GeForce RTX 3090 vs Radeon R9 285

Intro

Compare those specifications to the Radeon R9 285, which features GPU clock speed of 918 MHz, and 2048 MB of GDDR5 RAM running at 1375 MHz through a 256-bit bus. It also is comprised of 1792 SPUs, 112 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285		190 Watts
GeForce RTX 3090		350 Watts
	Difference: 160 Watts (84%)

Memory Bandwidth

Theoretically, the GeForce RTX 3090 should perform much faster than the Radeon R9 285 overall. (explain)

GeForce RTX 3090		958668 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 782668 (445%)

Texel Rate

The GeForce RTX 3090 should be much (more or less 345%) more effective at AF than the Radeon R9 285. (explain)

GeForce RTX 3090		457560 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 354744 (345%)

Pixel Rate

The GeForce RTX 3090 will be a lot (more or less 432%) more effective at full screen anti-aliasing than the Radeon R9 285, and will be capable of handling higher resolutions without losing too much performance. (explain)

GeForce RTX 3090		156240 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 126864 (432%)

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 megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. 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 also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.