GeForce GTX 460 SE vs Radeon R9 390 8G

Intro

Compare those specifications to the Radeon R9 390 8G, which has GPU core speed of 1000 MHz, and 8192 MB of GDDR5 memory set to run at 1500 MHz through a 512-bit bus. It also is comprised of 2560 Stream Processors, 160 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The Radeon R9 390 8G, in theory, should be much faster than the GeForce GTX 460 SE overall. (explain)

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

Texel Rate

The Radeon R9 390 8G should be quite a bit (about 413%) faster with regards to anisotropic filtering than the GeForce GTX 460 SE. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GTX 460 SE		31200 Mtexels/sec
	Difference: 128800 (413%)

Pixel Rate

The Radeon R9 390 8G will be quite a bit (more or less 208%) more effective at full screen anti-aliasing than the GeForce GTX 460 SE, and will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GTX 460 SE		20800 Mpixels/sec
	Difference: 43200 (208%)

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 maximum amount of data (counted in megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total 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 in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.