Radeon R7 250X vs Radeon R9 285

Intro

Compare those specifications to the Radeon R9 285, which comes with GPU clock speed of 918 MHz, and 2048 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also is made up of 1792 Stream Processors, 112 Texture Address Units, and 32 ROPs.

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 285		8500 points
Radeon R7 250X		2860 points
	Difference: 5640 (197%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X		95 Watts
Radeon R9 285		190 Watts
	Difference: 95 Watts (100%)

Memory Bandwidth

Performance-wise, the Radeon R9 285 should theoretically be a lot superior to the Radeon R7 250X overall. (explain)

Radeon R9 285		176000 MB/sec
Radeon R7 250X		72000 MB/sec
	Difference: 104000 (144%)

Texel Rate

The Radeon R9 285 will be quite a bit (more or less 157%) more effective at texture filtering than the Radeon R7 250X. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon R7 250X		40000 Mtexels/sec
	Difference: 62816 (157%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 285 is the winner, and very much so. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon R7 250X		16000 Mpixels/sec
	Difference: 13376 (84%)

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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units of the card 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 in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.