GeForce 9800 GTX vs Radeon R9 M380

Intro

Compare those specifications to the Radeon R9 M380, which has GPU clock speed of 1000 MHz, and 4096 MB of GDDR5 memory running at 1500 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M380 should in theory perform quite a bit faster than the GeForce 9800 GTX overall. (explain)

Radeon R9 M380		96000 MB/sec
GeForce 9800 GTX		70400 MB/sec
	Difference: 25600 (36%)

Texel Rate

The GeForce 9800 GTX is a bit (approximately 8%) faster with regards to AF than the Radeon R9 M380. (explain)

GeForce 9800 GTX		43200 Mtexels/sec
Radeon R9 M380		40000 Mtexels/sec
	Difference: 3200 (8%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 M380 is a better choice, by a large margin. (explain)

Radeon R9 M380		16000 Mpixels/sec
GeForce 9800 GTX		10800 Mpixels/sec
	Difference: 5200 (48%)

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 maximum amount of data (measured in MB per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 are applied in one second. This number is calculated by multiplying the total amount of 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.