GeForce GTX 465 vs Radeon R9 285

Intro

Compare that to the Radeon R9 285, which features GPU core speed of 918 MHz, and 2048 MB of GDDR5 memory running at 1375 MHz through a 256-bit bus. It also 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 285		190 Watts
GeForce GTX 465		200 Watts
	Difference: 10 Watts (5%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 285 should be 72% faster than the GeForce GTX 465 in general, because of its greater data rate. (explain)

Radeon R9 285		176000 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 73408 (72%)

Texel Rate

The Radeon R9 285 is quite a bit (approximately 285%) more effective at texture filtering than the GeForce GTX 465. (explain)

Radeon R9 285		102816 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 76108 (285%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 285 is a better choice, by a large margin. (explain)

Radeon R9 285		29376 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 9952 (51%)

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 data (counted in megabytes per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units 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 fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.