Radeon R7 240 vs Radeon R9 285

Intro

Compare those specifications to the Radeon R9 285, which features GPU core speed of 918 MHz, and 2048 MB of GDDR5 RAM running at 1375 MHz through a 256-bit bus. It also 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 R7 240		1218 points
	Difference: 7282 (598%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon R9 285		190 Watts
	Difference: 160 Watts (533%)

Memory Bandwidth

In theory, the Radeon R9 285 should be a lot faster than the Radeon R7 240 overall. (explain)

Radeon R9 285		176000 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 147200 (511%)

Texel Rate

The Radeon R9 285 will be quite a bit (approximately 604%) more effective at anisotropic filtering than the Radeon R7 240. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 88216 (604%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 285 is the winner, by a large margin. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 23536 (403%)

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 max amount of data (in units of megabytes per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, the result should 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 high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 most pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. 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 output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.