GeForce 820M vs Radeon R7 370 4G

Intro

Compare that to the Radeon R7 370 4G, which uses a 28 nm design. AMD has set the core speed at 975 MHz. The GDDR5 memory is set to run at a frequency of 1400 MHz on this card. It features 1024 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Radeon R7 370 4G		110 Watts
	Difference: 95 Watts (633%)

Memory Bandwidth

Performance-wise, the Radeon R7 370 4G should in theory be much better than the GeForce 820M overall. (explain)

Radeon R7 370 4G		179200 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 163200 (1020%)

Texel Rate

The Radeon R7 370 4G is quite a bit (about 442%) more effective at texture filtering than the GeForce 820M. (explain)

Radeon R7 370 4G		62400 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 50896 (442%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R7 370 4G is superior to the GeForce 820M, and very much so. (explain)

Radeon R7 370 4G		31200 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 28324 (985%)

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 (counted in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.