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

Intro

Compare all of that to the Radeon R9 390X 8G, which has a core clock frequency of 1050 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 512-bit bus, and makes use of a 28 nm design. It is comprised of 2816 SPUs, 176 TAUs, and 64 Raster Operation Units.

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

In theory, the Radeon R9 390X 8G should perform quite a bit faster than the GeForce GTX 460 (OEM) overall. (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 should be quite a bit (approximately 408%) more effective 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 quite a bit (more or less 223%) better at AA than the GeForce GTX 460 (OEM), and should be capable of handling higher screen resolutions without losing too much performance. (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 max amount of information (counted in MB per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This 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 applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.