GeForce GTX 260 216SP 55 nm vs Radeon R9 M265X

Intro

Compare those specifications to the Radeon R9 M265X, which has a GPU core clock 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 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX 260 216SP 55 nm should be 55% quicker than the Radeon R9 M265X in general, because of its greater data rate. (explain)

GeForce GTX 260 216SP 55 nm		111888 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 39888 (55%)

Texel Rate

The GeForce GTX 260 216SP 55 nm will be much (about 80%) better at anisotropic filtering than the Radeon R9 M265X. (explain)

GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 18472 (80%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 260 216SP 55 nm is a better choice, by a large margin. (explain)

GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 6928 (75%)

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 max amount of information (counted in megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.