GeForce GTX 285 2GB vs Radeon R9 M265X

Intro

Compare all that to the Radeon R9 M265X, which has core 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

In theory, the GeForce GTX 285 2GB should be 121% faster than the Radeon R9 M265X in general, due to its greater data rate. (explain)

GeForce GTX 285 2GB		158976 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 86976 (121%)

Texel Rate

The GeForce GTX 285 2GB is much (approximately 125%) more effective at anisotropic filtering than the Radeon R9 M265X. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 28840 (125%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 285 2GB is the winner, by a large margin. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 11536 (125%)

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 MB per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.