GeForce GTX 550 Ti vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which features core clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 550 Ti		116 Watts
Radeon R9 M390X		125 Watts
	Difference: 9 Watts (8%)

Memory Bandwidth

The Radeon R9 M390X should in theory perform much faster than the GeForce GTX 550 Ti overall. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 550 Ti		98496 MB/sec
	Difference: 61504 (62%)

Texel Rate

The Radeon R9 M390X is much (about 221%) more effective at texture filtering than the GeForce GTX 550 Ti. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 550 Ti		28800 Mtexels/sec
	Difference: 63744 (221%)

Pixel Rate

The Radeon R9 M390X should be a small bit (about 7%) more effective at FSAA than the GeForce GTX 550 Ti, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GTX 550 Ti		21600 Mpixels/sec
	Difference: 1536 (7%)

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 (in units of MB per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.