GeForce GTX 460 2GB vs Radeon R9 390X 8G

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G should be 233% quicker than the GeForce GTX 460 2GB in general, due to its higher bandwidth. (explain)

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

Texel Rate

The Radeon R9 390X 8G should be much (approximately 389%) faster with regards to texture filtering than the GeForce GTX 460 2GB. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce GTX 460 2GB		37800 Mtexels/sec
	Difference: 147000 (389%)

Pixel Rate

The Radeon R9 390X 8G will be much (approximately 211%) more effective at anti-aliasing than the GeForce GTX 460 2GB, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce GTX 460 2GB		21600 Mpixels/sec
	Difference: 45600 (211%)

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 max amount of data (in units of MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.