GeForce GTX 460 2GB vs Radeon R9 390 8G

Intro

Compare those specifications to the Radeon R9 390 8G, which features a clock frequency of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 512-bit memory bus, and uses a 28 nm design. It features 2560 SPUs, 160 TAUs, and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 2GB		160 Watts
Radeon R9 390 8G		275 Watts
	Difference: 115 Watts (72%)

Memory Bandwidth

The Radeon R9 390 8G, in theory, should be a lot faster than the GeForce GTX 460 2GB overall. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GTX 460 2GB		115200 MB/sec
	Difference: 268800 (233%)

Texel Rate

The Radeon R9 390 8G is much (approximately 323%) more effective at anisotropic filtering than the GeForce GTX 460 2GB. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GTX 460 2GB		37800 Mtexels/sec
	Difference: 122200 (323%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 390 8G is the winner, by far. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GTX 460 2GB		21600 Mpixels/sec
	Difference: 42400 (196%)

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 in one second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units 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 fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.