GeForce 820M vs Radeon R5 M330

Intro

Compare all that to the Radeon R5 M330, which has a clock frequency of 1030 MHz and a DDR3 memory speed of 900 MHz. It also features a 64-bit bus, and uses a 28 nm design. It features 320 SPUs, 20 TAUs, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce 820M should be a bit faster than the Radeon R5 M330 in general. (explain)

GeForce 820M		16000 MB/sec
Radeon R5 M330		14400 MB/sec
	Difference: 1600 (11%)

Texel Rate

The Radeon R5 M330 will be quite a bit (approximately 79%) faster with regards to anisotropic filtering than the GeForce 820M. (explain)

Radeon R5 M330		20600 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 9096 (79%)

Pixel Rate

The Radeon R5 M330 will be a lot (more or less 187%) more effective at full screen anti-aliasing than the GeForce 820M, and also able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R5 M330		8240 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 5364 (187%)

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 max amount of information (measured in MB per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is calculated 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.