GeForce GTX 480 vs Radeon R9 M390X

Intro

Compare that to the Radeon R9 M390X, which features GPU clock speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTX 480		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 480 should perform just a bit faster than the Radeon R9 M390X overall. (explain)

GeForce GTX 480		177408 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 17408 (11%)

Texel Rate

The Radeon R9 M390X should be much (approximately 120%) more effective at AF than the GeForce GTX 480. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 480		42000 Mtexels/sec
	Difference: 50544 (120%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 480 is a better choice, by far. (explain)

GeForce GTX 480		33600 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 10464 (45%)

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 max amount of information (counted in megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the 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 applied in one 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated 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 filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.