GeForce GTX 285 1GB vs Radeon R9 380 2G

Intro

Compare those specs to the Radeon R9 380 2G, which comes with a clock speed of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It is made up of 1792 SPUs, 112 Texture Address Units, 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 1GB		204 Watts
	Difference: 14 Watts (7%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 2G is 15% quicker than the GeForce GTX 285 1GB in general, due to its higher data rate. (explain)

Radeon R9 380 2G		182400 MB/sec
GeForce GTX 285 1GB		158976 MB/sec
	Difference: 23424 (15%)

Texel Rate

The Radeon R9 380 2G should be quite a bit (about 110%) faster with regards to anisotropic filtering than the GeForce GTX 285 1GB. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
GeForce GTX 285 1GB		51840 Mtexels/sec
	Difference: 56800 (110%)

Pixel Rate

The Radeon R9 380 2G is a lot (approximately 50%) better at FSAA than the GeForce GTX 285 1GB, and also should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
GeForce GTX 285 1GB		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 max amount of data (counted in MB per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video 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 the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to 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 potential to reach the maximum fill rate.