Radeon HD 7850 vs Radeon R9 285

Intro

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

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 little bit faster than the Radeon HD 7850 overall. (explain)

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

Texel Rate

The Radeon R9 285 should be quite a bit (about 87%) better at AF than the Radeon HD 7850. (explain)

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

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 285 is the winner, but it probably won't make a huge difference. (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 max amount of data (in units of megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that can be 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 this number, the better the video card will be at 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 graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.