GeForce GTX 550 Ti vs Radeon R9 M385X

Intro

Compare that to the Radeon R9 M385X, which features a GPU core clock speed of 1100 MHz, and 4096 MB of GDDR5 RAM running at 1500 MHz through a 128-bit bus. It also is comprised of 896 SPUs, 56 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 550 Ti should theoretically perform a bit faster than the Radeon R9 M385X overall. (explain)

GeForce GTX 550 Ti		98496 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 2496 (3%)

Texel Rate

The Radeon R9 M385X will be quite a bit (more or less 114%) more effective at texture filtering than the GeForce GTX 550 Ti. (explain)

Radeon R9 M385X		61600 Mtexels/sec
GeForce GTX 550 Ti		28800 Mtexels/sec
	Difference: 32800 (114%)

Pixel Rate

The GeForce GTX 550 Ti will be quite a bit (more or less 23%) better at FSAA than the Radeon R9 M385X, and should be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 550 Ti		21600 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 4000 (23%)

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 past the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per 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 figure is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.