GeForce GTX 280 vs Radeon R9 M390X

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTX 280		236 Watts
	Difference: 111 Watts (89%)

Memory Bandwidth

Performance-wise, the Radeon R9 M390X should theoretically be just a bit superior to the GeForce GTX 280 overall. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 280		141696 MB/sec
	Difference: 18304 (13%)

Texel Rate

The Radeon R9 M390X is a lot (about 92%) better at AF than the GeForce GTX 280. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 280		48160 Mtexels/sec
	Difference: 44384 (92%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M390X is superior to the GeForce GTX 280, though not by far. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GTX 280		19264 Mpixels/sec
	Difference: 3872 (20%)

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 data (in units of MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The better 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 amount of pixels that the graphics chip can 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 clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.