GeForce GTX 460 (OEM) vs Radeon R9 390X 8G

Intro

Compare all of that to the Radeon R9 390X 8G, which has GPU core speed of 1050 MHz, and 8192 MB of GDDR5 RAM set to run at 1500 MHz through a 512-bit bus. It also is comprised of 2816 SPUs, 176 Texture Address Units, and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 (OEM)		150 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 125 Watts (83%)

Memory Bandwidth

The Radeon R9 390X 8G, in theory, should be a lot faster than the GeForce GTX 460 (OEM) in general. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce GTX 460 (OEM)		108800 MB/sec
	Difference: 275200 (253%)

Texel Rate

The Radeon R9 390X 8G will be quite a bit (more or less 408%) better at anisotropic filtering than the GeForce GTX 460 (OEM). (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce GTX 460 (OEM)		36400 Mtexels/sec
	Difference: 148400 (408%)

Pixel Rate

The Radeon R9 390X 8G should be a lot (more or less 223%) more effective at full screen anti-aliasing than the GeForce GTX 460 (OEM), and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce GTX 460 (OEM)		20800 Mpixels/sec
	Difference: 46400 (223%)

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 (measured in megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses 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 high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.