Radeon R7 250X 2GB vs Radeon R9 285

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB		95 Watts
Radeon R9 285		190 Watts
	Difference: 95 Watts (100%)

Memory Bandwidth

In theory, the Radeon R9 285 should perform much faster than the Radeon R7 250X 2GB overall. (explain)

Radeon R9 285		176000 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 104000 (144%)

Texel Rate

The Radeon R9 285 is much (approximately 157%) faster with regards to texture filtering than the Radeon R7 250X 2GB. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 62816 (157%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 285 is the winner, by far. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon R7 250X 2GB		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 largest amount of information (measured in MB per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. 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 faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total amount 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units 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 fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.