GeForce GTX 260 216SP 55 nm vs Radeon R9 M380

Intro

Compare those specs to the Radeon R9 M380, which has GPU core speed of 1000 MHz, and 4096 MB of GDDR5 RAM set to run at 1500 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GTX 260 216SP 55 nm should in theory be a little bit better than the Radeon R9 M380 overall. (explain)

GeForce GTX 260 216SP 55 nm		111888 MB/sec
Radeon R9 M380		96000 MB/sec
	Difference: 15888 (17%)

Texel Rate

The GeForce GTX 260 216SP 55 nm should be a small bit (more or less 4%) faster with regards to anisotropic filtering than the Radeon R9 M380. (explain)

GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
Radeon R9 M380		40000 Mtexels/sec
	Difference: 1472 (4%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 260 216SP 55 nm is the winner, though not by far. (explain)

GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
Radeon R9 M380		16000 Mpixels/sec
	Difference: 128 (1%)

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 largest amount of data (counted in MB per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.