Radeon HD 7850 vs Radeon R9 285

Intro

Compare those specs to the Radeon R9 285, which features a core clock frequency of 918 MHz and a GDDR5 memory frequency of 1375 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 1792 SPUs, 112 TAUs, and 32 Raster Operation 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, the Radeon R9 285 should be just 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%) faster with regards to 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 running with lots of anti-aliasing 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 largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.