GeForce GTX 260 vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which uses a 28 nm design. AMD has set the core speed at 723 MHz. The GDDR5 memory runs at a speed of 1250 MHz on this specific card. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTX 260		182 Watts
	Difference: 57 Watts (46%)

Memory Bandwidth

The Radeon R9 M390X should in theory be much faster than the GeForce GTX 260 overall. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 260		111888 MB/sec
	Difference: 48112 (43%)

Texel Rate

The Radeon R9 M390X will be much (approximately 151%) faster with regards to anisotropic filtering than the GeForce GTX 260. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 260		36864 Mtexels/sec
	Difference: 55680 (151%)

Pixel Rate

The Radeon R9 M390X should be much (about 43%) faster with regards to full screen anti-aliasing than the GeForce GTX 260, and should be able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GTX 260		16128 Mpixels/sec
	Difference: 7008 (43%)

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 information (in units of megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a 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. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.