GeForce 820M vs Radeon R9 290X

Intro

Compare those specifications to the Radeon R9 290X, which makes use of a 28 nm design. AMD has set the core speed at 800 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this specific model. It features 2816 SPUs as well as 176 Texture Address Units and 64 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 290X		10609 points
GeForce 820M		850 points
	Difference: 9759 (1148%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Radeon R9 290X		300 Watts
	Difference: 285 Watts (1900%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 290X should perform a lot faster than the GeForce 820M overall. (explain)

Radeon R9 290X		320000 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 304000 (1900%)

Texel Rate

The Radeon R9 290X is much (more or less 1124%) more effective at texture filtering than the GeForce 820M. (explain)

Radeon R9 290X		140800 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 129296 (1124%)

Pixel Rate

The Radeon R9 290X will be quite a bit (approximately 1680%) better at full screen anti-aliasing than the GeForce 820M, and able to handle higher resolutions without slowing down too much. (explain)

Radeon R9 290X		51200 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 48324 (1680%)

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 (counted in megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip 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 Raster Operations Pipelines by the the core 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 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 max fill rate.