GeForce GTX 480 vs Radeon R9 M265X

Intro

Compare that to the Radeon R9 M265X, which features a core clock frequency of 575 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 480 will be 146% faster than the Radeon R9 M265X in general, due to its higher bandwidth. (explain)

GeForce GTX 480		177408 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 105408 (146%)

Texel Rate

The GeForce GTX 480 will be much (more or less 83%) more effective at texture filtering than the Radeon R9 M265X. (explain)

GeForce GTX 480		42000 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 19000 (83%)

Pixel Rate

The GeForce GTX 480 will be much (more or less 265%) faster with regards to full screen anti-aliasing than the Radeon R9 M265X, and also will be capable of handling higher screen resolutions better. (explain)

GeForce GTX 480		33600 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 24400 (265%)

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 information (measured in megabytes per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, 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 number of pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of 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.