GeForce GTX 590 vs Radeon R9 M380

Intro

Compare all that to the Radeon R9 M380, which has a clock speed of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 128-bit bus, and uses a 28 nm design. It is comprised of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 590 should in theory perform much faster than the Radeon R9 M380 overall. (explain)

GeForce GTX 590		328320 MB/sec
Radeon R9 M380		96000 MB/sec
	Difference: 232320 (242%)

Texel Rate

The GeForce GTX 590 is much (about 94%) faster with regards to texture filtering than the Radeon R9 M380. (explain)

GeForce GTX 590		77696 Mtexels/sec
Radeon R9 M380		40000 Mtexels/sec
	Difference: 37696 (94%)

Pixel Rate

The GeForce GTX 590 should be a lot (about 264%) faster with regards to FSAA than the Radeon R9 M380, and also should be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 590		58272 Mpixels/sec
Radeon R9 M380		16000 Mpixels/sec
	Difference: 42272 (264%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range 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 figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour 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 rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.