GeForce GTX 285 2GB vs Radeon R9 390X 8G

Intro

Compare those specifications to the Radeon R9 390X 8G, which comes with core speeds of 1050 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2816 SPUs as well as 176 TAUs and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 2GB		204 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 71 Watts (35%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G should perform quite a bit faster than the GeForce GTX 285 2GB overall. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce GTX 285 2GB		158976 MB/sec
	Difference: 225024 (142%)

Texel Rate

The Radeon R9 390X 8G is much (approximately 256%) more effective at AF than the GeForce GTX 285 2GB. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 132960 (256%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 390X 8G is superior to the GeForce GTX 285 2GB, and very much so. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 46464 (224%)

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 largest amount of information (counted in megabytes per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 amount of texture map elements (texels) that can be 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 the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory per 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 clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.