GeForce GTX 650 Ti 2GB vs Radeon R9 285

Intro

Compare all of that to the Radeon R9 285, which has a clock speed of 918 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is made up of 1792 SPUs, 112 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 2GB		110 Watts
Radeon R9 285		190 Watts
	Difference: 80 Watts (73%)

Memory Bandwidth

In theory, the Radeon R9 285 should be much faster than the GeForce GTX 650 Ti 2GB in general. (explain)

Radeon R9 285		176000 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 89600 (104%)

Texel Rate

The Radeon R9 285 should be a lot (about 73%) better at texture filtering than the GeForce GTX 650 Ti 2GB. (explain)

Radeon R9 285		102816 Mtexels/sec
GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
	Difference: 43424 (73%)

Pixel Rate

The Radeon R9 285 should be much (approximately 98%) more effective at FSAA than the GeForce GTX 650 Ti 2GB, and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 285		29376 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 14528 (98%)

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 transported across the external memory interface in a second. The number is worked out by multiplying the bus 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 card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the 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 most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of 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.