Radeon HD 7850 vs Radeon R9 285

Intro

Compare all of 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 as well as 112 Texture Address Units 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 HD 7850		5200 points
	Difference: 3300 (63%)

Ethereum Mining Hash Rate

Radeon R9 285		18 Mh/s
Radeon HD 7850		13 Mh/s
	Difference: 5 (38%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850		130 Watts
Radeon R9 285		190 Watts
	Difference: 60 Watts (46%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 285 should be a bit faster than the Radeon HD 7850 in general. (explain)

Radeon R9 285		176000 MB/sec
Radeon HD 7850		153600 MB/sec
	Difference: 22400 (15%)

Texel Rate

The Radeon R9 285 will be much (approximately 87%) better at texture filtering than the Radeon HD 7850. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon HD 7850		55040 Mtexels/sec
	Difference: 47776 (87%)

Pixel Rate

The Radeon R9 285 should be just a bit (about 7%) faster with regards to anti-aliasing than the Radeon HD 7850, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon HD 7850		27520 Mpixels/sec
	Difference: 1856 (7%)

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 (measured in megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total number of texture units of the card 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can 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 Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.