GeForce GTX 285 1GB vs Radeon R9 380 4G

Intro

Compare all of that to the Radeon R9 380 4G, which features a GPU core clock speed of 970 MHz, and 4096 MB of GDDR5 memory set to run at 1425 MHz through a 256-bit bus. It also features 1792 Stream Processors, 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 4G		190 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 14 Watts (7%)

Memory Bandwidth

Performance-wise, the Radeon R9 380 4G should theoretically be just a bit superior to the GeForce GTX 285 1GB overall. (explain)

Radeon R9 380 4G		182400 MB/sec
GeForce GTX 285 1GB		158976 MB/sec
	Difference: 23424 (15%)

Texel Rate

The Radeon R9 380 4G is much (more or less 110%) more effective at AF than the GeForce GTX 285 1GB. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
GeForce GTX 285 1GB		51840 Mtexels/sec
	Difference: 56800 (110%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 380 4G is the winner, and very much so. (explain)

Radeon R9 380 4G		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 largest amount of information (measured in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that 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 number of ROPs by the clock 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.