Radeon R9 280X vs Radeon R9 285

Intro

Compare all that to the Radeon R9 285, which features core speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 RAM. It features 1792 SPUs along with 112 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

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 280X		8886 points
Radeon R9 285		8500 points
	Difference: 386 (5%)

Ethereum Mining Hash Rate

Radeon R9 280X		21 Mh/s
Radeon R9 285		18 Mh/s
	Difference: 3 (17%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Performance-wise, the Radeon R9 280X should in theory be a lot better than the Radeon R9 285 overall. (explain)

Radeon R9 280X		288000 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 112000 (64%)

Texel Rate

The Radeon R9 280X will be just a bit (approximately 6%) better at texture filtering than the Radeon R9 285. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 5984 (6%)

Pixel Rate

The Radeon R9 285 is a bit (approximately 8%) more effective at full screen anti-aliasing than the Radeon R9 280X, and should be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon R9 280X		27200 Mpixels/sec
	Difference: 2176 (8%)

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 max amount of data (measured in MB per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total amount of texture units by the core 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 maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units 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 output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.