GeForce 820M vs Radeon R9 285

Intro

Compare all that to the Radeon R9 285, which uses a 28 nm design. AMD has set the core speed at 918 MHz. The GDDR5 RAM works at a frequency of 1375 MHz on this specific card. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

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
GeForce 820M		850 points
	Difference: 7650 (900%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Radeon R9 285		190 Watts
	Difference: 175 Watts (1167%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 285 is 1000% quicker than the GeForce 820M in general, because of its higher data rate. (explain)

Radeon R9 285		176000 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 160000 (1000%)

Texel Rate

The Radeon R9 285 is much (approximately 794%) better at AF than the GeForce 820M. (explain)

Radeon R9 285		102816 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 91312 (794%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 285 is superior to the GeForce 820M, by far. (explain)

Radeon R9 285		29376 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 26500 (921%)

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 information (measured in megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory per 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 - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.