GeForce GTX Titan Black vs Radeon R9 M265X

Intro

Compare that to the Radeon R9 M265X, which features clock speeds of 575 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce GTX Titan Black should be a lot faster than the Radeon R9 M265X in general. (explain)

GeForce GTX Titan Black		336000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 264000 (367%)

Texel Rate

The GeForce GTX Titan Black is quite a bit (about 828%) more effective at anisotropic filtering than the Radeon R9 M265X. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 190360 (828%)

Pixel Rate

The GeForce GTX Titan Black is quite a bit (approximately 364%) better at AA than the Radeon R9 M265X, and also will be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 33472 (364%)

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 data (in units of megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. 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 memory bandwidth is, the lower the ability to get to the maximum fill rate.