GeForce GTX 460 2GB vs Radeon R9 M265X

Intro

Compare those specs to the Radeon R9 M265X, which features GPU core speed of 575 MHz, and 2048 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also is made up of 640 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 460 2GB should theoretically be much faster than the Radeon R9 M265X overall. (explain)

GeForce GTX 460 2GB		115200 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 43200 (60%)

Texel Rate

The GeForce GTX 460 2GB will be much (more or less 64%) faster with regards to texture filtering than the Radeon R9 M265X. (explain)

GeForce GTX 460 2GB		37800 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 14800 (64%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 460 2GB is superior to the Radeon R9 M265X, and very much so. (explain)

GeForce GTX 460 2GB		21600 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 12400 (135%)

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 information (measured in megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high 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 texture units of the card by the core speed of the chip. The better this number, the better the video 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 the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.