GeForce GTX 260 Core 216 vs Radeon R9 M380

Intro

Compare all of that to the Radeon R9 M380, which has GPU clock speed of 1000 MHz, and 4096 MB of GDDR5 memory set to run at 1500 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 17% quicker than the Radeon R9 M380 in general, due to its higher data rate. (explain)

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

Texel Rate

The GeForce GTX 260 Core 216 should be a little bit (approximately 4%) better at AF than the Radeon R9 M380. (explain)

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

Pixel Rate

The GeForce GTX 260 Core 216 is a little bit (about 1%) faster with regards to FSAA than the Radeon R9 M380, and should be able to handle higher resolutions better. (explain)

GeForce GTX 260 Core 216		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 (measured in MB per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.