GeForce 820M vs Radeon R9 290

Intro

Compare those specifications to the Radeon R9 290, which features a GPU core clock speed of 800 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 512-bit bus. It also is comprised of 2560 Stream Processors, 160 Texture Address Units, and 64 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 290		9876 points
GeForce 820M		850 points
	Difference: 9026 (1062%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Performance-wise, the Radeon R9 290 should in theory be a lot better than the GeForce 820M in general. (explain)

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

Texel Rate

The Radeon R9 290 is much (about 1013%) better at anisotropic filtering than the GeForce 820M. (explain)

Radeon R9 290		128000 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 116496 (1013%)

Pixel Rate

The Radeon R9 290 will be quite a bit (more or less 1680%) more effective at FSAA than the GeForce 820M, and also should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 290		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: Bandwidth is the largest amount of information (measured in MB per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock 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 many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.