GeForce GTX 260 Core 216 vs Radeon R9 390X 8G

Intro

Compare those specifications to the Radeon R9 390X 8G, which has core clock speeds of 1050 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 memory. It features 2816 SPUs along with 176 Texture Address Units and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 260 Core 216		202 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 73 Watts (36%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G should perform quite a bit faster than the GeForce GTX 260 Core 216 overall. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce GTX 260 Core 216		111888 MB/sec
	Difference: 272112 (243%)

Texel Rate

The Radeon R9 390X 8G should be a lot (approximately 346%) better at anisotropic filtering than the GeForce GTX 260 Core 216. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce GTX 260 Core 216		41472 Mtexels/sec
	Difference: 143328 (346%)

Pixel Rate

The Radeon R9 390X 8G should be quite a bit (more or less 317%) better at FSAA than the GeForce GTX 260 Core 216, and also should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce GTX 260 Core 216		16128 Mpixels/sec
	Difference: 51072 (317%)

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 MB per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.