GeForce GTX 285 2GB vs Radeon R9 380 2G

Intro

Compare those specs to the Radeon R9 380 2G, which makes use of a 28 nm design. AMD has clocked the core frequency at 970 MHz. The GDDR5 RAM works at a speed of 1425 MHz on this specific card. It features 1792 SPUs along with 112 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380 2G		190 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 14 Watts (7%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 2G will be 15% quicker than the GeForce GTX 285 2GB in general, because of its higher data rate. (explain)

Radeon R9 380 2G		182400 MB/sec
GeForce GTX 285 2GB		158976 MB/sec
	Difference: 23424 (15%)

Texel Rate

The Radeon R9 380 2G will be quite a bit (approximately 110%) faster with regards to texture filtering than the GeForce GTX 285 2GB. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 56800 (110%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 380 2G is a better choice, and very much so. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 10304 (50%)

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 maximum amount of information (counted in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

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