GeForce GTX 460 1GB vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which has a core clock speed of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTX 460 1GB		160 Watts
	Difference: 35 Watts (28%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M390X should theoretically be much better than the GeForce GTX 460 1GB overall. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 460 1GB		115200 MB/sec
	Difference: 44800 (39%)

Texel Rate

The Radeon R9 M390X should be much (more or less 145%) faster with regards to texture filtering than the GeForce GTX 460 1GB. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 460 1GB		37800 Mtexels/sec
	Difference: 54744 (145%)

Pixel Rate

The Radeon R9 M390X should be just a bit (approximately 7%) more effective at full screen anti-aliasing than the GeForce GTX 460 1GB, and will be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GTX 460 1GB		21600 Mpixels/sec
	Difference: 1536 (7%)

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 maximum amount of data (in units of megabytes per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.