GeForce GTX 260 Core 216 vs Radeon R9 M265X

Intro

Compare those specs to the Radeon R9 M265X, which comes with GPU clock speed of 575 MHz, and 2048 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also features 640 SPUs, 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 Core 216 should be 55% faster than the Radeon R9 M265X in general, because of its higher data rate. (explain)

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

Texel Rate

The GeForce GTX 260 Core 216 is much (approximately 80%) more effective at anisotropic filtering than the Radeon R9 M265X. (explain)

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

Pixel Rate

The GeForce GTX 260 Core 216 will be much (more or less 75%) faster with regards to full screen anti-aliasing than the Radeon R9 M265X, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 260 Core 216		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 data (measured in MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.