 56 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
GeForce GTX 650 Ti		110 Watts
	Difference: 35 Watts (47%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M280X should in theory be a small bit superior to the GeForce GTX 650 Ti in general. (explain)

Radeon R9 M280X		88000 MB/sec
GeForce GTX 650 Ti		86400 MB/sec
	Difference: 1600 (2%)

Texel Rate

The GeForce GTX 650 Ti is a little bit (about 18%) faster with regards to anisotropic filtering than the Radeon R9 M280X. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 8992 (18%)

Pixel Rate

The GeForce GTX 650 Ti is a bit (about 3%) more effective at FSAA than the Radeon R9 M280X, and also should be capable of handling higher resolutions better. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 448 (3%)

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 (in units of MB per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at 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 write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units 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 lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.