Radeon R9 280 vs Radeon R9 285

Intro

Compare those specs to the Radeon R9 285, which comes with a GPU core clock speed of 918 MHz, and 2048 MB of GDDR5 RAM running at 1375 MHz through a 256-bit bus. It also features 1792 Stream Processors, 112 TAUs, and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 285		8500 points
Radeon R9 280		7961 points
	Difference: 539 (7%)

Ethereum Mining Hash Rate

Radeon R9 280		22 Mh/s
Radeon R9 285		18 Mh/s
	Difference: 4 (22%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285		190 Watts
Radeon R9 280		250 Watts
	Difference: 60 Watts (32%)

Memory Bandwidth

Performance-wise, the Radeon R9 280 should theoretically be quite a bit better than the Radeon R9 285 overall. (explain)

Radeon R9 280		240000 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 64000 (36%)

Texel Rate

The Radeon R9 280 should be just a bit (about 2%) better at texture filtering than the Radeon R9 285. (explain)

Radeon R9 280		104496 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 1680 (2%)

Pixel Rate

The Radeon R9 280 should be a small bit (approximately 2%) better at AA than the Radeon R9 285, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 280		29856 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 480 (2%)

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 maximum amount of data (in units of megabytes per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. If the card has 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 faster 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 are applied in one second. This figure is calculated by multiplying the total amount of texture units by the core 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated 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 outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.